Herman Wildrik Barkema

Name: Herman Wildrik Barkema
2. Personal Data
Home address: 1742 – 7th Avenue NW
Calgary, AB, T2N 0Z4 Canada
Home phone: (403) 441 5320
Work phone: (403) 220 2659
Cell phone: (403) 826 9846
E-mail: barkema@ucalgary.ca (work)
anneliesengel@shaw.ca (home)
Date/place of birth: 27 September 1960
Lemsterland
The Netherlands
Citizenship: Canada
3. Academic Qualifications
1998 Bovine specialist, Royal Dutch Veterinary College
1998 PhD in Veterinary Epidemiology, Utrecht University
1994 Epidemiologist A, Dutch National Science Foundation
1988 DVM, Utrecht University, The Netherlands
4. Employment History
2014 — NSERC Industrial Research Chair in Infectious Diseases of Dairy Cattle
(Supported by Alberta Milk, Dairy Farmers of Canada, Dairy Farmers of
Manitoba, BC Milk, Westgen Endowment Fund, CanWest DHI, and Canadian
Dairy Network)
2008 — 2013 Head of the Department of Production Animal Health, Faculty of Veterinary
Medicine, University of Calgary
2007 — Professor Epidemiology of Infectious Diseases, Department of Community
Health Sciences, Faculty of Medicine, University of Calgary
2007 – 2008 Interim Head of the Department of Production Animal Health, Faculty of
Veterinary Medicine, University of Calgary
2006 — Professor Epidemiology of Infectious Diseases, Department of Production
Animal Health, Faculty of Veterinary Medicine, University of Calgary
2
2006 — Graduate Faculty, Department of Community Health Sciences, Faculty of Medicine, University of Calgary
2006 — Graduate Faculty, Department of Medicine, Faculty of Medicine, University of Calgary
2006 — Adjunct Professor and Graduate Faculty, University of Prince Edward Island (renewed Jan. 2014)
2006 Professor Epidemiology/Farm Service (accelerated promotion), Department of
Health Management, Atlantic Veterinary College, University of Prince Edward Island
2001 – 2006 Associate Professor Epidemiology/Farm Service, Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island.
1992 – 2001 Veterinarian/epidemiologist of the Ruminant department of the Dutch Animal Health Service, Drachten, the Netherlands
1990 – 1992 Veterinarian, Department of Herd Health and Reproduction, Utrecht University
1989 – 1990 Veterinarian, Department of Ambulatory Clinic and Herd Health, Veterinary
Faculty, Universidad Nacional, Costa Rica
1988 – 1989 Manager and veterinarian of a 3500 cow dairy and beef herd, Boca de Arenal, Costa Rica
5. Professional Awards and Honors
 Journal of Dairy Science Most Cited Award, 2015. This award is presented annually by Elsevier and Journal of Dairy Science to recognize contributors to Journal of Dairy Science whose work is significantly impacting research and the dairy industry.
 Fellow of the Canadian Academy of Health Sciences. 2014. This fellowship is one of the most prestigious awards in Canada recognizing substantial contributions to health science.
 Journal of Dairy Science Most Cited Award, 2014. This award is presented annually by Elsevier and Journal of Dairy Science to recognize contributors to Journal of Dairy Science whose work is significantly impacting research and the dairy industry.
 University of Calgary Teaching Award for Curriculum Development. 2014. This award is presented annually by the University of Calgary and was given to the initial faculty members of UCVM as a group in recognition of outstanding contributions in the area of curriculum development.
 West Agro, Inc. Award, 2013. This award is presented annually by the American Dairy Science Association to recognize outstanding research of milk quality as affected by control of mastitis, management of milking, and practices in production of milk.
 Journal of Dairy Science Most Cited Award, 2011. This award is presented annually by Elsevier and Journal of Dairy Science to recognize contributors to Journal of Dairy Science whose work is significantly impacting research and the dairy industry.
 Intervet/Schering-Plough Award, 2010. This award is presented annually by the Canadian Veterinary Medical Association to a veterinarian whose work in large
3
animal practice, clinical research or basic sciences has contributed significantly to the advancement of large animal medicine, surgery and theriogenology, including herd health management.
 Guest Professor at Dept. of Obstetrics, Fertility and Herd Health, Ghent University, Belgium, 2008-2018 (renewed in 2013). This is an honorary position with a 5% time commitment.
 Merit Award for Scholarly Achievement, 2006. This is the annual research award of the University of Prince Edward Island Faculty Association.
 Pfizer Animal Health Award for Research Excellence, 2005. This is the annual research award of the Atlantic Veterinary College.
 Nominated by the UPEI Graduate Student Association for the Pfizer Carl J. Norden Distinguished Teacher Award, 2005 and 2006.
 Dutch Veterinary Journal. Best journal manuscript for 2002.
 Dutch Veterinary Journal. Best journal manuscript for 1994.
6. Professional Memberships
 Canadian Veterinary Medical Association
 Alberta Veterinary Medical Association (License No. 2388)
 University of Calgary GastroIntestinal Research Group
 University of Calgary Snyder Institute for Chronic Diseases
 Calgary Institute for Public Health
 Royal Dutch Veterinary College
 NMC (National Mastitis Council)
 American Dairy Science Association
 American Association of Bovine Practitioners
 Canadian Society for Epidemiology and Biostatistics
7. Professional Activities
Current:
 Chair EU Expert Group on Paratuberculosis funded by the DISCONTOOLS project (2014 – present)
 Dairy Farmers of Canada Biosecurity Working Group (2014 – present)
 American Dairy Science Association West Agro, Inc. Award selection committee (2013 – present)
 Adviser, USDA-NIFA-funded project “An Integrated Milk Quality Extension and Education Program to Reduce Mastitis” (2012 – present)
 Chair technical committee of Canadian Johne’s Disease Initiative (2008 – present)
4
 Organizing committee of UCVM Annual Beef Health Conferences (May 2011, June 2012, June 2013 and June 2014). I have founded this event and chaired the first 3 conferences. Drs. John Kastelic and Claire Windeyer are the current co-chairs
 Together with Drs. Jeroen De Buck and Karin Orsel, I have organized the first six annual Canadian Mycobacterium avium subsp. paratuberculosis meetings in Banff in October 2008 to 2013, and we are currently organizing the 7th meeting
 Leader Alberta Inflammatory Bowel Disease Consortium (2009 – present)
 Alberta Johne’s Disease Initiative Advisory Committee (2009 – present)
 Alberta Animal Health Strategy Working Committee (2007 – present)
 Dairy Farmers of Canada Production Expert Scientific Advisory Committee (PESAC) (2007 – present)
 Scientific Committee of the Canadian Bovine Mastitis Research Network, Leader of
the Environment Theme (2003 – present)
 Research Committee of the National Mastitis Council (NMC), USA (2005 – present)
Past:
 Organizing committee of the 2014 summer meeting of the NMC in Ghent, Belgium
 Organizing committee of the 2014 annual meeting of the NMC in Fort Worth, TX, USA
 Search and selection committee NSERC Industrial Research Chair Dairy Cattle/Nutrition/Physiology, University of Alberta (2013 – 2014)
 Interim Scientific Director Canadian Bovine Mastitis Research Network (2011 – 2012)
 Board of NMC (formerly National Mastitis Council) (2008 – 2011)
 Chair of the International Advisory Committee of the National Mastitis Council (NMC), USA (2006 – 2011)
 External advisor of Dutch National Mastitis Reduction Project (2004 – 2011)
 Vice-chair technical committee of Canadian Johne’s Disease Initiative (2008 – 2009)
 Program committee of the Canadian Voluntary Johne’s Disease Prevention and Control Program (2008 – 2009)
 Alberta Johne’s Disease Working Group (2006 – 2009)
 Vice-chair of the International Advisory Committee of the National Mastitis Council (NMC), USA (2004 – 2006)
 Canadian Voluntary Johne’s Disease Prevention and Control Program Committee of the Canadian Animal Health Coalition (2005 – 2006), chair of both the program design and the concurrent research subcommittee
The establishment of both control programs was accomplished in close collaboration with the provincial Dairy Boards and Cattlemen Associations, the provincial ministries of Agriculture and Fisheries, provincial bovine practitioners, Dairy Farmers of Canada and the Canadian Cattlemen Association
 Organizing committee of the 2008 annual meeting of the NMC in New Orleans, USA
 Organizing committee of the Conference on Heifer Mastitis, Ghent, Belgium, June 2007. I was the editor of the proceedings that were published as a special issue in Vet. Microbiol. (2009) 134.
5
 Organizing committee of the 2007 annual meeting of the Am. Assoc. of Bovine Practitioners, Vancouver, Canada. I was responsible for the organization of the dairy section
 Scientific committee of the 2008 Canadian Association of Veterinary Epidemiology and Production Management annual meeting, Charlottetown, PEI, Canada
 Organizing committee of the 2007 Canadian Association of Veterinary Epidemiology and Production Management annual meeting, Edmonton, AB, Canada
 Organizing committee of the 2006 National Mastitis Council (NMC) summer meeting in Charlottetown, Prince Edward Island, Canada
 Organizing committee of the 2006 annual meeting of the National Mastitis Council (NMC) in Orlando (FL), USA
 Organizing committee of the 2004 annual meeting of the National Mastitis Council (NMC) in Charlotte (NC), USA
8. Participation on University, College and Department Committees
University of Calgary (2006 -)
Current:
 UofC Advisory Committee on Knowledge Engagement (ACKE) (2015 -)
 UofC SUPPORT: Research Infrastructure Programs subcommittee (2013 -)
 Executive Council of the Snyder Institute for Chronic Diseases (2012 -)
 UCVM Research Committee (2013 -)
 UCVM Graduate Scholarship Evaluation Committee (2013 -)
 UofC Academic Review Committee for the University Fundraising Campaign
(2012 -)
Past:
 UCVM Academic Appointment Review Committee (2013, 2014)
 UCVM Government and International Relations Committee (2008 – 2013)
 UCVM Leadership Council (2007 – 2013)
 UofC Killam Memorial Chair Selection Committee, 2011
 UCVM Research Strategy Committee (2008 – 2010)
 Faculty of Veterinary Medicine (UCVM) 3rd year teachers committee (2009 – 2010)
 UCVM Curriculum Working Group (2008)
 UCVM Student Affairs Working Group (2008)
 UCVM Admissions committee (2006 – 2007)
 UCVM Library committee (2006 – 2007)
 UCVM Distributed Veterinary Teaching Hospital committee (2006 – 2008)
 Many (>30) UCVM faculty search and selection committees, most of whom I have chaired
UPEI (2001-2006)
6
 AVC Diagnostic Research Committee (2006)
 University of Prince Edward Island senate (2005 – 2006)
 UPEI Faculty Association Finance committee (2004 – 2006)
 Atlantic Veterinary College (AVC) Teaching Space Allocation Committee (2002 – 2005)
 AVC Population Health Space Allocation Committee (2002 – 2005)
9. Editorial Activity
Current:
 Editorial Board of Journal of Dairy Science (2005 – 2011, and 2014 – present)
 Editorial Advisory Board of Preventive Veterinary Medicine (1998 – present)
Past:
 Editorial Board of Veterinary Research (2008 – 2010)
 Editor of a special issue of Veterinary Microbiology on Heifer Mastitis (2007 – 2008)
 Board of Scientific Reviewers for the American Journal of Veterinary Research (2003 – 2006)
 Editor of a special issue of the Dutch Veterinary Journal on Chronic Wasting Disease in Cattle (2001)
10. Reviewer for (52 manuscripts in 2014):
 Preventive Veterinary Medicine
 Journal of Dairy Science
 Animal
 Epidemiology and Infection
 Canadian Veterinary Journal
 Journal of the American Veterinary Medical Association
 American Journal of Veterinary Research
 Canadian Journal of Veterinary Research
 Veterinary Research
 International Journal of Parasitology
 Veterinary Parasitology
 Veterinary Microbiology
 Acta Veterinaria Scandinavia
 Journal of Dairy Research
 Tijdschrift voor Diergeneeskunde (Dutch Veterinary Journal)
 Theriogenology
 Veterinary Record
 New Zealand Veterinary Journal
 Foodborne Pathogens and Disease
7
 Inflammatory Bowel Disease
 Veterinary Medicine International
 Journal of Mammary Gland Biology and Neoplasia
 Irish Veterinary Journal
 Animal Welfare
 Veterinary Quarterly
Additionally, I review on a regular basis books, and research proposals (NSERC, CHIR, USDA, Agricultural Funding Consortium, the Wellcome Trust, Alberta Livestock Industry Development Fund, Alberta Livestock and Meat Agency, Beef Cattle Research Council, Manitoba Rural Adaptation Council, Alberta Innovates – BioSolutions, MITACS, Genome BC, and The Academy of Finland).
 As a member of Dairy Farmers of Canada’s Production Expert Scientific Advisory Committee (PESAC) I review the research proposals (2007 – present). This committee meets two times annually, in the spring to evaluate and select the LOIs and in the fall to evaluate and select the full proposals that will be recommended for funding to the Board and to NSERC for matching funding.
 I have reviewed promotion files to full professor for Cornell University (2008), University of Saskatchewan (2009), University of Minnesota (2009), University of British Columbia (2009), University of Georgia (2010), University of Jordan (2010), and the University of Alberta (2013), and tenures files for the University of Saskatchewan (2008), Cornell University (2011), Washington State University (2012), North Carolina State University (2012), University of Jordan (2013), University of Guelph (2014), and the University of Vermont (2014).
 I have been an external evaluator for full professor positions in Disease Modelling (2010) and Disease Control and Prevention (2013) at the University of Copenhagen, and a full professor position in Milk Quality and Cattle Health at the University of Helsinki (2014). Finally, I have been an external member of the search and selection committee for an NSERC Industrial Research Chair in Cattle Production at the University of Alberta (2013), and two Assist. Prof. positions in Biostatistics in the Dept. of Mathematics of the University of Calgary (2013 and 2014).
11. Most Significant Contributions to Research
The over-all goal of my research program is to ensure a safe and economical food supply with a reduced risk to transmission of zoonotic diseases to farm families and the general population. I have two main research interests. My first interest is research to prevent and control infectious diseases on dairy farms, such as mastitis and Johne’s disease, with animal and public health perspectives. New prevention and control programs in Canada, The Netherlands, and other countries have been introduced or changed based on results of my research. My second main research interest is the interaction between host, microbes and the environment in Inflammatory Bowel Disease. I lead the Alberta Inflammatory Bowel Disease Consortium, a strategic research initiative funded by Alberta Innovates – Health Solutions. All my research projects are carried out by graduate students, often with assistance of summer students. Because I value a
8
multidisciplinary education of these graduate students, all my graduate students are co-supervised by a faculty member with a complimentary expertise, most often a basis scientist. Knowledge transfer and exchange is a logical and important extension of my research program.
1. Bovine mastitis
a. Prevention and control of mastitis in dairy cattle (96 papers in refereed journals, 1 accepted and 1 submitted paper, and 1 book chapter). Bovine mastitis is the most costly disease of the dairy industry worldwide. Every year, approximately 25% of dairy cows are affected by clinical mastitis, whereas the incidence of subclinical mastitis is even higher. We have demonstrated that the management practices to decrease the prevalence of subclinical mastitis are available, and that this decrease does not lead to an increased incidence of clinical mastitis. We have suggested and evaluated improved detection methods of intramammary infection. Also, we have determined factors that determine cure of Staphylococcus aureus mastitis treatment, and developed algorithms that predict the cure rate. With the results of the studies, mastitis prevention and control programs in The Netherlands, Canada, the US and many other countries have been improved. I have served as a Board member of the NMC, the international organization for udder health research, was Chair of the International Advisory Committee, and am a member of the Research Committee. Also, I have served as advisor of the Dutch Udder Health Centre, and I currently am adviser of the USDA-NIFA funded project “An Integrated Milk Quality Extension and Education Program to Reduce Mastitis”.
b. Canadian Bovine Mastitis and Milk Quality Research Network
The Canadian Bovine Mastitis and Milk Quality Research Network (CBMQRN) was established to help the dairy industry reduce mastitis. It is the most comprehensive and exciting research endeavour in support of the dairy industry that has ever existed in Canada. The Network consists of 38 scientific investigators at 8 universities and 2 federal research institutions who have expertise in a wide variety of scientific disciplines (genetics, epidemiology, clinical medicine, immunology, microbiology, etc.) and who have come together to work as a team to tackle the most important mastitis research issues. I am the leader of the Environment theme (there are 2 other themes). Funding was committed for 5 years by NSERC ($7.1 million), and the dairy industry ($2.2 million). Dairy Farmers of Canada has asked CBMRN to select projects for a total of $1 million in funding for the Dairy Cluster. I lead one of the three research activities: “Enhancing sustainable production of safe, high quality milk by optimizing dairy farm best management practices for preventing mastitis and reducing its environmental impact.” Additionally, I have been the Interim Scientific Director for a year. The CBMRN has recently been awarded $1.8 million in funding for the second 5-year Dairy Cluster of Dairy Farmers of Canada and Agriculture and Agri-Food Canada and a 6-year NSERC CREATE grant for training of graduate students and post-doctoral fellows in Milk Quality.
2. Inflammatory Bowel Disease (IBD)
a. IBD research (10 papers in refereed journals, 2 accepted, 2 submitted papers). Inflammatory bowel diseases (IBD) are a group of chronic, idiopathic and debilitating illnesses comprised mainly of Crohn’s disease (CD) and ulcerative colitis (UC). A systematic review published by the Alberta IBD Consortium demonstrated that 0.5% of
9
Canadians are affected by IBD and more than 9,000 new diagnoses are made annually. Alberta ranks among the highest in the world in terms of IBD prevalence, and the incidence continues to rise.
b. Alberta IBD Consortium
Currently in its fifth year of a 5-year, $5 million Interdisciplinary Team Grant (ITG) from AHFMR (now Alberta Innovates—Health Solutions), the Alberta IBD Consortium was formed to identify key gene-environment-microbe interactions that will lead to a better understanding of the pathogenesis of IBD. I am the leader of the Consortium, which now consists of a multidisciplinary team of 41 clinicians and scientists, mainly from the Universities of Calgary and Alberta, but including members in Lethbridge and Toronto. A key deliverable of the Consortium has been development of one of the world’s most comprehensive IBD patient cohorts, with genotype, phenotype, serotype and environmental data for over 2,000 individuals. An integral part of this collaborative approach to tackling IBD is engaging a wide range of stakeholders in a comprehensive integrated knowledge transfer and exchange (KTE) program in partnership with the Crohn’s and Colitis Foundation of Canada (CCFC). An additional $4.5 million has already been secured from a variety of sources to support this initiative.
3. Johne’s disease
a. Johne’s disease research (19 papers in refereed journals, 1 accepted and 4 submitted papers, and 2 book chapters). Johne’s disease (paratuberculosis) is an infectious, chronic enteritis caused by Mycobacterium avium subsp. paratuberculosis (MAP). It results in intermittent diarrhea, loss of body condition and lower productivity in both beef and dairy cattle. Currently, it is non-treatable and in the terminal stage, cattle die in an extremely weakened state. Johne’s disease is widespread in cattle populations in most countries with major dairy and beef industries. There is a potential association of MAP with Crohn’s disease. We have determined the prevalence of MAP-infection in cattle in The Netherlands and Atlantic Canada (16%), evaluated diagnostic tests, and improved testing schemes and prevention and control programs. Currently, we are conducting a study to determine the age- and dose-dependent susceptibility of calves to MAP. The results of our research program have defined the testing strategies currently used worldwide in Johne’s disease control programs.
b. Canadian Johne’s disease prevention and control programs
In May 2005, the Canadian Animal Health Coalition was sanctioned by its stakeholders, the Canadian dairy and beef industry, provincial ministries of agriculture, veterinary colleges and associations of bovine practitioners, to design a national Johne’s disease control program. Five subcommittees were formed, 3 of which I was requested to chair: ‘Goals and Objectives’, ‘Design of the Program’, and ‘Concurrent Research’. In May 2006, the committee delivered the draft of the program, including a knowledge transfer program and a template of the concurrent research program. The commodities have approved the program in the summer of 2007 and in July 2008 Agriculture and Agri-Food Canada have approved the program and its budget under the Advancing Canadian Agriculture and Agri-Food program. I lead the Scientific Committee in this program and I am co-chair of the Technical Committee.
10
Additionally, regional initiatives for Johne’s disease control programs have started. With funding of the PEI Holstein branch, I started with the group at the Atlantic Veterinary College a program on PEI, and requests for funding were submitted in New Brunswick, Nova Scotia and Newfoundland by the provincial Dairy Boards that were approved after I left PEI. After moving to Alberta, I am now actively involved in the Alberta Johne’s Disease Working Group. With a small group, we drafted a proposal for the Alberta Johne’s Disease Initiative which was funded by the Alberta Livestock and Meat Agency and Alberta Milk, the organization of Alberta dairy producers, for $730,000. Our research group at the Department of Production Animal Health coordinates this Initiative to reduce the prevalence and incidence of Johne’s Disease in Alberta. Currently, 355 (~65%) Alberta dairy farms participate in the Alberta Johne’s Disease Initiative.
To improve Johne’s control efforts nation-wide, I have also worked to bring together researchers from other institutions, as well as government and industry experts. Together with Dr. Jeroen De Buck, I have initiated an annual meeting of the Canadian MAP researchers in Banff. This year the meeting will be held for the sixth time.
4. Neospora caninum and prevention and control of neosporosis (10 papers in refereed journals). Neospora caninum is the most frequent cause of abortion outbreaks in cattle herds. We demonstrated that dogs are an important transmission vector in dairy cattle. In a series of fundamental and epidemiological studies, we demonstrated for the first time that dogs could be infected by consumption of infected placentas (fetal membranes) and that introduction of a dog to the farm was associated with outbreaks. We have also found that the coyote may be a definitive host for N. caninum. These results have lead to easily implemented control mechanisms to reduce the incidence of this disease in dairy cattle.
5. Prevention and control of gastro-intestinal infections in cattle (18 papers in refereed journals). A significant proportion of dairy cows are infected with gastro-intestinal parasites such Giardia duodenalis and Cryptosporidium spp. or pathogenic microbes such Salmonella species. Outbreaks cause significant economic losses and shedding animals can be a source of food-borne infections. We have determined the prevalence of infection and risk factors for introduction and persistence of these infections in dairy herds. Also, we have validated cow- and herd-level tests for detection of these infections in dairy herds. Our results were used to design various North-European Salmonella programs.
6. Building a research-intensive department
As Head of the Department of Production Animal Health, I have actively built a research-intensive department (without compromising the quality of teaching DVM and graduate students). After 6 years of building, we now have a well-functioning multidisciplinary department of 17 faculty members. I have mentored all young faculty members (9 have started in our department as 1st year assistant professor), and am co-investigator on many of their first grant proposals. When their CV was not yet sufficient, we have submitted grant proposals with myself as PI and them as Co-PI, with the intention that they would be the supervisor of the graduate student and lead the project. This has been important to start their career, and I am proud to see that all research-intensive members of my department are now successful on their own in obtaining research funding and supervision of graduate students.
11
After 6 years, I have handed the Headship over to Dr. John Kastelic, because I have become an NSERC Industrial Research Chair in Infectious Diseases of Dairy Cattle.
12. Grants received
Since start at Univ. of Calgary (August, 2006 –):
 Reverse vaccinology approach for the prevention of mycobacterial disease in cattle. Genome Canada LSARP, 2015, $7,343,840. Co-Applicant.
 Evaluation of the efficacy of in-parlor treatment of digital dermatitis. Alberta Milk and Growing Forward 2, 2015, $82,000. PI
 NSERC CREATE in Milk Quality. NSERC, 2015. $1,650,000. Co-applicant.
 Development of a bovine leukemia virus control program in Alberta. Alberta Livestock and Meat Agency, and Alberta Milk, 2015, $93,486. Co-investigator.
 NSERC Industrial Research Chair in Infectious Diseases of Dairy Cattle. Supported by Alberta Milk, Dairy Farmers of Canada, Dairy Farmers of Manitoba, BC Milk, Westgen Endowment Fund, CanWest DHI, and Canadian Dairy Network, 2014, $1,800,000. PI
 Application of laboratory assays for product efficacy studies focusing on treatment and control of Digital Dermatitis in cattle to improve animal welfare. Alberta Livestock and Meat Agency and Alberta Milk. 2014, $124,510. Co-investigator.
 A national dairy cattle health and management benchmarking study. Agriculture and Agri-Food Canada and Dairy Farmers of Canada, Dairy Cluster 2. 2013, $950,000. Co-investigator.
 Automatic milking systems: factors affecting health, productivity and welfare. Agriculture and Agri-Food Canada and Dairy Farmers of Canada, Dairy Cluster 2. 2013, $378,082. Co-investigator.
 Canadian Bovine Mastitis and Milk Quality Research Network. Agriculture and Agri-Food Canada and Dairy Farmers of Canada, Dairy Cluster 2. 2013, $1,714,722. Co-PI.
 Impact of management practices on antimicrobial resistance in bovine mastitis pathogens. Agriculture and Agri-Food Canada and Dairy Farmers of Canada, Dairy Cluster 2. 2013, $145,462 (within Canadian Bovine Mastitis and Milk Quality Research Network funding in Dairy Cluster 2). PI.
 Better animal welfare leads to improved animal health and longevity, and economic advantages to dairy producers. Agriculture and Agri-Food Canada and Dairy Farmers of Canada, Dairy Cluster 2. 2013, $630,240. Co-investigator.
 Evaluation of an alternative environmental sample collection method to detect dairy herds infected with Mycobacterium avium subspecies paratuberculosis (MAP). Canadian Agricultural Adaptation Program, and Alberta Milk, 2013, $23,300. PI.
 Broad-spectrum infrared thermography for use as an early detection method for Digital Dermatitis in dairy cattle. Canadian Agricultural Adaptation Program, and Alberta Milk, 2013, $12,500. PI.
 Effectiveness of a standardized footbath protocol in the prevention of bovine digital dermatitis on dairy farms in Alberta. Alberta Livestock and Meat Agency, and Alberta Milk, 2013, $184,000. Co-investigator.
12
 Hoofbath efficacy evaluation. DeLaval, 2013, $81,900. PI.
 Effectiveness of farm pasteurization to control horizontal transmission of Mycobacterium avium subsp. paratuberculosis. UCVM Clinical Research Grant competition, 2013, $14,970. PI.
 A translational approach to understanding and managing Primary Sclerosing Cholangitis. The Faculty of Medicine and Alberta Health Services (Calgary Zone) Emerging Research Teams Grant Program, 2011, $300,000. Co-investigator.
 The partnership between University of Calgary Faculty of Veterinary Medicine and Kerala Veterinary & Animal Sciences University to promote education, research, and knowledge transfer. Partnership Development Seed Grant, Shastri Indo-Canadian Institute, 2011, $10,000. Co-applicant.
 Integrated analysis of Mycobacterium avium subspecies paratuberculosis genotype and phenotype: identifying vaccine targets. Alberta Livestock and Meat Agency, 2011, $498,897. Co-investigator.
 Characterization of coagulase-negative staphylococcal species isolated from intramammary infections and extramammary sites on dairy farms. Agriculture Funding Consortium. 2011, $270,581. Co-investigator.
 Transmission pattern profiling of Mycobacterium avium subsp. paratuberculosis between and within Canadian dairy herds by fast and discriminating strain typing. Dairy Farmers of Canada. 2010, $94,000. PI.
 Inhalation as route of transmission for Mycobacterium avium subspecies paratuberculosis; comparison of intratracheal and aerosolized challenge. Agricultural Funding Consortium, 2010, $126,908. Co-investigator.
 Rapid identification and consequences of intramammary infection with coagulase-negative staphylococci. Agriculture and Agri-Food Canada and Dairy Farmers of Canada, Dairy Cluster 1. 2010, $149,845. PI.
 Reducing intramammary infection in free-stall housed dairy cows: interaction of post-milking standing time with cow cleanliness, lameness, and social status. Agriculture and Agri-Food Canada and Dairy Farmers of Canada, Dairy Cluster 1. 2010, $108,364. Co-investigator.
 Developing a molecular phenotype to select for robust beef cattle to reduce cost of production and improve animal health, animal welfare and food safety. Agricultural Funding Consortium, 2010, $652,050. Co-investigator.
 The influence of management practices on claw health, lameness and animal welfare on Alberta dairy farms. Alberta Livestock and Meat Agency, 2010, $158,350. Co-PI.
 Improving cow comfort to increase longevity in tie stalls and free stalls. Agriculture and Agri-Food Canada and Dairy Farmers of Canada, Dairy Cluster 1. 2010, $215,000. Co-investigator.
 Enhancing sustainable production of safe, high quality milk by optimizing dairy farm best management practices for preventing mastitis and reducing its environmental impact. Agriculture and Agri-Food Canada and Dairy Farmers of Canada, Dairy Cluster 1. 2010, $315,000. PI.
 Assessment of health, welfare and milk composition on organic and conventional dairy farms. Organic Science Cluster, 2009, $360,000. Co-PI.
13
 Reducing the incidence of mastitis in robotic milking systems through feed bunk management and design. Ontario Ministry of Agriculture, Food & Rural Affairs, New Directions & Alternative Renewable Fuels Research Program, 2009, $88,351. Co-Investigator.
 Etiology of Inflammatory Bowel Disease: gene, microbe, and environment interactions. Alberta Heritage Foundation for Medical Research, 2009, $5,000,000. Team Leader.
 Age and dose dependent susceptibility of Mycobacterium avium subsp. paratuberculosis infection in calves. Agricultural Funding Consortium, 2009, $450,514. Co-PI.
 Prevalence and contact-structure analysis for transmission of important production limiting diseases of cattle and elk in southwest Alberta. Agricultural Funding Consortium, 2009, $102,640. Co-Investigator.
 Age dependent susceptibility of Mycobacterium avium subsp. paratuberculosis infection in calves. Dairy Farmers of Canada/NSERC, 2008, $237,281. Co-PI.
 Canadian Voluntary Johne’s Disease Prevention and Control Program. Advancing Canadian Agriculture and Agri-Food program, 2008, $191,000. Co-PI (proposal submitted by the Canadian Animal Health Coalition).
 Etiology of the Inflammatory Bowel Disease: gene, microbe & environment interactions. Alberta Heritage Foundation for Medical Research, 2008, $10,000 for composing the full proposal after approval of the Letter of Intent. Team Leader.
 Prevalence of methicillin-resistant Staphylococcus aureus (MRSA) and extended-spectrum- ß-lactamase (ESBL) Escherichia coli in milk samples of cows having clinical or subclinical mastitis. Public Health Agency of Canada, 2007, $71,732. Co-PI.
 Selenium status of Maritime dairy cows and its relationship to the incidence of new intramammary infections. Atlantic Veterinary College internal competition, 2007, $10,000. Co-investigator.
 Selenium and mastitis in early lactating dairy cows. Alltech Chile, 2007, $23,000. Co-PI.
 The identification of genetic polymorphisms and protein biomarkers that are associated with susceptibility or resistance to bovine Johne’s disease. Dairy cattle genetics research and development council (DAIRYGEN) of Canadian Dairy Network, 2006, $542,000. Co-investigator.
UPEI (August, 2001 – August, 2006):
 Maritime Quality Milk – Integrated milk quality research and services for enhanced competitiveness in the regional dairy-food sector. Atlantic Innovation Fund, 2006, $4,498,310. Co-PI.
 Determination of the relationship between bacterial concentration of Mycobacterium avium subsp. paratuberculosis in bovine feces and time to detection in TREK ESP Diagnostic unit. Atlantic Veterinary College internal competition, 2006, $7350. Co-investigator.
 Presence of mastitis pathogens in culture-negative milk samples from cows with clinical mastitis. National Mastitis Research Foundation, 2006, US$15,000. PI.
 Local Support for the Canadian Bovine Mastitis Research Network. TechPEI, 2006, $170,000. Co-PI.
 Fecal survey of parasites infecting humane society animals. Sir James Dunn Animal Welfare Centre, 2005, $28,910. Co-PI.
14
 Canadian Bovine Mastitis Research Network. NSERC Research Networks, 2005, $9,312,220. Theme leader of one of the two research themes, the Monitoring theme.
 Association between antimicrobial usage in mastitis treatment and control, and antimicrobial resistance. NSERC Research Networks. Project within Canadian Bovine Mastitis Research Network, 2005, $507,910. PI.
 Validation of Neospora caninum ELISA for use in bulk tank milk samples. Atlantic Veterinary College internal competition, 2005, $5505. PI.
 The effect of intramammary antimicrobial therapy at dry-off on antimicrobial resistance in commensal fecal Escherichia coli bacteria on Quebec dairy farms. CORPAQ, 2005, $100,000. Co-PI.
 Prevalence and transmission of Giardia and Cryptosporidium at the farm level. APF project 4500609 (Health Canada and Agriculture and Agri-Food Canada), 2004, $320,000. PI.
 Efficacy of vaccination in preventing giardiasis in calves. Atlantic Veterinary College internal competition, 2004, $7485. PI.
 Role of wild canids in the epidemiology of Neospora caninum. Atlantic Veterinary College internal competition, 2004, $6746. PI.
 Estimation of sensitivity of individual and pooled fecal culture for detection of Mycobacterium avium subsp. paratuberculosis infection in dairy cattle. Dairy Farmers of Canada/NSERC, 2004, $106,510. PI.
 Assessment of the mastitis situation in Canada. Dairy Farmers of Canada/NSERC, Canadian Bovine Mastitis Research Network, 2003/2004, $209,912. PI.
 Establishment of laboratory facilities for Mycobacterium avium subsp. paratuberculosis at the Atlantic Veterinary College. Canadian Foundation for Innovation, New Opportunities, 2003, $178,079. PI.
 Zoonotic potential and transmission dynamics of Giardia and Cryptosporidium infections in domestic livestock. PEI Health Research Institute, Group Development Award, 2003, $2,500. PI.
Before start position at UPEI:
 Cohort of herds infected with paratuberculosis, Dairy Commodity Board, Ministry of Agriculture, The Netherlands, 2000-2003, $1,380,000. PI.
 Objective parameters related to chronic wasting in Dutch dairy farms, Ministry of Agriculture and Dairy Commodity Board, The Netherlands, 2000, $330,000. PI.
 Paratuberculosis in roes, Ministry of Agriculture, 2000, $35,000. Co-PI.
 Most rapid eradication of paratuberculosis in infected herds, Dairy Commodity Board, Ministry of Agriculture, The Netherlands, 2000-2002, $212,000. PI.
 Robotic milking and mastitis, European Community, 2000, $441,000. Co-investigator
 Role of Calcium in retained placenta of Friesian mares, Commission Promotion of Veterinary and Comparative Research of Animal Diseases, The Netherlands, 2000, $9,000 (supervisor). Co-PI.
 Randomized clinical trial on the efficacy of a J5-vaccine for Gram-negative mastitis, Merial, The Netherlands, 1999-2000, $55,000. PI.
15
 Epidemiology of Neospora caninum, Dairy Commodity Board, The Netherlands, 1999-2002, $640,000. Co-PI.
 Development of a bulk milk ELISA for Neospora caninum, Dairy Commodity Board, The Netherlands, 1999-2000, $64,000. Co-PI.
 Randomized clinical trial two dry cow treatments, Elanco Animal Health, The Netherlands, 1999-2000, $26,000. PI.
 Cohort study of 100 paratuberculosis-unsuspected herds, Dairy Commodity Board, Ministry of Agriculture, The Netherlands, 1999-2002, $244,000. PI.
 A new type of Salmonella typhimurium in Dutch dairy herds, Dairy Commodity Board, Ministry of Agriculture, The Netherlands, 1999-2000, $150,000. Co-PI.
 Validation of a bulk milk ELISA for Salmonella dublin, Dairy Commodity Board, Ministry of Agriculture, The Netherlands, 1999, $67,000. PI.
 Specificity of Johnine and gamma-interferon for paratuberculosis, Dairy Commodity Board, Ministry of Agriculture, The Netherlands, 1999-2000, $ 146,000. Co-PI.
 Role of viruses in the prevalence of subclinical mastitis, ID-Lelystad, 1999, $70,000. PI.
 Randomized clinical trial of two clinical mastitis treatments, Pharmacia and Upjohn, Belgium, 1999, $41,000. PI.
 Role of viruses in the incidence of clinical mastitis, ID-Lelystad, The Netherlands, 1998-1999, $50,000. PI.
 Randomized clinical trial of two clinical mastitis treatments, Intervet International, 1998-1999, $48,000. PI.
 Randomized clinical trial of two dry cow treatments, Intervet International, 1998-1999, $70,000. PI.
 Prevalence of management measures to prevent infection with paratuberculosis in Dutch cow-calf herds, Dairy Commodity Board, Ministry of Agriculture, The Netherlands, 1998-1999, $49,000. PI.
 Prevalence of management measures to prevent infection with paratuberculosis in Dutch dairy herds, Dairy Commodity Board, Ministry of Agriculture, The Netherlands, 1998-1999, $103,000. PI.
 Seroprevalence of paratuberculosis in Dutch cow-calf herds using an absorbed ELISA, Dairy Commodity Board, Ministry of Agriculture, The Netherlands, 1998-1999, $112,000. PI.
 Seroprevalence of paratuberculosis in Dutch dairy herds using an absorbed ELISA, Dairy Commodity Board, Ministry of Agriculture, The Netherlands, 1998-1999, $318.000. PI.
 Validation of an absorbed ELISA for detection of antibodies to Mycobacterium avium subsp. paratuberculosis, Dairy Commodity Board, Ministry of Agriculture, The Netherlands, 1998, $24,000. Co-PI.
 Association between heat stress and mastitis, Dairy Commodity Board, The Netherlands, 1998, $15,000. PI.
 Epidemiology of Staphylococcus aureus on low BMSCC Herds, Intervet, Dairy Commodity Board, The Netherlands, 1997-2001, $470,000. Co-PI.
 Randomized clinical trial of treatment of mastitis in early lactation, Pharmacia and Upjohn, Belgium, 1996, $66,000. PI.
16
 Association between ‘closed’ dairy farming and disease, Dairy Commodity Board, Ministry of Agriculture, The Netherlands, 1995-1999, $327,000. PI.
 Mastitis and teat-end callosity, Dutch dairy board, Dairy Commodity Board, The Netherlands, 1995-1999, $353,000. PI.
 Excretion of oxytetracycline and lugol in milk of intrauterine treated cows, Commission Promotion of Veterinary and Comparative Research of Animal Diseases, The Netherlands, 1993, $9,000 (co-investigator). Co-PI.
 Clinical mastitis in three bulk milk somatic cell count cohorts, J. Mesdag Foundation, Animal Health Service in the northern Netherlands, 1992-1998, $621,000. PI.
13. Graduate Students and Postdoctoral fellows
Future
1. Ali Naqvi. Will start September 2015, MSc, UofC. Heifer mastitis in Canadian dairy herds (co-supervised by Dr. Jeroen De Buck, bacteriologist UCVM).
2. Liu Gang. Will start September 2015, MSc, Beijing Agricultural University visiting graduate student.
3. Mark Lowerison. Will start September 2015, PhD, UofC. Biostatistical analysis of large health datasets (co-supervised by Dr. Rob Deardon, biostatistician UCVM).
4. Diego Borin Nobrega. Will start January 2015, PhD, UofC. Antimicrobial resistance of coagulase-negative staphylococci (co-supervised by Dr. Jeroen De Buck, bacteriologist UCVM).
5. Ana Paula Alves Monteiro. Will start January 2015, PhD, UofC. Inhibition of major udder pathogens by coagulase-negative staphylococci (co-supervised by Dr. Jeroen De Buck, bacteriologist UCVM).
Current
1. Domonique Carson. Started in September 2014, MSc, UofC. Inhibition of growth and intramammary infection of major pathogens by coagulase-negative staphylococci (co-supervised by Dr. Jeroen De Buck, bacteriologist UCVM).
2. Ana Bras. Started in September 2013, MSc, UofC. Expected to defend September 2015. Mycoplasma bovis in farmed bison: Analysis of the epidemiology of an emerging bison pathogen (co-supervisor; Dr. Claire Windeyer is supervisor).
3. Amanda Mirto. Started in September 2013, MSc, UofC. Expected to defend December 2015. Development of a marked live attenuated Johne’s disease vaccine strain (co-supervisor; Dr. Jeroen De Buck, bacteriologist UCVM is supervisor).
4. Carolina Ritter. Started in September 2013, PhD, UofC. Motivation of farmers to participate in Johne’s disease prevention and control programs (co-supervised by Dr. Cindy Adams, professor UCVM).
5. Caroline Corbett. Started in September 2013, MSc, UofC. Calf-to-calf transmission of Mycobacterium avium subsp. paratuberculosis (co-supervised by Dr. Jeroen De Buck, bacteriologist UCVM).
17
6. Bayan Missaghi. Started in March 2013, MSc, UofC. The role of pathogenic bacteria in Crohn’s disease (co-supervised by Dr. Subrata Ghosh, gastroenterologist and immunologist UofC).
7. Casey Jacobs. Started in February 2013, PhD, UofC. Footbaths and digital dermatitis.
8. Larissa Condas. Started in January 2013, MSc, UofC. Expected to defend November 2015. The role of coagulase-negative staphylococci in bovine mastitis (co-supervised by Dr. Jeroen De Buck, bacteriologist UCVM).
9. Laura Solano. Started in February 2011, PhD, UofC. Expected to defend January 2016. Lameness in Alberta dairy herds (co-supervisor; Dr. Karin Orsel, epidemiologist of infectious diseases UCVM is supervisor).
Defended
1. Christina Ahlstrom. 2011-2015, PhD, UofC. The Genomic Diversity and Molecular Epidemiology of Mycobacterium avium subsp. paratuberculosis in Canadian dairy cattle
2. Robert Wolf. 2010-2014, PhD, UofC. Control of Mycobacterium avium subspecies paratuberculosis on Western Canadian dairy farms; prevalence, diagnostics and risk factors
3. Rienske Mortier. 2009-2014, PhD, UofC. Age- and dose-dependent susceptibility to Mycobacterium avium subsp. paratuberculosis in dairy calves
4. Maria Negron. 2010-2014, PhD, UofC. Non-medical reasons for colectomy among ulcerative colitis patients
5. Joel David. 2011-2013, MSc, UofC. Gene expression study of Mycobacterium avium subspecies paratuberculosis infected cows – “A road to identify transcripts that could serve as biomarkers for early diagnosis of Johne’s disease”
6. Praseeda Ajitkumar. 2009-2012, MSc, UofC. Molecular techniques for the identification of bovine mastitis pathogens
7. Andrea Wasko. 2007-2012, MSc, University of Calgary. Equine lung inflammation in Alberta: Evaluation of clinical signs, risk-screening questionnaire, and bronchoalveolar lavage in recurrent airway obstruction and inflammatory airway disease
8. Vineet Saini. 2007-2011, PhD, University of Calgary. Association between antimicrobial use and antimicrobial resistance in bovine mastitis pathogens
9. Jan Lievaart. 2004-2010, PhD, Utrecht University. Somatic cells counts in dairy herds
10. Alejandro Ceballos. 2005 – 2010, PhD, UPEI. Selenium supplementation in cattle: transfer to milk and udder health
11. Sofie Piepers. 2006 – 2010, PhD, Ghent University, Belgium. Udder health of dairy heifers in early lactation: risk factors at the herd-, heifer-, and quarter- level, and the impact on performance during first lactation
12. Otlis Sampimon. 2004 – 2009, PhD, Utrecht University, The Netherlands. Coagulase-negative staphylococci mastitis in Dutch dairy herds
13. Richard Olde Riekerink. 2003 – 2007, PhD, UPEI. Assessment of the mastitis situation in Canada
14. Fabienne Uehlinger. 2003 – 2007, PhD, UPEI. Prevalence and zoonotic potential of Giardia duodenalis in cattle and dogs
15. Wendela Wapenaar. 2003 – 2006, PhD, UPEI. Epidemiology of Neospora caninum in dairy cattle and wild canids on Prince Edward Island
18
16. Shawn McKenna. 2001- 2005, PhD, UPEI. Detection of bovine paratuberculosis
17. Zhiying Zhang. 2002 – 2005, MSc, UPEI. Use of bioactive compounds to preserve boar sperm
18. Francesca Neijenhuis. 1997 – 2004, PhD, Utrecht University, The Netherlands. Teat condition in dairy cows
19. Mello Sevinga. 1999 – 2004, PhD, Utrecht University, The Netherlands. Retained placenta in Friesian horses
20. Sarne de Vliegher. 2000 – 2004, PhD, Ghent University, Belgium. Udder health in dairy heifers. Some epidemiological and microbiological aspects
21. Jan Veling. 1998 – 2004, PhD, Utrecht University, The Netherlands. Diagnosis and control Salmonella Dublin infections on Dutch dairy farms
22. Kees Kalis. 1998 – 2003, PhD, Utrecht University, The Netherlands. Diagnosis and control of paratuberculosis in dairy herds
23. Yvette de Haas. 1999 – 2003, PhD, Wageningen University, The Netherlands. Genetics of bovine mastitis and somatic cell count
24. Jan Sol. 1997 – 2002, PhD, Utrecht University, The Netherlands. Cure of Staphylococcus aureus mastitis in Dutch dairy cows
25. Thomas Dijkstra. 1999 – 2002, PhD, Utrecht University, The Netherlands. Horizontal and vertical transmission of Neospora caninum
26. Ruth Zadoks. 1997 – 2002, PhD, Utrecht University, The Netherlands (with distinction). Molecular and mathematical epidemiology of Staphylococcus aureus and Streptococcus uberis mastitis in dairy herds
Postdoctoral fellows
1. Helen Becker. 2013 – 2015, UofC. The role of microbial infection in Crohn’s disease.
2. Vineet Saini. 2011 – 2013, UofC. Epidemiology of infectious diseases.
3. Ajitkumar Gopinathamenon. 2009 – 2010, UofC. An epidemiologic analysis of the incidence and causes of culling in Alberta beef bulls
19
Graduate and examination committees
Student
Year
Program
Graduate committee
Comprehensive or Candidacy exam
Examination committee
Ebo Budu-Amoako1
06-11
PhD
X
Tatjana Coklin2
05–07
MSc
X
Elmabrok Masaoud1
04–06
PhD
X
Tim Burnley1
04–06
MSc
X (chair)
Nicole O’Brien1
04–06
MSc
X (chair)
Linda Waite1
2004
MSc
X
Pascale Nerette1
2004
PhD
X
Christine MacWilliams1
03–09
MSc
X
Carolyn Sanford1
02–05
PhD
X
X
Fortune Sithole1
02–05
PhD
X
X
X
Sarah Purcell1
02–06
PhD
X
Pipat Arunvipas1
2003
PhD
X
Vicky Benson1
2003
PhD
X
Joao Paulo Haddad1
2003
PhD
X
X
Aboubakar Mounchili1
2003
PhD
X
Ashwani Tiwari1
2003
PhD
X
X
Liza Rosenbaum-Nielsen3
2003
PhD
X
Åse Margrethe Sogstadt4
2006
PhD
X
Roberta Lea McCombie5
2007
PhD
X
Simon Dufour6
07-11
PhD
X
X
Chris Bartels7
2007
PhD
X
Suvi Taponen8
2008
PhD
X
Byron Weckworth5
08-12
PhD
X
X
X
Pieter Passchyn9
2008-
PhD
X
Carrie Lavers1
09-14
PhD
X
Patricia Curry5
08-12
PhD
X
Oudesso Kerro Dego10
2009
PhD
X
Natalie Molodecky5
09-11
MSc
X
X
Matthieu Pruvot5
09-14
PhD
X
X
X
Fox Underwood5
10-13
MSc
X
X
X
Vanessa Oliver5
2010
MSc
X
Christopher Luby10
2010
PhD
X
Kaiyu Wu5
2011
PhD
X
Susanne Eisenberg7
2011
PhD
X
20
Guilherme Bond5
2011-
PhD
X
X
Barbara Wolfger5
11-15
PhD
X
X
X
Yasmeen Khalil5
11-13
MSc
X
X
Jesse Invik5
11-15
PhD
X
X
Kristen Reti5
12-14
MSc
X
X
Kristin Eccles5
12-14
MSc
X
X
Alysha Rusk5
2014-
MSc
X
Sarah Akierman5
2015
MSc
X
Jason Jiang5
2015
MSc
X
1University of Prince Edward Island; 2University of Ottawa; 3University of Copenhagen, Denmark; 4Norwegian Veterinary School, Oslo, Norway; 5University of Calgary; 6University of Montreal; 7Utrecht University, The Netherlands; 8University of Helsinki, Finland; 9Ghent University, Belgium; 10University of Saskatchewan.
In addition, I have chaired many thesis defenses and candidacy exams as a neutral chair.
14. Publications
Graduate students of Dr. Barkema are printed in bold.
Every underlined authorship reflects senior authorship position.
H-index Web of Science: 45
Refereed Journals:
1. B. Wolfger, E. Timsit, E. A. Pajor, N. Cook, H.W. Barkema, and K. Orsel. 2015. Technical Note: Accuracy of an ear tag-attached accelerometer to monitor rumination and feeding behavior in feedlot cattle. J Anim Sci 93:3164-3168.
2. R. Wolf, K. Orsel, J. De Buck, and H.W. Barkema. 2015. Calves shedding Mycobacterium avium subspecies paratuberculosis are common on infected dairy farms. Vet Res 46:71.
3. C. Ahlstrom, H.W. Barkema, K. Stevenson, R.N. Zadoks, R. Biek, R. Kao, H. Trewby, D. Haupstein, D.F. Kelton, G. Fecteau, O. Labrecque, G.P. Keefe, S.L.B. McKenna, and J. De Buck. 2015. Limitations of variable number of tandem repeat typing identified through whole genome sequencing of Mycobacterium avium subsp. paratuberculosis on a national and herd level. BMC Genomics 16:161.
4. H.M. Becker, D. Grigat, S. Ghosh, G.G. Kaplan, L.A. Dieleman, E. Wine, R.N. Fedorak, A. Fernandes, R. Panaccione, and H.W. Barkema. 2015. Living with inflammatory bowel disease: A Crohn’s and Colitis Canada survey. Can J Gastroenterol Hepatol 29:77- 84.
5. S. Coward, S.J. Heitman, F. Clement, M. Negron, R. Panaccione, S. Ghosh, H.W. Barkema, C. Seow, Y. Leung, and G.G. Kaplan. 2015. Funding a smoking cessation program for Crohn’s disease: An economic evaluation. Am J Gastroenterol 110:368–377. 6. Y.P.Y. Leung, G.G. Kaplan, S. Coward, D. Tanyingoh, B.J. Kaplan, D.W. Johnston, H.W. Barkema, S. Ghosh, R. Panaccione, and C.H. Seow. 2015. Intrapartum corticosteroid use
21
significantly increases the risk of gestational diabetes in women with Inflammatory Bowel Disease. J Crohn’s Colitis 9: 223-230.
7. B. Wolfger, B.J. Manns, H.W. Barkema, K.S Schwartzkopf-Genschwein, C. Dorin, and K. Orsel. 2015. Evaluating the cost implications of a radio frequency identification feeding system for early detection of Bovine Respiratory Disease in feedlot cattle. Prev Vet Med. 118:285-292.
8. J. Detilleux, J.P. Kastelic, and H.W. Barkema. 2015. Mediation analysis to estimate direct and indirect milk losses due to clinical mastitis in cattle. Prev Vet Med 118:449-456.
9. B. Wolfger, K.S. Schwartzkopf-Genswein, R. Silasi, H.W. Barkema, E.A. Pajor, M. Levy, and K. Orsel. 2015. Feeding behavior as early disease predictor of bovine respiratory disease in North American feedlot systems. J Anim Sci 93:377-385.
10. R. Wolf, H.W. Barkema, J. De Buck, and K. Orsel. 2015. Sampling location, herd size and season influence Mycobacterium avium ssp. paratuberculosis environmental culture results. J Dairy Sci 98:275-287.
11. J. De Buck, R. Shaykhutdinov, H.W. Barkema, and H.J. Vogel. 2014. Metabolomic profiling in cattle experimentally infected with Mycobacterium avium subsp. paratuberculosis. PLoS One 9: e111872.
12. M. Pruvot, S. Kutz, H.W. Barkema, J. De Buck, and K. Orsel. 2014. Occurrence of Mycobacterium avium subspecies paratuberculosis and Neospora caninum in Alberta cow-calf operations. Prev Vet Med 117:95-102.
13. M.E. Negrón, G.G. Kaplan, H.W. Barkema, B. Eksteen, F. Clement, B.J. Manns, S. Coward, S. Ghosh, and S.J. Heitman. 2014. Colorectal cancer surveillance in patients with inflammatory bowel disease and primary sclerosing cholangitis: an economic evaluation. Inflamm Bowel Dis 20:2046-2055.
14. J. David, H.W. Barkema, L. Luo Guan, and J. De Buck. 2014. Gene-expression profiling of calves 6 and 9 months after inoculation with Mycobacterium avium subspecies paratuberculosis. Vet Res 45:96.
15. R.A.R. Mortier, H.W. Barkema, T.A. Wilson, T.T. Sajobi, R. Wolf, and J. De Buck. 2014. Dose-dependent interferon-gamma release in dairy calves experimentally infected with Mycobacterium avium subspecies paratuberculosis. Vet Immunol Immunopathol 161:205-210.
16. R. Wolf, H.W. Barkema, J. De Buck, M. Slomp, J. Flaig, D. Haupstein, C. Pickel, and K. Orsel. 2014. High herd-level prevalence of Mycobacterium avium subspecies paratuberculosis in Western Canadian dairy herds, based on environmental sampling. J Dairy Sci 97:6250-6259.
17. R.A.R. Mortier, H.W. Barkema, K. Orsel, R. Wolf, M.E. Negron, G.A. Atkins, and J. De Buck. 2014. Antibody response early after experimental infection with Mycobacterium avium subspecies paratuberculosis in dairy calves. J Dairy Sci. 97:5558-5565.
18. M.E. Negrón, H.W. Barkema, K.P. Rioux, J. De Buck, S. Checkley, M.-C. Proulx, A. Frolkis, P.L. Beck, L. Dieleman, R. Panaccione, S. Ghosh, and G.G. Kaplan. 2014. Clostridium difficile infection worsens the prognosis of ulcerative colitis. Can J Gastroenterol Hepatol 28:373-380.
19. R.A.R. Mortier, H.W. Barkema, K. Orsel, R. Wolf, and J. De Buck. 2014. Shedding patterns of dairy calves experimentally infected with Mycobacterium avium subspecies paratuberculosis. Vet Res 45:71.
22
20. E. Cresswell, M. Brennan, H.W. Barkema, and W. Wapenaar. 2014. A questionnaire-based survey on the uptake and use of cattle vaccines in the UK. Vet Rec Open 1:e000042.
21. B. Missaghi, H.W. Barkema, K.L. Madsen, and S. Ghosh. 2014. Perturbation of the human microbiome as a contributor to inflammatory bowel disease. Pathogens 3:549-562.
22. S.Y. Salim, J. Jovel, E. Wine, G.G. Kaplan, R. Vincent, A. Thiesen, H.W. Barkema, and K.L. Madsen. 2014. Exposure to ingested airborne pollutant particulate matter increases mucosal exposure to bacteria and induces early onset of inflammation in neonatal IL-10 deficient mice. Inflamm Bowel Dis 20:1129-1138.
23. J. David, H.W. Barkema, R. Mortier, S. Ghosh, L. Luo Guan, and J. De Buck. 2014. Gene expression profiling and putative biomarkers of calves 3 months after infection with Mycobacterium avium subspecies paratuberculosis. Vet Immunol Immunopathol 160:107-117.
24. M.E.A. Watters, H.W. Barkema, K.E. Leslie, M.A.G. von Keyserlingk, and T.J. DeVries. 2014. Relationship between postmilking standing duration and risk of intramammary infection in free-stall housed dairy cows milked 3 times per day. J Dairy Sci 97:3456–3471.
25. A. Ueno, H. Jijon, S. Traves, R. Chan, K. Ford, P.L. Beck, M. Iacucci, M. Fort Gasia, H.W. Barkema, R. Panaccione, G.G. Kaplan, D. Proud, and S. Ghosh. 2014. Opposing effects of smoking in ulcerative colitis and Crohn’s disease may be explained by differential effects on dendritic cells. Inflamm Bowel Dis 20:800-810.
26. R. Wolf, F. Clement, H.W. Barkema, and K. Orsel. 2014. Economic evaluation of participation in a voluntary Johne’s disease prevention and control program from a farmer’s perspective – The Alberta Johne’s Disease Initiative. J Dairy Sci 97:2822-2834.
27. G.W. Moran, M.F. Dubeau, G.G. Kaplan, H. Yang H, C.H. Seow, R.N. Fedorak, L.A. Dieleman, H.W. Barkema, S. Ghosh, and R. Panaccione. 2014. Phenotypic features of Crohn’s disease associated with failure of medical treatment. Clin Gastroenterol Hepatol 12:434-442.
28. M. Pruvot, S. Kutz, F. van der Meer, M. Musiani, H.W. Barkema, and K. Orsel. 2014. Pathogens at the livestock-wildlife interface in Western Alberta: does transmission route matter? Vet Res 45:18.
29. C. Ahlstrom, H.W. Barkema, and J. De Buck. 2014. Improved short-sequence-repeat genotyping of Mycobacterium avium subspecies paratuberculosis by using matrix-assisted laser desorption ionization-time of flight mass spectrometry. Appl Environm Microbiol 80:534-539.
30. C. Lavers, H.W. Barkema, I.R. Dohoo, and S.L.B. McKenna, and G.P. Keefe. 2014. Evaluation of milk ELISA for detection of Mycobacterium avium subspecies paratuberculosis in dairy herds and association with within-herd prevalence. J Dairy Sci 97:299-309.
31. J.C. Zaffino Heyerhoff, S.J. LeBlanc, T.J. DeVries, C.G.R. Nash, J. Gibbons, K. Orsel, H.W. Barkema, L. Solano, J. Rushen, A.M. de Passillé, and D.B. Haley. 2014. Prevalence of and factors associated with hock, knee, and neck injuries on dairy cows in free-stall housing in Canada. J Dairy Sci 97:173-184.
32. L.A.Z. Condas, M.G. Ribeiro, K. Yazawa, A.C. Vargas, T. Salerno, R. Giuffrida, H. Langoni, P.A. Melville, S. Biesdorf, T. Matsuzama, T. Gonoi, J.P. Kastelic, and H.W. Barkema. 2013. Molecular identification and drug susceptibility pattern of Nocardia spp. isolated from bovine mastitis in Brazil. Vet Microbiol. 167:708-712.
23
33. C. Lavers, S.L.B. McKenna, I.R. Dohoo, H.W. Barkema, and G.P. Keefe. 2013. Evaluation of environmental fecal culture for Mycobacterium avium subspecies paratuberculosis detection in dairy herds and association with apparent within-herd prevalence. Can Vet J 54:1053-1060.
34. A. Ueno-Yamanouchi, H. Jijon, R. Chan, K. Ford, C. Hirota, G.G. Kaplan, P.L. Beck, M. Iacucci, M. Fort Gasia, H.W. Barkema, R. Panaccione, and S. Ghosh. 2013. Increased prevalence of circulating novel IL-17 secreting Foxp3 expressing CD4+ T cells and defective suppressive function of circulating Foxp3+ regulatory cells support plasticity between Th17 and regulatory T cells in inflammatory bowel disease patients. Inflamm Bowel Dis 19:2522-2534.
35. A. Frolkis, J. Dykeman, M.E. Negrón, J. deBruyn, N. Jette, K.M. Fiest, T. Frolkis, H.W. Barkema, K.P. Rioux, R. Panaccione, S. Ghosh, S. Wiebe, and G.G. Kaplan. 2013. Risk of surgery for the inflammatory bowel diseases has decreased over time: A systematic review and meta-analysis of population-based studies. Gastroenterology 145:996-1006.
36. R.A.R. Mortier, H.W. Barkema, K. Orsel, R. Wolf, G.A. Atkins, J. Bystrom, O. Illanes, J. De Buck. 2013. Evaluation of age-dependent susceptibility in calves infected with two doses of Mycobacterium avium subspecies paratuberculosis using pathology and tissue culture. Vet Res 44:94.
37. F.D. Uehlinger, S.J. Greenwood, J T. McClure, G.A. Conboy, R.M. O’Handley, and H.W. Barkema. 2013. Zoonotic potential of Giardia duodenalis and Cryptosporidium spp. and prevalence of intestinal parasites in young dogs from different populations on Prince Edward Island, Canada. Vet Parasitol 196:509-514.
38. M.E.A. Watters, K.M.A. Meijer, H.W. Barkema, K.E. Leslie, M.A.G. von Keyserlingk, and T.J. DeVries. 2013. Associations of herd- and cow-level factors, cow lying behavior, and risk of elevated somatic cell count in free-stall housed lactating dairy cows. Prev Vet Med. 111:245-255.
39. V. Saini, J T. McClure, D.T. Scholl, T.J. De Vries, and H.W. Barkema. 2013. Herd-level association between antimicrobial use and presence or absence of antimicrobial resistance in Gram-negative bovine mastitis pathogens on Canadian dairy farms. J Dairy Sci. 96:4965–4976.
40. H.W. Barkema, S. De Vliegher, S. Piepers, and R.N. Zadoks. Herd level approach to high bulk milk somatic cell count problems. Vet Q 33:82-93.
41. L. Kish, N. Hotte, G.G. Kaplan, R. Vincent, R. Tso, M. Gänzle, K.P. Rioux, A. Thiesen, H.W. Barkema, E. Wine, and K. Madsen. 2013. Environmental particulate matter induces murine intestinal inflammatory responses and alters the gut microbiome. PLoS ONE 8: e62220.
42. W. Wapenaar, H.W. Barkema, and R.M. O’Handley. 2013. Fecal shedding of Toxocara canis and other parasites in foxes and coyotes on Prince Edward Island, Canada. J Wildl Dis 49:394-397.
43. A. Frolkis, L.A. Dieleman, H.W. Barkema, R. Panaccione, S. Ghosh, R. Fedorak, K. Madsen, and G.G. Kaplan. 2013. Environment and the inflammatory bowel diseases. Can J Gastroenterol 27:e18-e24.
44. P. Ajitkumar, H.W. Barkema, Ruth N. Zadoks, Douglas W. Morck, F.J.U.M. van der Meer, and J. De Buck. 2013. High-resolution melt analysis for species identification of coagulase-negative staphylococci derived from bovine milk. Diagn Microbiol Infect Dis 75:227-234.
24
45. W. Wapenaar, H.W. Barkema, and R.M. O’Handley. 2012. Population structure of harvested wild foxed (Vulpes vulpes) and coyotes (Canis latrans) on Prince Edward Island, Canada. Can Field Naturalist 126:288-294.
46. T.J. DeVries, M. Aardoudse, H.W. Barkema, K.E. Leslie, and M.A.G. Keyserlingk. 2012. Associations of dairy cow behavior, barn hygiene, cow hygiene, and risk of elevated somatic cell count. J Dairy Sci 95:5730-5739.
47. R.G.M. Olde Riekerink, I. Ohnstadt, and B. van Santen, and H.W. Barkema. 2012. Effect of an automated dipping and backflushing system on somatic cell counts. J Dairy Sci 95:4931-4938.
48. V. Saini, J T. McClure, D. Léger, G.P. Keefe, D.T. Scholl, D.M. Morck, and H.W. Barkema. 2012. Antimicrobial resistance profiles of common mastitis pathogens on Canadian dairy farms. J Dairy Sci 95:4319-4332.
49. E. Budu-Amoako, S.J. Greenwood, B.R. Dixon, L. Sweet, L. Ang, H.W. Barkema, and J T. McClure. 2012. Molecular epidemiology of Cryptosporidium and Giardia species in humans on Prince Edward Island, Canada: evidence of zoonotic transmission from cattle. Zoonoses Public Health 59:424-433.
50. I.S. Soon, N.A. Molodecky, D.M. Rabi, W.A. Ghali, H.W. Barkema, and G.G. Kaplan. 2012. The relationship between urban environment and the inflammatory bowel diseases: a systematic review and meta-analysis. BMC Gastroenterol. 12:51.
51. S. Dufour, I.R. Dohoo, H.W. Barkema, L. DesCôteaux, T.J. DeVries, K.K. Reyher, J.-P. Roy, and D.T. Scholl. 2012. Epidemiology of coagulase-negative staphylococci intramammary infection in dairy cattle and the effect of bacteriological culture misclassification. J Dairy Sci. 95:3110-3124.
52. E. Budu-Amoako, S.J. Greenwood, B.R. Dixon, H.W. Barkema, and J T. McClure. 2012. Giardia and Cryptosporidium on dairy farms and the role these farms may play in contaminating source water in Prince Edward Island, Canada. J Vet Int Med. 26:668-673.
53. I. Ohnstad, R.G.M. Olde Riekerink, P. Hogewerf, K. de Koning, and H.W. Barkema. 2012. Short Communication: Impact of automatic post-milking teat disinfection and cluster flushing on the milking work routine. J Dairy Sci 95:2567-2570.
54. V. Saini, J T. McClure, D.T. Scholl, T.J. De Vries, and H.W. Barkema. 2012. Herd-level association between antimicrobial use and antimicrobial resistance in bovine mastitis Staphylococcus aureus isolates on Canadian dairy farms. J Dairy Sci 95:1921-1929.
55. S. De Vliegher, L.K. Fox., S. Piepers, S. McDougall, and H.W. Barkema. 2012. Invited review: Mastitis in dairy heifers: Nature of the disease, potential impact, prevention, and control. J Dairy Sci 95:1025-1040.
56. V. Saini, J T. McClure, D. Léger, S. Dufour, A.G. Sheldon, D.T. Scholl, and H.W. Barkema. 2012. Antimicrobial use on Canadian dairy farms. J Dairy Sci 95:1209-1221.
57. S. Dufour, I.R. Dohoo, H.W. Barkema, L. DesCôteaux, T.J. DeVries, K.K. Reyher, J.-P. Roy, and D. T. Scholl. 2012. Manageable risk factors associated with the lactational incidence, elimination, and prevalence of Staphylococcus aureus intramammary infections in dairy cows. J Dairy Sci 95:1283-1300.
58. P. Ajitkumar, H.W. Barkema, and J. De Buck. 2012. Rapid identification of bovine mastitis pathogens by high-resolution melt analysis of 16S rDNA sequences. Vet Microbiol. 155:332-340.
25
59. E. Budu-Amoako, S.J. Greenwood, B.R. Dixon, H.W. Barkema, D. Hurnik, C. Estey, and J T. McClure. 2012. Occurrence and molecular characterization of Giardia and Cryptosporidium in pigs on Prince Edward Island, Canada. Vet Parasitol. 184:18-24.
60. E. Budu-Amoako, S.J. Greenwood, B.R. Dixon, H.W. Barkema, and J T. McClure. 2012. Occurrence of Giardia and Cryptosporidium on beef farms and water sources within the vicinity of the farms on Prince Edward Island, Canada. Vet Parasitol. 184:1-9.
61. A. Ceballos-Marquéz, H.W. Barkema, H. Stryhn, I.R. Dohoo, G.P. Keefe, and J.J. Wichtel. 2012. Bulk tank milk selenium concentration and its association with milk production parameters in Canadian dairy herds. Can Vet J 53:51-56.
62. N. Molodecky, I. Soon, D. Rabi, W. Ghali, M. Ferris, G. Chernoff, E. Benchimol, R. Panaccione, S. Ghosh, H.W. Barkema, and G.G. Kaplan. 2012. Increasing incidence and prevalence of the inflammatory bowel diseases with time, based on systematic review. Gastroenterology 142:46-54.
63. E. Budu-Amoako, S.J. Greenwood, B.R. Dixon, H.W. Barkema, and J T. McClure. 2011. Foodborne illness associated with Cryptosporidium and Giardia from livestock. J Food Prot 74:1944-1955.
64. A.G. Menon, H.W. Barkema, R. Wilde, J.P. Kastelic, and J.C. Thundathil. 2011. Association between sperm abnormalities, breed, age and scrotal circumference in beef bulls. Can J Vet Res 75:241-247.
65. F.D. Uehlinger, S.J. Greenwood, R.M. O’Handley, J.T. McClure, T. Coklin, B.R. Dixon, M. De Boer, H. Zwiers, and H.W. Barkema. 2011. Prevalence and genotypes of Giardia duodenalis in dairy and beef cattle on Prince Edward Island, Canada. Can Vet J 52:967–972.
66. T.J. DeVries, J.A. Deming, K.E. Leslie, J. Rodenburg, G. Seguin, and H.W. Barkema. 2011. Association of standing and lying behavior patterns and incidence of intramammary infection in dairy cows milked with an automated system. J Dairy Sci 94:3845-3855.
67. N. Molodecky, R. Panaccione, S. Ghosh, H.W. Barkema, and G.G. Kaplan. 2011. Challenges associated with identifying the environmental determinants of the inflammatory bowel diseases. Inflamm Bowel Dis 17:1792-1799.
68. N.A. Molodecky, H. Kareemi, R. Parab, H.W. Barkema, H. Quan, R.P. Myers, and G.G. Kaplan. 2011. Incidence of Primary Sclerosing Cholangitis: A systematic review and meta-analysis. Hepatology 53:1590-1599.
69. A.G. Menon, J.C. Thundathil, R. Wilde, J.R. Kastelic, and H.W. Barkema. 2011. Validating the accuracy of bull sperm morphology analysis by veterinary practitioners. Can Vet J 52:407-408.
70. S. Piepers, K. Peeters, G. Opsomer, H.W. Barkema, K. Frankena, and S. De Vliegher. 2011. Pathogen group specific risk factors at herd, heifer and quarter levels for intramammary infections in early lactating dairy heifers. Prev Vet Med 99:91-101.
71. N.A. Molodecky, R.P. Myers, H.W. Barkema, H. Quan, and G.G. Kaplan. 2011. Validity of administrative data for the diagnosis of primary sclerosing cholangitis: a population-based study. Liver Intern 31:712-720.
72. V. Saini, R.G.M. Olde Riekerink, J T. McClure, and H.W. Barkema. 2011. Diagnostic accuracy assessment of Sensitre and Agar Disk Diffusion for determining antimicrobial resistance profiles of bovine clinical mastitis pathogens. J Clin Microbiol 49:1568-1577.
26
73. A. Wasko, H.W. Barkema, J. Nicol, N. Fernandez, N. Logie, and R. Léguillette. 2011. Evaluation of a risk-screening questionnaire to detect equine lung inflammation: Results of a large field study. Equine Vet J 43:145-152.
74. K.K. Reyher, S. Dufour, H.W. Barkema, L. Des Côteaux, T.J. DeVries, I.R. Dohoo, G.P. Keefe, J.-P. Roy, and D.T. Scholl. 2011. The National Cohort of Dairy Farms – A data collection platform for mastitis research in Canada. J Dairy Sci 94:1616-1626.
75. J.J. Lievaart, W.D.J. Kremer, J.K. Reneau, and H.W. Barkema. 2011. The influence of sampling interval on the accuracy of predicting bulk milk somatic cell count. J Dairy Sci 94:804-807.
76. S. Dufour, A. Frechette, H.W. Barkema, A. Mussell, and D.T. Scholl. 2011. Invited review: Impact of udder health management practices on herd somatic cell count. J Dairy Sci. 94:563-579.
77. K. Plozza, J. Lievaart, G. Potts, and H.W. Barkema. 2011. Subclinical mastitis and associated risk factors on New South Wales dairy farms. Aust Vet J 89:41-46.
78. W. Steeneveld, T. van Werven, H.W. Barkema, and H. Hogeveen. 2011. Cow-specific treatment of clinical mastitis: An economic approach. J Dairy Sci 94:174-188.
79. R.G.M. Olde Riekerink, H.W. Barkema, D.T. Scholl, D.E. Poole, and D.F. Kelton. 2010. Management practices associated with the bulk-milk prevalence of Staphylococcus aureus in Canadian dairy farms. Prev Vet Med 97:20-28.
80. A. Ceballos, H.W. Barkema, H. Stryhn, I.R. Dohoo, G.P. Keefe, and J.J. Wichtel. 2010. Milk selenium concentration and its association with udder health in Atlantic Canadian dairy herds. J Dairy Sci 93:4700-4709.
81. A. Ceballos, H.W. Barkema, H. Stryhn, J.J. Wichtel, J. Neumann, A. Mella, J. Kruze, M.S. Espindola, and F. Wittwer. 2010. The effect of selenium supplementation before calving on early-lactation udder health in pastured dairy heifers. J Dairy Sci 93:4602-4612.
82. O. Sampimon, B.H.P. van den Borne, I. Berends, H.W. Barkema, and T.J.G.M. Lam. 2010. The effect of coagulase-negative staphylococci on somatic cell count in Dutch dairy herds. J Dairy Res 77:318-324.
83. S. Dufour, S., H.W. Barkema, L. DesCôteaux, T.J. DeVries, I.R. Dohoo, K. Reyher, J.P. Roy, and D.T. Scholl. 2010. Development and validation of a bilingual questionnaire for measuring udder health related management practices on dairy farms. Prev Vet Med 95:74-85.
84. S. Piepers, G. Opsomer, H.W. Barkema, A. de Kruif, and S. De Vliegher. 2010. Heifers infected with coagulase-negative staphylococci in early lactation have fewer cases of clinical mastitis and a higher milk production in their first lactation than non-infected heifers. J Dairy Sci 93:2014-2024.
85. A. Ceballos, J. Kruze, H.W. Barkema, I. Dohoo, J. Sanchez, D. Uribe, J.J. Wichtel, and F. Wittwer. 2010. Barium selenate supplementation and its effect on intramammary infections in pasture-based dairy cows. J Dairy Sci 93:1468-1477.
86. W. Steeneveld, L.C. van der Gaag, H.W. Barkema, and H. Hogeveen. 2010. Simplify the interpretation of alert lists for clinical mastitis in automatic milking systems. Comput Electron Agric 71:50-56.
87. F.J.U.M. van der Meer, K. Orsel, and H.W. Barkema. 2010. The new influenza A H1N1 virus: balancing on the interface of humans and animals. Can Vet J 51:56-62.
27
88. J.L. Lievaart, H.W. Barkema, J.A.P. Heesterbeek, J. van den Broek, and W.D.J. Kremer. 2010. Prediction of the herd somatic cell count of the consecutive month using a linear mixed effect model. J Dairy Sci 93:234-241.
89. J.L. Lievaart, H.W. Barkema, H. Hogeveen, and W.D.J. Kremer. 2009. Reliability of the bulk milk somatic cell count as an indication of the average herd somatic cell count. J Dairy Res 76:490-496.
90. H.W. Barkema, M.J. Green, A.J. Bradley, and R.N. Zadoks. 2009. Invited review: The role of contagious disease in udder health. J Dairy Sci 92:4717-4729.
91. S. Piepers, G. Opsomer, E. Meyer, K. Demeyere, H.W. Barkema, A. de Kruif, and S. De Vliegher. 2009. Heifer and quarter characteristics associated with periparturient blood and milk neutrophil apoptosis in healthy heifers and in heifers with subclinical mastitis. J Dairy Sci 92:4330–4339.
92. O.C. Sampimon, S. de Vliegher, H.W. Barkema, J. Sol, and T.J.G.M. Lam. 2009. Effect of prepartum dry cow antibiotic treatment in dairy heifers on udder health and milk production. J Dairy Sci 92:4395-4403.
93. W. Steeneveld, L.C. van der Gaag, H.W. Barkema, and H. Hogeveen. 2009. Providing probability distributions for the causal pathogen of clinical mastitis using naive Bayesian networks. J Dairy Sci 92:2598-2609.
94. O.C. Sampimon, R.N. Zadoks, S. de Vliegher, K. Supré, F. Haesebrouck, H.W. Barkema, J. Sol, and T.J.G.M. Lam. 2009. Performance of Api Staph ID 32 and Staph-Zym for identification of coagulase-negative staphylococci isolated from bovine milk samples. Vet Microbiol 136:300-305.
95. T. Coklin, F.D. Uehlinger, J.M. Farber, H.W. Barkema, R.M. O’Handley, and B.R. Dixon. 2009. Prevalence and molecular characterization of Cryptosporidium spp. in dairy calves from 11 farms in Prince Edward Island, Canada. Vet Parasitol 160:323-326.
96. M.T. Koskinen, L. Salmikivi, S. Pyörälä, A. Pitkälä, H.W. Barkema, R. Bexiga, J. Roberson, L. Sølverød, R. Piccinini, D. Kelton, and P. Bredbacka. 2009. Analytical specificity and sensitivity of a real-time polymerase chain reaction assay for identification of bovine mastitis pathogens. J Dairy Sci 92:952-959.
97. O.C. Sampimon, H.W. Barkema, I.M.G.A. Berends, J. Sol, and T.J.G.M. Lam. 2009. Prevalence and herd-level risk factors for intramammary infection with coagulase-negative staphylococci in Dutch dairy herds. Vet Microbiol 134:37-44.
98. S. Piepers, S. de Vliegher, A. de Kruif, G. Opsomer, and H.W. Barkema. 2009. Impact of intramammary infections in dairy heifers on future udder health, milk production, and culling. Vet Microbiol 134:113-120.
99. A. Ceballos, J. Sanchez, H. Stryhn, J.B. Montgomery, H.W. Barkema, and J.J. Wichtel. 2009. Meta-analysis on the effect of oral Selenium supplementation on milk Selenium concentration in cattle. J Dairy Sci 92:324-342.
100. O.C. Sampimon, H.W. Barkema, I. Berends, J. Sol, and T.J.G.M. Lam. 2009. Prevalence of intramammary infection in Dutch dairy herds. J Dairy Res 76:129-136.
101. R.G.M. Olde Riekerink, H.W. Barkema, D.F. Kelton, and D.T. Scholl. 2008. Incidence rate of clinical mastitis on Canadian dairy farms. J Dairy Sci 91:1366-1377.
102. W. Steeneveld, H. Hogeveen, H.W. Barkema, J. van den Broek, and R.B.M. Huirne. 2008. The influence of cow factors on the incidence of clinical mastitis in dairy cows. J Dairy Sci 91:1391-1402.
28
103. F.D. Uehlinger, H.W. Barkema, R.M. O’Handley, M. Parenteau, L.J. Parrington, J.A. van Leeuwen, and B.R. Dixon. 2008. Comparison of flow cytometry and immunofluorescence microscopy for the detection of Giardia duodenalis in bovine fecal samples. J Vet Diagn Invest 20:178-185.
104. A.L. Salb, H.W. Barkema, B.T. Elkin, R.C.A. Thompson, D.P. Whiteside, S.R. Black, J.P. Dubey, and S.J. Kutz. 2008. Domestic dogs as sources and sentinels of parasites in Northern people and wildlife. Emerg Infect Dis 14:60-63.
105. W. Wapenaar, H.W. Barkema, M. Eysker, and R.M. O’Handley. 2007. An outbreak of dictyocaulosis on a dairy farm. J Am Vet Med Assoc 231:1715-1718.
106. S. Piepers, L. De Meulemeester, A. de Kruif, G. Opsomer, H.W. Barkema, and S. de Vliegher. 2007. Prevalence and distribution of mastitis pathogens in subclinically infected dairy cows in Flanders, Belgium. J Dairy Res 74:478-483.
107. C.J. Hewson, I.R. Dohoo, K.A. Lemke, and H.W. Barkema. 2007. Factors affecting Canadian veterinarians’ use of analgesics when dehorning beef and dairy calves. Can Vet J 48:1129-1138.
108. J.J. Lievaart, H.W. Barkema, W.D.J. Kremer, J. van de Broek, J.H.M. Verheijden, and J.A.P. Heesterbeek. 2007. Effect of herd characteristics, management practices, and season on different levels of the herd somatic cell count. J Dairy Sci 90:4137-4144.
109. J.J. Lievaart, W.D.J. Kremer, and H.W. Barkema. 2007. Comparison of bulk milk somatic cell count, yield-corrected, and average somatic cell counts as parameters to summarize the subclinical mastitis situation in a dairy herd. J Dairy Sci 90:4145-4148.
110. R.G.M. Olde Riekerink, H.W. Barkema, W. Veenstra, F.E. Berg, H. Stryhn, and R.N. Zadoks. 2007. Somatic cell counts during and between milkings. J Dairy Sci 90:3733-3741.
111. F.D. Uehlinger, R.M. O’Handley, S.J. Greenwood, N.J. Guselle, L.J. Gabor, C.M. van Velsen, R.F.L. Steuart, and H.W. Barkema. 2007. Efficacy of vaccination in preventing giardiasis in calves. Vet Parasitol 146:182-188.
112. W. Wapenaar, H.W. Barkema, R.M. O’Handley, and C.J.M. Bartels. 2007. Use of an enzyme-linked immunosorbent assay in bulk milk to estimate the prevalence of Neospora caninum problem dairy herds in Prince Edward Island, Canada. Can Vet J 48:512-514.
113. W. Wapenaar, H.W. Barkema, G. Schares, K. Rouvinen-Watt, L. Zeijlemaker, B. Poorter, R.M. O’Handley, O.C.H. Kwok, and J.P. Dubey. 2007. Evaluation of four serological techniques to determine the seroprevalence of Neospora caninum in foxes (Vulpes vulpes) and coyotes (Canis latrans) on Prince Edward Island, Canada. Vet Parasitol 145:51-58.
114. R.G.M. Olde Riekerink, H.W. Barkema, and H. Stryhn. 2007. The effect of season on somatic cell count and incidence of clinical mastitis. J Dairy Sci 90:1704-1715.
115. C.J. Hewson, I.R. Dohoo, K.A. Lemke, and H.W. Barkema. 2007. Canadian veterinarians’ use of analgesics in cattle, pigs and horses in 2004 and 2005. Can Vet J 48:155-164.
116. W. Wapenaar, H.W. Barkema, J.A. Vanleeuwen, J.T. McClure, R.M. O’Handley, O.C.H. Kwok, P. Thulliez, J.P. Dubey, and M.C. Jenkins. 2007. Comparison of serological methods for the diagnosis of Neospora caninum infection in cattle. Vet Parasitol 143:166-173.
117. F.D. Uehlinger, H.W. Barkema, B.R. Dixon, T. Coklin, and R.M. O’Handley. 2006. Giardia duodenalis and Cryptosporidium spp. in a veterinary college bovine teaching herd. Vet Parasitol 142:231-237.
29
118. W. Wapenaar, M.C. Jenkins, R.M. O’Handley, and H.W. Barkema. 2006. Neospora caninum-like oocysts observed in feces of free-ranging red foxes (Vulpes vulpes) and coyotes (Canis latrans). J Parasitol 92:1270-1274.
119. S.L.B. McKenna, G.P. Keefe, A. Tiwari, J. VanLeeuwen, and H.W. Barkema. 2006. Johne’s disease in Canada. Part II. Disease impacts, risk factors, and control programs for dairy producers. Can Vet J 47:1089-1099.
120. C.J. Sanford, G.P. Keefe, J. Sanchez, R.T. Dingwell, H.W. Barkema, K.E. Leslie, and I.R. Dohoo. 2006. Test characteristics from latent class models of the California Mastitis Test. Prev Vet Med 77:96-108.
121. A. Tiwari, J. VanLeeuwen, S.L.B. McKenna, G.P. Keefe, and H.W. Barkema. 2006. Johne’s disease in Canada. Part I. Clinical symptoms, pathophysiology, diagnosis, and prevalence in dairy herds. Can Vet J 47:874-882.
122. R.G.M. Olde Riekerink, H.W. Barkema, S. Veenstra, and G.P. Keefe. 2006. Prevalence of contagious mastitis pathogens in bulk tank milk in Prince Edward Island. Can Vet J 47:567-572.
123. S.L.B. McKenna, J.A. VanLeeuwen, H.W. Barkema, J.T. Jansen, G. Hauer, S.H. Hendrick, G. Coté, and R.E. Empringham. 2006. A proposed Canadian Voluntary Johne’s Disease Prevention and Control Program. Can Vet J 47:539-541.
124. H.W. Barkema, Y.H. Schukken, and R.N. Zadoks. 2006. Invited review: The role of cow, pathogen, and treatment regime in the therapeutic success of bovine Staphylococcus aureus mastitis. J Dairy Sci 89:1877-1895.
125. C.J. Sanford, G.P. Keefe, I.R. Dohoo, H.W. Barkema, R.T. Dingwell, and K.E. Leslie. 2006. Efficacy of an internal teat sealer used in conjunction with intramammary antibiotics on the cure of intramammary infections during the dry period. Bov Pract 40:26-32.
126. C.J. Sanford, G.P. Keefe, I.R. Dohoo, K.E. Leslie, R.T. Dingwell, L. DesCoteaux, and H.W. Barkema. 2006. Efficacy of using an internal teat sealer to prevent new intramammary infections in nonlactating dairy cattle. J Am Vet Med Assoc 228:1565-1573.
127. S.L.B. McKenna, H.W. Barkema, G.P. Keefe, and D.C. Sockett. 2006. Agreement between three ELISAs for Mycobacterium avium subsp. paratuberculosis in dairy cattle. Vet Microbiol 114:285-291.
128. S.L.B. McKenna, D.C. Sockett, G.P. Keefe, J McClure, J.A. VanLeeuwen, and H.W. Barkema. 2005. Comparison of two enzyme-linked immunosorbent assays for diagnosis of Mycobacterium avium subsp. paratuberculosis. J Vet Diagn Invest 17:463-466.
129. M. Gonzalez, H.W. Barkema, and G.P. Keefe. 2005. Monensin intoxication in a dairy herd. Can Vet J 46:910-912.
130. S.L. McKenna, G.P. Keefe, H.W. Barkema, and D.C. Sockett. 2005. Evaluation of three ELISAs for Mycobacterium avium subsp. paratuberculosis using tissue and fecal culture as comparison standards. Vet Microbiol 110:105-111.
131. R.G. Olde Riekerink, A. Dominici, H.W. Barkema, and A.J. de Smit. 2005. Seroprevalence of pestivirus in four species of Alpine wild ungulates in the High Valley of Susa, Italy. Vet Microbiol 108:297-303.
132. S. de Vliegher, H.W. Barkema, H. Stryhn, G. Opsomer, and A. de Kruif. 2005. Impact of early lactation somatic cell count in heifers on milk yield over the first lactation. J Dairy Sci 88:938-947.
30
133. Y. de Haas, H.W. Barkema, Y.H. Schukken, and R.F. Veerkamp. 2005. Associations between somatic cell count patterns and the incidence of clinical mastitis. Prev Vet Med 67:55-68.
134. S. de Vliegher, H.W. Barkema, G. Opsomer, A. de Kruif, and L. Duchateau. 2005. Association between somatic cell count in early lactation and culling of dairy heifers using Cox frailty models. J Dairy Sci 88:560-568.
135. C.H.J. Kalis, M.T. Collins, H.W. Barkema, and J.W. Hesselink. 2004. Certification of herds as free of Mycobacterium paratuberculosis infection: actual pooled faecal results versus certification model predictions. Prev Vet Med 65:189-204.
136. S.L.B. McKenna, G.P. Keefe, H.W. Barkema, J McClure, J.A. VanLeeuwen, P. Hanna, and D.C. Sockett. 2004. Cow-level prevalence of paratuberculosis in culled dairy cows in Atlantic Canada and Maine. J Dairy Sci 87:3770-3777.
137. S. De Vliegher, H.W. Barkema, H. Stryhn, G. Opsomer, and A. de Kruif. 2004. Impact of early lactation somatic cell count in dairy heifers on somatic cell counts over the first lactation. J Dairy Sci 87:3672-3682.
138. S. De Vliegher, G. Opsomer, A. Vanrolleghem, L. A. Devriese, O.C. Sampimon, J. Sol, H.W. Barkema, F. Haesebrouck, and A. de Kruif. 2004. In vitro growth inhibition of major mastitis pathogens by Staphylococcus chromogenes originating from teat apices of dairy heifers. Vet Microbiol 101:215-221.
139. M.J. Green, L.E. Green, Y.H. Schukken, A.J. Bradley, E.J. Peeler, H.W. Barkema, Y. de Haas, V.J. Hedges, and G.F. Medley. 2004. Somatic cell count distributions during lactation predict clinical mastitis. J Dairy Sci 87:1256-1264.
140. S. de Vliegher, H. Laevens, H.W. Barkema, I.R. Dohoo, H. Stryhn, G. Opsomer, and A. de Kruif. 2004. Management practices and heifer characteristics associated with early lactation somatic cell count of Belgian dairy heifers. J Dairy Sci 87:937-947.
141. M. Sevinga, T. Vrijenhoek, J.W. Hesselink, H.W. Barkema, and A. Groen. 2004. Effect of inbreeding on the incidence of retained placenta in Friesian horses. J Anim Sci 82:982-986.
142. M. Sevinga, H.W. Barkema, H. Stryhn, and J.W. Hesselink. 2004. Retained placenta in Friesian mares: incidence and potential risk factors with special emphasis on gestational length. Theriogenology 61:851-859.
143. Y. de Haas, R.F. Veerkamp, H.W. Barkema, Y.T. Gröhn, and Y.H. Schukken. 2004. Associations between pathogen-specific cases of clinical mastitis and somatic cell count patterns. J Dairy Sci 87:95-105.
144. C.H.J. Kalis, M.T. Collins, J.W. Hesselink, and H.W. Barkema. 2003. Specificity of two tests for the early diagnosis of bovine paratuberculosis based on cell-mediated immunity: the Johnin skin test and the gamma interferon assay. Vet Microbiol 97:73-86.
145. Y. de Haas, H.W. Barkema, Y.H. Schukken, and R.F. Veerkamp. 2003. Genetic associations for pathogen-specific clinical mastitis and patterns of peaks in somatic cell count. Anim Sci 77:187-195.
146. R.N. Zadoks, B.E. Gillespie, H.W. Barkema, O.C. Sampimon, S.P. Oliver, and Y.H. Schukken. 2003. Clinical, epidemiological and molecular characteristics of Streptococcus uberis infections in dairy herds. Epidemiol Infect 130:335-349.
147. S. de Vliegher, H. Laevens, H.W. Barkema, G. Opsomer, T. Hemling, and A. de Kruif. 2003. Short-term effect of transition from conventional milking to automated milking on teat skin and teat end condition. J Dairy Sci 86:1646-1652.
31
148. S.L. McKenna, H.W. Barkema, J T. McClure, and L. Rogers. 2003. Tetralogy of Fallot in a 2-year-old Holstein heifer. Can Vet J 44:312-313.
149. S. De Vliegher, H. Laevens, L.A. Devriese, G. Opsomer, J.L.M. Leroy, H.W. Barkema, and A. de Kruif. 2003. Prepartum teat apex colonization with Staphylococcus chromogenes in dairy heifers is associated with low somatic milk cell count in early lactation. Vet Microbiol 92:245-252.
150. Th. Dijkstra, H.W. Barkema, M. Eysker, M.L. Beiboer, and W. Wouda. 2003. Evaluation of a single serological screening of dairy herds for Neospora caninum antibodies. Vet Parasitol 110:161-169.
151. Th. Dijkstra, H.W. Barkema, C. Björkman, and W. Wouda. 2002. A high rate of seroconversion for Neospora caninum in a dairy herd without an obvious increased incidence of abortions. Vet Parasitol 109:203-211.
152. R.N. Zadoks, W.B. van Leeuwen, D. Kreft, L.K. Fox, H.W. Barkema, Y.H. Schukken, and A. van Belkum. 2002. Comparison of Staphylococcus aureus isolates from bovine and human skin, milking equipment, and bovine milk by phage typing, Pulsed-Field Gel Electrophoresis and Binary Typing. J Clin Microbiol 40:3894-3902.
153. R.N. Zadoks, H.G. Allore, T.J. Hagenaars, H.W. Barkema, and Y.H. Schukken. 2002. A mathematical model of Staphylococcus aureus control in dairy herds. Epidemiol Infect 129:397-416
154. G. van Schaik, Y.H. Schukken, M. Nielen, A.A. Dijkhuizen, H.W. Barkema, and G. Benedictus. 2002. Probability of and risk factors for introduction of infectious diseases into Dutch SPF dairy farms: a cohort study. Prev Vet Med 54:279-289.
155. J. Veling, H. Wilpshaar, K. Frankena, C. Bartels, and H.W. Barkema. 2002. Risk factors for clinical Salmonella enterica subsp. enterica serovar Typhimurium infection on Dutch dairy farms. Prev Vet Med 54:157-168.
156. C.H.J. Kalis, H.W. Barkema, J.W. Hesselink, C. van Maanen, and M.T. Collins. 2002. Evaluation of two absorbed enzyme-linked immunosorbent assays and a complement fixation test as replacements for fecal culture in the detection of cows shedding Mycobacterium avium subspecies paratuberculosis. J Vet Diagn Invest 14:219-224.
157. Y. de Haas, H.W. Barkema, and R.F. Veerkamp. 2002. The effect of pathogen-specific mastitis on the lactation curve for somatic cell count. J Dairy Sci 85:1314-1323.
158. Y. de Haas, H.W. Barkema, and R.F. Veerkamp. 2002. Genetic parameters of pathogen-specific incidence of clinical mastitis in dairy cows. Anim Sci 74:233-242.
159. Th. Dijkstra, H.W. Barkema, J.W. Hesselink, and W. Wouda. 2002. Natural transmission routes of Neospora caninum between farm dogs and cattle. Vet Parasitol 105:99-104.
160. Th. Dijkstra, H.W. Barkema, J.W. Hesselink, and W. Wouda. 2002. Point source exposure of cattle to Neospora caninum consistent with periods of common housing and feeding and related to the introduction of a dog. Vet Parasitol 105:89-98.
161. G.J. Wellenberg, C.J.M. Bruschke, H.J. Wisselink, H.W. Barkema, and J.T. van Oirschot. 2002. Simultaneous intramammary and intranasal inoculation of lactating cows with bovine herpesvirus 4 induce subclinical mastitis. Vet Microbiol 86:115-129.
162. M. Sevinga, H.W. Barkema, and J.W. Hesselink. 2002. Reproductive performance of Friesian mares after retained placenta and manual removal of the placenta. Theriogenol 57:923-930.
32
163. M. Sevinga, H.W. Barkema, and J.W. Hesselink. 2002. Serum calcium and Magnesium concentrations and the use of Calcium-Magnesium-borogluconate in the treatment of mares with retained placenta. Theriogenol 57:941-947.
164. J. Sol, O.C. Sampimon, E. Hartman, and H.W. Barkema. 2002. Effect of preculture freezing and incubation on bacteriological isolation from subclinical mastitis samples. Vet Microbiol 85:241-249.
165. J. Veling, H.W. Barkema, J. van der Schans, F. van Zijderveld, and J. Verhoeff. 2002. Herd-level diagnosis for Salmonella enterica subsp. enterica serovar Dublin in bovine dairy herds. Prev Vet Med 53:31-42.
166. F. Neijenhuis, H.W. Barkema, H. Hogeveen, J.P.T.M. Noordhuizen. 2001. Relationship between teat-end callosity and occurrence of clinical mastitis. J Dairy Sci 84:2664-2672.
167. M. Sevinga, H.W. Barkema, and J.W. Hesselink. 2001. Retained placenta in Friesian mares: reproductive performance after foal heat breeding versus breeding in a subsequent heat. Pferdeheilkunde 17:623-626.
168. M. Sevinga, H.W. Barkema, and J.W. Hesselink. 2001. Retained placenta in Friesian mares: incidence, risk factors, therapy, and consequences. Pferdeheilkunde 17:619-622.
169. R.N. Zadoks, H.G. Allore, H.W. Barkema, O.C. Sampimon, G.J. Wellenberg, Y.T. Gröhn, and Y.H. Schukken. 2001. Cow- and quarter-level risk factors for Streptococcus uberis and Staphylococcus aureus mastitis. J Dairy Sci 84:2649-2663
170. J. Veling, F.G. van Zijderveld, A.M. van Zijderveld-van Bemmel, Y.H. Schukken, and H.W. Barkema. 2001. Evaluation of two enzyme-linked immunosorbent assays for detecting Salmonella enterica subsp. enterica serovar Dublin antibodies in bulk milk. Clin Diagn Lab Immunol 8:1049-1055.
171. C.J.M. Bartels, H.W. Barkema, M.L. Beiboer, A. Bouma, and J.A. Stegeman. 2001. Management and herd performance of dairy herds with and without ‘chronic wasting’ disease. Tijdschr Diergeneeskd 126:198-207.
172. C.J.M. Bartels, H.W. Barkema, M.L. Beiboer, A. Bouma, and J.A. Stegeman. 2001. Comparison of performance of dairy herds that were or were not vaccinated with a bovine herpesvirus 1 marker vaccine in 1998. Tijdschr Diergeneeskd 126:191-197.
173. H.W. Barkema, C.J.M. Bartels, L. van Wuijckhuise, J.W. Hesselink, M. Holzhauer, M.F. Weber, P. Franken, P.A. Kock, C.J. Bruschke, and G.M. Zimmer. 2001. Outbreak of bovine virus diarrhoea on Dutch dairy farms induced by a bovine herpesvirus 1 marker vaccine contaminated with bovine virus diarrhoea virus type 2. Tijdschr Diergeneeskd 126:158-165.
174. Th. Dijkstra, M. Eysker, G. Schares, F.J. Conraths, W. Wouda, H.W. Barkema. 2001. Dogs shed Neospora caninum oocysts after ingestion of naturally infected bovine placenta but not after ingestion of colostrum spiked with Neospora caninum tachyzoites. Int J Parasitol 31:747-752.
175. R.N. Zadoks, H.G. Allore, H.W. Barkema, O.C. Sampimon, Y.T. Gröhn, and Y.H. Schukken. 2001. Analysis of an outbreak of Streptococcus uberis mastitis. J Dairy Sci 84:590-599.
176. C.H.J. Kalis, H.W. Barkema, J.W. Hesselink, and M.T. Collins. 2001. Use of long-term vaccination with a killed vaccine to prevent fecal shedding of Mycobacterium avium subsp. paratuberculosis in dairy herds. Am J Vet Res 62:270-274.
33
177. Th. Dijkstra, H.W. Barkema, C.J.M. Bartels, M. Eysker, and W. Wouda. 2001. Evidence of post-natal transmission of Neospora caninum in Dutch dairy herds. Int J Parasitol 31:209-215.
178. J. Muskens, H.W. Barkema, E. Russchen, K. van Maanen, Y.H. Schukken, and D. Bakker. 2000. Prevalence and regional distribution of paratuberculosis in dairy herds in The Netherlands. Vet Microbiol 77:253-261.
179. J. Veling, F. van Zijderveld, A.M. van Zijderveld-van Bemmel, H.W. Barkema, and Y.H. Schukken. 2000. Evaluation of three newly developed enzyme-linked immunosorbent assays and two agglutination tests for detecting Salmonella enterica subsp. enterica serovar dublin infections in dairy cattle. J Clin Microbiol 38:4402-4407.
180. C.H.J. Kalis, J.W. Hesselink, H.W. Barkema, and M.T. Collins. 2000. Culture of strategically pooled bovine fecal samples as a method to screen herds for paratuberculosis. J Vet Diagn Invest 12:547-551.
181. F. Neijenhuis, H.W. Barkema, H. Hogeveen, and J.P.T.M. Noordhuizen. 2000. Classification and longitudinal examination of callused teat ends in dairy cows. J Dairy Sci 83:2795-2804.
182. R. Zadoks, W. van Leeuwen, H. Barkema, O. Sampimon, H. Verbrugh, Y.H. Schukken, and A. van Belkum. 2000. Application of PGFE and binary typing as tools in clinical microbiology and molecular epidemiology of bovine and human Staphylococcus aureus. J Clin Microbiol 38:1931-1939.
183. J. Sol, O.C. Sampimon, H.W. Barkema, and Y.H. Schukken. 2000. Factors associated with cure after therapy of clinical mastitis caused by Staphylococcus aureus. J Dairy Sci 83:278-284.
184. H.W. Barkema. 1999. Udder health on dairy farms. 2. Mastitis control programs. Tijdschr Diergeneeskd 124:345-350.
185. H.W. Barkema. 1999. Udder health on dairy farms. 1. Results of a longitudinal study on 300 Dutch dairy farms. Tijdschr Diergeneeskd 124:338-344.
186. C.H.J. Kalis, J.W. Hesselink, E.W. Russchen, H.W. Barkema, M.T. Collins, and I.J.R. Visser. 1999. Factors influencing the isolation of Mycobacterium avium subsp. paratuberculosis from bovine fecal samples. J Vet Diagn Invest 11:345-351.
187. D. Döpfer, H.W. Barkema, T.J.G.M. Lam, Y.H. Schukken, and W. Gaastra. 1999. Recurrent clinical mastitis caused by Escherichia coli in dairy cows. J Dairy Sci 82:80-85.
188. H.W. Barkema, J.D. van der Ploeg, Y.H. Schukken, T.J.G.M. Lam, G. Benedictus, and A. Brand. 1999. Management style and its association with bulk milk somatic cell count and incidence rate of clinical mastitis. J Dairy Sci 82:1655-1663.
189. H.W. Barkema, Y.H. Schukken, T.J.G.M. Lam, M.L. Beiboer, G. Benedictus, and A. Brand. 1999. Management practices associated with the incidence rate of clinical mastitis. J Dairy Sci 82:1643-1654.
190. H.W. Barkema, H.A. Deluyker, Y.H. Schukken, and T.J.G.M. Lam. 1999. Quarter-milk somatic cell count at calving and at the first six milkings after calving. Prev Vet Med 38:1-9.
191. J. Sol, H.W. Barkema, I.M.J.M. Berghege, G.H.A. Borst, L.J.P. Hoornick, and O.C. Sampimon. 1998. Mastitis after drying off associated with teat wipes contaminated with Pseudomonas aeruginosa. Tijdschr Diergeneeskd 123:112-113.
34
192. A.R.W. Elbers, J.D. Miltenburg, D. de Lange, A.P.P. Crauwels, H.W. Barkema, and Y.H. Schukken. 1998. Risk factors for clinical mastitis in a random sample of dairy herds from the southern part of the Netherlands. J Dairy Sci 81:420-426.
193. H.W. Barkema, Y.H. Schukken, T.J.G.M. Lam, M.L. Beiboer, H. Wilmink, G. Benedictus, and A. Brand. 1998. Management practices associated with low, medium, and high somatic cell counts in bulk milk. J Dairy Sci 81:19 17-1927.
194. H.W. Barkema, Y.H. Schukken, T.J.G.M. Lam, ML. Beiboer, H. Wilmink, G. Benedictus, and A. Brand. 1998. Incidence of clinical mastitis in dairy herds grouped in three categories by bulk milk somatic cell counts. J Dairy Sci 81:411-419.
195. J.J. Hage, Y.H. Schukken, Th. Dijkstra, H.W. Barkema, P.H.R. van Valkengoed, and G.H. Wentink. 1998. Milk production and reproduction during a subclinical bovine herpesvirus 1 infection on a dairy farm. Prev Vet Med 34:97-106.
196. G. van Schaik, A.A. Dijkhuizen, G. Benedictus, H.W. Barkema, and J.L. Koole. 1998. Exploratory study on the economic value of a closed farming system on Dutch dairy farms. Vet Rec 142:240-242.
197. H.W. Barkema, Y.H. Schukken, T.J.G.M. Lam, D.T. Galligan, M.L. Beiboer, and A. Brand. 1997. Estimation of interdependence among quarters of the bovine udder with subclinical mastitis and implications for analysis. J Dairy Sci 80:1592-1599.
198. J.J. Hage, P. Vellema, Y.H. Schukken, H.W. Barkema, F.A.M. Rijsewijk, J.T. van Oirschot, and G.H. Wentink. 1997. Sheep do not have a major role in bovine herpesvirus 1 transmission. Vet Microbiol 57:41-54.
199. P. Vellema, L. Moll, H.W. Barkema, and Y.H. Schukken. 1997. Effect of cobalt supplementation on serum vitamin B12 levels, weight gain and survival rate in lambs grazing cobalt-deficient pastures. Vet Q 19:1-5.
200. J.J. Hage, Y.H. Schukken, H.W. Barkema, G. Benedictus, F.A.M. Rijsewijk, and G.H. Wentink. 1996. Population dynamics of bovine herpesvirus 1 infection in a dairy herd. Vet Microbiol 53:169-180.
201. H.W. Barkema, J. van der Schans, A.L.W. de Gee, G. Benedictus, T.J.G.M. Lam, and Y.H. Schukken. 1997. Effect of freezing on somatic cell count of quarter milk samples as determined by the Fossomatic electronic cell counter. J Dairy Sci 80:422-426.
202. T.J.G.M. Lam, J.H. van Vliet, Y.H. Schukken, F.J. Grommers, A. van Velden-Russcher, H.W. Barkema, and A. Brand. 1997. The effect of discontinuation of postmilking teat disinfection in low somatic cell count herds. II. Dynamics of intramammary infections. Vet Q 19:47-53.
203. T.J.G.M. Lam, J.H. van Vliet, Y.H. Schukken, F.J. Grommers, A. van Velden-Russcher, H.W. Barkema, and A. Brand. 1997. The effect of discontinuation of postmilking teat disinfection in low somatic cell count herds. I. Incidence of clinical mastitis. Vet Q 19:41-47.
204. S.H. Loeffler, T.J.G.M. Lam, H.W. Barkema, D. Scholten, A.L.D. Hessels, and A.M. van Gestel. 1995. The herd health approach of a high milk tank somatic cell count caused by Streptococcus agalactiae. Tijdschr Diergeneeskd 120:458-463.
205. Y.H. Schukken, T.J.G.M. Lam, M. Nielen, H. Hogeveen, H.W. Barkema, and F.J. Grommers. 1995. Subclinical and clinical mastitis in Dutch dairy herds: epidemiological developments. Tijdschr Diergeneeskd 120:208-213.
35
206. Th. Dijkstra, H.W. Barkema, R.D. van Buuren, J.G. van Spanje, and H. Jorritsma. 1994. Excretion time of intrauterine applied oxytetracycline and lugol in cows milk. Tijdschr Diergeneeskd 119:634-636.
207. H.W. Barkema, J.D. Westrik, Y.H. Schukken, K.A.S. van Keulen, and A. Brand. 1994. The effects of lameness on reproductive performance, production and culling. Prev Vet Med 20:249-259.
208. C.W. Rougoor, A.A. Dijkhuizen, H.W. Barkema, and Y.H. Schukken. 1994. The economics of Caesarean section in dairy cattle. Prev Vet Med 19:27-37.
209. H.W. Barkema, Y.H. Schukken, C.L. Guard, A. Brand, and G.C. van der Weyden. 1992. Fertility, production and culling following Cesarean section in dairy cattle. Theriogenol 38:589-599.
210. H.W. Barkema, Y.H. Schukken, C.L. Guard, A. Brand, and G.C. van der Weyden. 1992. Caesarean section in dairy cattle: a study of risk factors. Theriogenol 37:489-506.
Publications in Press:
1. Y. Khalil, A. Ueno, R. Mortier, H.W. Barkema, S. Ghosh, and J. De Buck. T-cell profiles in the peripheral blood of calves orally inoculated with Mycobacterium avium subspecies paratuberculosis. Accepted for publication (Vet Immunol Immunopathol).
2. R.A.R. Mortier, H.W. Barkema, K. Orsel, G.P. Muench, J. Bystrom, and J. De Buck. 2015. Longitudinal evaluation of diagnostics in young calves during subclinical and clinical paratuberculosis. In press (Can Vet J).
3. L. Solano, H.W. Barkema, E. Pajor, S. Mason, S.J. LeBlanc, J.C. Zaffino Heyerhoff, D.B. Haley, J. Rushen, A.M. de Passillé, and K. Orsel. 2015. Prevalence of lameness and associated risk factors in Canadian Holstein-Friesian cows housed in freestall barns. In press (J Dairy Sci).
4. H.W. Barkema, M.A.G. von Keyserlingk, J.P. Kastelic, T.J.G.M. Lam, C. Luby, J.-P. Roy, S.J. LeBlanc, G.P. Keefe, and D.F. Kelton. Changes in the dairy industry affecting dairy health and welfare. In press (J Dairy Sci).
5. C. Ritter, G.P. Kwong, R. Wolf, C. Pickel, M. Slomp, J. Flaig, S. Mason, C.L. Adams, D.F. Kelton, J. Jansen, J. De Buck, and H.W. Barkema. Factors influencing participation of Alberta dairy farmers in a voluntary management-based Johne’s disease control program. In press (J Dairy Sci).
6. R. Wolf, H.W. Barkema, J. De Buck, and K. Orsel. Factors impacting management changes on farms participating in a Johne’s disease control program. In press (J Dairy Sci).
7. L.J. Levison, E.K. Miller-Cushon, A.L. Tucker, R. Bergeron, K.E. Leslie, H.W. Barkema, and T.J. DeVries. Incidence rate of pathogen-specific clinical mastitis on organic and conventional Canadian dairy farms. Accepted for publication (J Dairy Sci).
8. R.A.R. Mortier, H.W. Barkema, and J. De Buck. Susceptibility to and diagnosis of Mycobacterium avium subspecies paratuberculosis infection in dairy calves: A review. In press (Prev Vet Med).
9. C.F. Murray, L. Fick, E.A. Pajor, H.W. Barkema, M. Jelinksi, and M.C. Windeyer. Calf management practices and associations with herd-level morbidity and mortality on cow-calf operations. Accepted for publication (Animal).
36
Publications Submitted:
1. J. Invik, S. Checkley, A. Massolo, N. Neumann, H.W. Barkema. Spatiotemporal analysis of Escherichia coli and total coliform water contamination in Alberta, Canada, an observational study. Submitted for publication (Environ Health).
2. M.E. Negrón, A. Rezaie, H.W. Barkema, K.P. Rioux, J. De Buck, S. Checkley, P.L. Beck, M. Carroll, R.N. Fedorak, L.A. Dieleman, R. Panaccione, S. Ghosh, and G.G. Kaplan. Ulcerative colitis patients with Clostridium difficile are at increased risk of death, colectomy, and post-operative complications: A population-based inception cohort study. Submitted for publication (Gastroenterology).
3. H. Derakhshani, J. De Buck, R. Mortier, H.W. Barkema, D.O. Krause, and E. Khafipour. Gut microbiota profiling of dairy calves experimentally infected with Mycobacterium avium subspecies paratuberculosis. Submitted for publication (Appl Environm Biol).
4. C. Ahlstrom, H.W. Barkema, K. Stevenson, R.N. Zadoks, R. Biek, R. Kao, H. Trewby, D. Haupstein, D.F. Kelton, G. Fecteau, O. Labrecque, G.P. Keefe, S.L.B. McKenna, K. Tahlan, and J. De Buck. Genome-wide diversity and phylogeography of Mycobacterium avium subsp. paratuberculosis in Canadian dairy cattle. Submitted for publication (BMC Genomics).
5. C. Ahlstrom, H.W. Barkema, and J. De Buck. The relative frequency of four major strain types of Mycobacterium avium subsp. paratuberculosis in Canadian dairy herds. Submitted for publication (Vet Microbiol).
6. A.L. Bras, H.W. Barkema, M. Woodbury, C. Ribble, and M.C. Windeyer. Prevalence, clinical presentation, and risk factors associated with Mycoplasma bovis in farmed bison (Bison bison) herds in Western Canada. Submitted for publication (J Am Vet Med Assoc).
7. R. Wolf, K. Orsel, J. De Buck, U. Kanevets, and H.W. Barkema. Evaluation of sampling socks for detection of Mycobacterium avium subspecies paratuberculosis on dairy farms. Submitted for publication (J Dairy Sci).
Publications in Preparation:
1. S.L.B. McKenna, H.W. Barkema, M.E. Negron, G.P. Keefe, and D.C. Sockett. Examination of fecal pooling strategies for detection of Mycobacterium avium subsp. paratuberculosis. In preparation for submission (J Dairy Sci).
2. R. Wolf, H.W. Barkema, J. De Buck, and K. Orsel. Dairy farms testing positive for Mycobacterium avium subspecies paratuberculosis have poorer hygiene and are less cautious when purchasing cattle than test-negative herds. In preparation for submission (Prev Vet Med).
3. L. Solano, H.W. Barkema, E.A. Pajor, S. Mason, S.J. LeBlanc, J.C. Zaffino Heyerhoff, R. Nash, D. B. Haley, D. Pellerin, J. Rushen, A.M. de Passillé, E. Vasseur and K. Orsel. 2015. Association between lying behavior and lameness in Canadian Holstein-Friesian cows housed in freestall barns. In preparation for submission (J Dairy Sci).
37
4. C. Ahlstrom, H.W. Barkema, J. Wasmuth, and J. De Buck. The microevolution of Mycobacterium avium subsp. paratuberculosis in Canadian dairy cattle. In preparation for submission (BMC Genomics).
5. G. Roy, J. De Buck, R. Wolf, R.A.R. Mortier, K. Orsel, and H.W. Barkema. Effect of experimental infection with Mycobacterium avium subspecies paratuberculosis on weight in Holstein-Friesian dairy calves. In preparation for submission (Can Vet J).
6. F.D. Uehlinger, S.J. Greenwood, J T. McClure, G.A. Conboy, R.M. O’Handley, and H.W. Barkema. Comparison of six diagnostic tests for Giardia duodenalis in fecal samples from young dogs. In preparation for submission (Am J Vet Res).
7. R. Wolf, H.W. Barkema, J. De Buck, R. Mortier, and K. Orsel. Use of cow characteristics and within-herd prevalence to explain differences between serum and milk ELISA results in low prevalence paratuberculosis herds. In preparation for submission (Can Vet J).
8. H.W. Barkema, M.A.G. von Keyserlingk, J.P. Kastelic, T.J.G.M. Lam, C. Luby, J.-P. Roy, G.P. Keefe, and D.F. Kelton. Changes in dairy veterinary practice resulting from changes in the dairy industry. In preparation for submission (J Dairy Sci). 9. G.B. Bond, D.M. Weary, M.A.G. von Keyserlingk, L. Doepel, K. Orsel, H.W. Barkema, and E. A. Pajor. Use of single measurements to assess growth and health of dairy calves and the effect of management practices on calf body weight variability and health status in Western Canada. In preparation for submission (J Dairy Sci).
10. M.E. Negrón, H.W. Barkema, and G.G. Kaplan. Changes in the annual incidence of colectomy for colorectal neoplasia among patients with ulcerative colitis: A population-based cohort. In preparation for submission (Clin Gastroenterol Hepatol).
11. H.W. Barkema, K. Orsel, many others, J. De Buck. Bottlenecks in the prevention and control of Mycobacterium avium subspecies paratuberculosis infection. In preparation for submission (Prev Vet Med).
12. J.H. Higginson Cutler, J. Rushen, A.M. de Passillé, J. Gibbons, K. Orsel, E. Pajor, H.W. Barkema, L. Solano, and E. Vasseur. What are the challenges that Canadian dairy producers face to reduce lameness in their herds? In preparation for submission (J Dairy Sci).
13. A.L. Bras, H.W. Barkema, M. Woodbury, C. Ribble, and M.C. Windeyer. Risk factors associated with Mycoplasma bovis in farmed bison (Bison bison) herds in Western Canada: a case-control study. In preparation for submission (Prev Vet Med).
14. P.H. Hogewerf, R.G.M. Olde Riekerink, A.H. Ipema, C.J.A.M. de Koning, H.J. Schuiling, B.A. Slaghuis, V. Tancin, I. Ohnstad, and H.W. Barkema. Impact of an automatic teat dipping and cluster flushing system on iodine residuals, milking characteristics and teat coverage. In preparation for submission (J Dairy Sci).
15. V. Saini, J T. McClure, P. Boerlin, J.-P. Roy, H.W. Barkema. Effect of antimicrobial treatment at dry-off and for clinical mastitis on development of AMR. In preparation for submission (J Clin Microbiol).
16. V. Saini, K. Reyher, D. Leger, J T. McClure, D.T. Scholl, H.W. Barkema. Comparison of two on-farm antimicrobial use record systems. In preparation for submission (J Dairy Sci).
17. V. Saini, R. Huggins, J. De Buck, H.W. Barkema. The impact of intramammary infection with coagulase-negative staphylococci on 305-day milk production and culling. In preparation for submission (J Dairy Sci).
38
18. L.A.Z. Condas, J. De Buck, D.B. Nobrega, D. Carson, and H.W. Barkema. Distribution of coagulase-negative staphylococci species isolated from milk in Canadian dairy herds. In preparation for submission (J Dairy Sci).
19. C.A. Bauman, H.W. Barkema, J. Dubuc, G.P. Keefe, and D.F. Kelton. Canadian National Dairy Study: Needs assessment of dairy producers, government, and dairy advisors. In preparation for submission (J Dairy Sci).
20. C. Ritter, G.P. Kwong, R. Wolf, C. Pickel, S. Mason, C.L. Adams, D.F. Kelton, J. Jansen, K. Orsel, J. De Buck, and H.W. Barkema. Is the herd-level prevalence of Mycobacterium avium subsp. paratuberculosis on Alberta dairy farms associated with participation in a voluntary Johne’s disease control program? In preparation for submission (J Dairy Sci).
Book chapters:
1. A. Bradley, H.W. Barkema, A. Biggs, M. Green, and T.J.G.M. Lam. 2013. Control of mastitis and enhancement of milk quality. Chapter 5 in Dairy Herd Health. Ed. M. Green. CAB International. ISBN 9781845939977, pp. 117-168.
2. H.W. Barkema, J.W. Hesselink, S.L.B. McKenna, G. Benedictus, and H. Groenendaal. 2010. Global prevalence and economics of infection with Mycobacterium avium subsp. paratuberculosis in ruminants. Chapter 2 in Paratuberculosis: organism, disease, control. Eds. M.A Behr and D.M. Collins. CAB International. ISBN 9781845936136, pp. 10-21.
3. H.W. Barkema, S. Hendrick, J. de Buck, G.G. Kaplan, and K. Rioux. 2010. Crohn’s disease in humans and Johne’s disease in cattle – linked diseases? Chapter 10 in Zoonotic pathogens in the food chain. Ed. D. Krause and S. Hendrick. CAB International. ISBN 9781845936815, pp. 197-213.
4. Y.H. Schukken, M.L. Beiboer and H.W. Barkema. 1995. Sampling of animal populations – a manual and computer program (in Dutch). Gezondheidsdienst voor Dieren, 75 pp.
Proceedings
>300 abstracts in proceedings of scientific meetings.
Publications in Non-refereed Journals:
1. R. Wolf, K. Orsel, J. De Buck, and H.W. Barkema. 2015. Calves shedding Mycobacterium avium subspecies paratuberculosis are common on infected dairy farms. Western Canadian Association of Bovine Practitioners Newsletter 22(2):18.
2. R. Wolf, K. Orsel, J. De Buck, and H.W. Barkema. 2014. High percentage of Alberta and Saskatchewan dairy farms are infected with Mycobacterium avium subsp. paratuberculosis, the cause of Johne’s disease. Dairy Research and Extension Consortium of Alberta dairy research summary, July 2014.
39
3. H.W. Barkema, J. De Buck, P. Ajitkumar, L. Condas, and H. Poirier. 2013. Des progrès pour percer le mystère des staphyloques à coagulase négative! Le producteur de lait québécois June 2013:42-44.
4. H.W. Barkema, and D.F. Kelton. 2013. Are Canadian dairy farms coping with the decrease in the bulk milk somatic cell count limit? Canadian Jersey Breeder Magazine Dec 2012-Jan 2013:29-30.
5. H.W. Barkema, and R.G.M. Olde Riekerink. 2012. Udder health in Canadian dairy herds. Canadian Jersey Breeder Magazine June-July 2012:38-39.
6. V. Saini, S. Nilsson, H.W. Barkema, P. Boerlin, J McClure, and H. Poirier. 2012. Concerns allayed? New study data show that Canadian dairy farmers using antibiotics responsible to treat or prevent mastitis in their cattle. Milk Producer May 2012:34-35.
7. H.W. Barkema. 2012. The future of milk testing by milk recording organizations: “What else can milk tell us”? 2011 Progress report CanWest DHI Ontario, p. 72 and 2011 CanWest DHI Western Herd Improvement Report, p. 32.
8. C. Heinrich, S. Ghosh, K. Sharkey, and H.W. Barkema. 2011. Toward patient-focused research: integrated KT in action. Alberta Innovates – Health Solutions KT Casebook 2:21-25.
9. T.J. De Vries, K.E. Leslie, H.W. Barkema, J. Rodenburg, G. Seguin, and A.-M. Christen. 2010/2011. Système de traite robotisée. Le comportement des vaches influence-t-il la santé du pis? Le producteur de lait québécois. December 2010/January 2011:36-38.
10. Barkema, H.W., and S.L.B. McKenna. 2010. Monitoring infectious disease using milk. CanWest DHI 2009 Western Herd Improvement Report, April 2010:6, and CanWest DHI 2009 Ontario Herd Improvement Report, April 2010:10.
11. Barkema, H., and R. Olde Riekerink. 2009. Using somatic cell count data to detect infection – It’s not how it’s collected, but when. The Udder Quarter, April 2009:4.
12. Barkema, H.W. 2009. Do I have a high somatic cell count problem? 2009. CBMRN Mastitis-Flash, Vol 3, Issue 2 http://www.medvet.umontreal.ca/reseau_mammite/producteurs/index.php?lang=en&page=high_somatic
13. Barkema, H.W. 2009. How can I solve a high somatic cell count problem? 2009. CBMRN Mastitis-Flash, Vol 3, Issue 2 http://www.medvet.umontreal.ca/reseau_mammite/producteurs/index.php?lang=en&page=high_somatic2
14. Barkema, H.W., S. de Vliegher, J. Baillargeon, and R.N. Zadoks. 2009. Comment résoudre un problem de CCS élevé? Le producteur de lait québécois. February 2009:42-44.
15. Barkema, H.W., and R.G.M. Olde Riekerink. 2009. Timing is everything. Milk Producer January 2009:33-35.
16. Barkema, H.W., S. de Vliegher, J. Baillargeon, and R.N. Zadoks. 2008/2009. Quelle est la cause d’un CCS élevé? Le producteur de lait québécois. December 2008/January 2009:31-33.
17. Barkema, H.W., and R.G.M. Olde Riekerink. 2008. Seasonal swings. Milk Producer October 2008:42-46.
18. Barkema, H.W., and R.G.M. Olde Riekerink. 2008. Le CCS. Le moment ideal pour l’échantillonnage. Le producteur de lait québécois. September 2008:14-15.
40
19. Olde Riekerink, R.G.M., P. Hogewerf, K. de Koning, I. Ohnstadt, and H.W. Barkema. 2008. Automatic post-dipping. Veeteelt 25 (15): 12-14.
20. Barkema, H.W, and R.G.M. Olde Riekerink. 2008. Les saisons influent-elles sur le CCS? Le producteur de lait québécois 28 (8): 30-31.
21. Barkema, H.W., J. De Buck, and O. Illanes. 2007. Public perception of risk. Milk Producer December 2007:34-37.
22. Scholl, D.T., H.W. Barkema, and J. Baillargeon. 2007. Rational antibiotic use. Milk Producer November 2007:34-36.
23. Scholl, D.T., H.W. Barkema, and J. Baillargeon. 2007. Mammite et antibiorésistance. Le producteur de lait québécois. July/August 2007:30-31
24. Barkema, H. W. 2007. On-farm data collection of Canadian Bovine Mastitis Research Network started. Western Canadian Association of Bovine Practitioners newsletter 13 (1): 6.
25. Zadoks, R. N. and H. W. Barkema. 2006. The role of therapy in mastitis control. Magazyn Weterynaryjny [In Polish].
26. R.G.M. Olde Riekerink, and H.W. Barkema. 2006. La mammite au Canada. Le producteur de lait québécois 26 (7): 34-36.
27. R.G.M. Olde Riekerink, and H.W. Barkema. 2006. Mastitis: the Canadian perspective. Advances in Dairy Technology 18.
28. R.G.M. Olde Riekerink, and H.W. Barkema. 2006. Applied science: taking stock of mastitis. The Milk Producer 2006 (Feb): 20-22.
29. H.W. Barkema. 2004. Assessment of the mastitis situation in Canada. Dairy Farmers of Nova Scotia Newsletter 4 (11): 4.
30. Y. de Haas, H.W. Barkema, Y.H. Schukken, and R.F. Veerkamp. 2003. Peaks in somatic cell counts – Mastitis pathogen can be recognized from specific peak patterns. Veeteelt 20 (3): 12-14.
31. Y. de Haas, H.W. Barkema, A. Groen, Y.H. Schukken, and R.F. Veerkamp. 2002. Breeding on low somatic cell count is effective against E. coli, but not against S. aureus. Veeteelt 19 (11/12): 10-12.
32. O. Sampimon, J. Sol, and H.W. Barkema. 2000. Treatment of mastitis with varying success (in Spanish). Bioleche – Inia Quilamapu 13 (1): 45-47.
33. O. Sampimon, J. Sol, and H.W. Barkema. 1999. Varying degrees of success with mastitis treatment. Veepro-Holland 36: 14-15.
34. H.W. Barkema, OC. Sampimon, and T.J.G.M. Lam. 1999. The herd treatment plan (in Dutch). Veeteelt 16 (19): 1036-1037.
35. H.W. Barkema, O.C. Sampimon, J. Sol, and T.J.G.M. Lam. 1999. Treatment at drying off (in Dutch). Veeteelt 16 (17): 882-883.
36. H.W. Barkema, OC. Sampimon, J. Sol, and T.J.G.M. Lam. 1999. Treatment of van mastitis (in Dutch). Veeteelt 16 (15/16): 770-771.
37. H.W. Barkema. Udder health on dairy farms. A longitudinal study (summary of a recent PhD thesis). IDF Mastitis Newsletter 23:12.
38. H.W. Barkema, O.C. Sampimon, and J. Sol. 1999. Bacteriological-negative samples (in Dutch). Veeteelt 16 (13/14): 690-691.
39. H.W. Barkema, D. de Lange, and A. Kuiper. 1999. Nutrition and udder health (in Dutch). Veeteelt 16 (11/12): 624-625.
41
40. J.D.H.M. Miltenburg, and H.W. Barkema. 1999. Milking technique and udder health (in Dutch) Veeteelt 16 (9): 498-499.
41. H.W. Barkema, and J.D.H.M. Miltenburg. 1999. Milking machine and udder health (in Dutch) Veeteelt 16 (7): 368-369.
42. H.W. Barkema, 0. Sampimon, J. Sol, and A. Kuiper. 1999. Aureus makes victims (in Dutch). Veeteelt 16 (5): 260-261.
43. H.W. Barkema, T.J.G.M. Lam, and D. Döpfer. 1999. The increasing incidence of E. coli mastitis (in Dutch). Veeteelt 16(3): 116-117.
44. H.W. Barkema. T.J.G.M. Lam, Y.H. Schukken, and C.H.J. Kalis. 1999. Mastitis during the lactation (in Dutch). Veeteelt 16 (1/2) January 1/2: 54-5 5.
45. H.W. Barkema, H. Boers, S. Booyink, and A. Meindertsma. 1998. Somatic cell count after calving (in Dutch). Veeteelt 15 (23) December 1:1490-1491.
46. H.W. Barkema, T.J.G.M. Lam, and Y.H. Schukken. 1998. Bulk milk somatic cell count and mastitis (in Dutch). Veeteelt 15 (21) November 1:1370-1371.
47. H.W. Barkema, T.J.G.M. Lam, and Y.H. Schukken. 1998. Udder health and somatic cell count (in Dutch). Veeteelt 15 (19) October 1:1186-1187.
48. H.W Barkema. 1998. Mastitis in heifers (in Dutch). Veehouder en Dierenarts 12 (4): 8-10.
49. H.W. Barkema. 1996. Farmers are not enough on the alert in the pasture season (in Dutch) Melkspiegel (FDF) 1996: 12-13.
50. H.W. Barkema. 1996. Mastitis and bulk milk somatic cell count (in Dutch). Nestlé Nieuws 8 (3): 3, and Salland Nieuwsbrief 9703: 2-3.
51. H.W. Barkema. 1996. Wise use of drugs (in Dutch). Nestlé Nieuws 8 (2): 3, and Salland Nieuwsbrief 9702: 2-3.
52. H.W. Barkema. 1996. Milk quality (in Dutch). Nestlé Nieuws 8 (1): 3, and Salland Nieuwsbrief 9606: 2-3.
53. H.W. Barkema, M.M. de Jong, and L. Sennema. Heifer mastitis (in Dutch). 1996. Veeteelt 13 (March 1): 240-241.
54. H.W. Barkema, K.A.S. van Keulen, Y.H. Schukken, and J.D. Westrik. 1993. The effect of lameness on production, fertility, and culling of dairy cattle (in Dutch). Veeteelt 10 (19): 964-965.
55. C. Rougoor, A.A. Dijkhuizen, H.W. Barkema, and Y.H. Schukken. 1992. A cost-benefit analysis of Cesarean sections of dairy cattle (in Dutch). Veeteelt 9 (3): 86-87.
56. H.W. Barkema, L. Elving, G. van Exel, P. Fontijne, B. Rutgers, G. Smolders, G.C. van der Weijden, and B. Wertenbroek. 1992. A sound breeding policy can contribute to a decrease of problems at calving (in Dutch). Veeteelt 9 (3): 82-84.
15. Invited Presentations (since start position UPEI at August, 2001)
November 20, 2014 Changes in the dairy industry affecting dairy veterinary practice. Colloque sur la santé des troupeaux laitiers, 10th edition. Drummondville, QC, Canada.
August 11-14, 2014 Mastitis prevention. Seven lectures in England, UK, for DairyCo.
42
June 24, 2014 Keynote presentation: Bottlenecks in the prevention and control of Mycobacterium avium subsp. paratuberculosis infection. 12th International Colloquium on Paratuberculosis. Parma, Italy.
April 23, 2014 Biosecurity on Alberta dairy farms. Animal Disease Risk Assessment and Surveillance Symposium. Calgary, AB, Canada.
April 10, 2014 The future of dairy veterinary practice. Ontario Association of Bovine Practitioners and Ontario Agri-Business Association Spring Meeting. Guelph, ON, Canada.
March 11, 2014 Mastitis prevention workshop. Western Canadian Dairy Seminar. Red Deer, AB, Canada.
February 4-5, 2014 Consumer Concerns about food production: do we need to be worried about how milk is produced? Nutrition File Seminar, Food integrity: building consumer trust in our food system. Edmonton and Calgary, AB, Canada.
January 20, 2014 The Alberta Inflammatory Bowel Disease Consortium – a logical collaboration between human and veterinary medical researchers. Working together for better health; Symposium celebrating research collaborations between the faculties of Veterinary Medicine and Medicine. University of Calgary, AB, Canada.
November 29, 2013 Update on Johne’s disease research in Calgary. Continuing Education for Belgian Veterinary Practitioners. Ghent University, Belgium.
November 26, 2013 Prevention and treatment of mastitis: the role of the veterinary practitioner, and an update on Canadian research. Udder forum, Kortrijk, Belgium
July 25, 2013 Transmission pattern profiling of Mycobacterium avium subsp. paratuberculosis between and within Canadian dairy herds by fast and discriminating strain typing. Dairy Research for a Healthy World Symposium, Toronto, ON, Canada
March 14, 2013 Results of research in the Canadian Bovine Mastitis and Milk Quality Research Network. Webinar for directors of the provincial and national Canadian dairy organizations.
January 30, 2013 Managing infectious disease in dairy herds. Central Manitoba Holstein Dairy Club annual conference, Carman, MB, Canada.
November 30, 2012 The mastitis situation in Canada. TOPVAC vaccine launch, Edmonton, AB, Canada.
October 3, 2012 The UofC Faculty of Veterinary Medicine: Born out of the BSE crisis. Gyro Club Calgary Central, Calgary, AB, Canada.
September 26, 2012 Managing infectious disease in dairy herds. 17th Annual General Meeting of Canadian Dairy Network and the 2012 Dairy Cattle Improvement Industry Forum, West Kelowna, BC, Canada
September 25, 2012 Innovation, discovery and improving health outcomes – The Alberta Inflammatory Bowel Disease Consortium. Research Network Fest, Calgary, AB, Canada
43
June 17, 2012 Availability and sustainability of health databases and tissue banks in Alberta. Alberta Innovates – Health Solutions Making Connections Conference, Jasper, AB, Canada
June 11, 2012 Research in UCVMs Department of Production Animal Health. Alberta
Beef Producers, Animal Health and Welfare Working Group, Edmonton,
AB, Canada
April 26, 2012 Johne’s disease in cattle and Crohn’s disease in humans – linked diseases?? Seminar Series Gastroenterology Group, University of Manitoba, Winnipeg, MN, Canada.
March 8, 2012 An update on the Alberta Johne’s Disease Initiative. 30th Western
Canadian Dairy Seminar, Red Deer, AB, Canada
March 6, 2012 Essentials of a disease control program with a focus on Johne’s disease.
British Columbia Ministry of Agriculture, Abbotsford, BC, Canada
February 14, 15, 16, Mastitis in Alberta. Canadian Bovine Mastitis Research Network
2012 workshops, Lethbridge, Red Deer and Leduc, AB, Canada
February 4, 2012 Johne’s Disease Control in Canada – Coordinated Nationally – Delivered
Provincially. 3rd ParaTB Forum, Sydney, Australia
January 31, 2012 Making a difference: from innovation platforms to personalized medicine.
Alberta Health and Wellness Lunch ‘n Learn Presentations, Edmonton,
AB, Canada
January 21, 2012 Improving udder health on dairy farms using the TACTIC udder
health veterinary kit. Annual meeting of Western Canadian Association of
Bovine Practitioners, Calgary, AB, Canada
January 12, 2012 How to get a low bulk tank somatic cell count and keep it low. Eastern
Manitoba Holstein Dairy Club annual conference, Steinbach, MN,
Canada
January 12, 2012 Latest research results related to Johne’s disease research. Eastern
Manitoba Holstein Dairy Club annual conference, Steinbach, MN,
Canada
January 11, 2012 Production of safe high quality milk. Dairy Farmers of Ontario annual
general meeting, Toronto, ON, Canada
January 10, 2012 Use of milk for monitoring disease in dairy herds. CanWest DHI annual
general meeting, Toronto, ON, Canada
October 18, 2011 The role of biosecurity in endemic disease on dairy farms. CanWest
Veterinary Conference, Banff, AB, Canada
October 18, 2011 Johne’s disease in cattle and Crohn’s disease in humans – linked diseases?? CanWest Veterinary Conference, Banff, AB.
October 3, 2011 Johne’s disease in cattle and Crohn’s disease in humans – linked diseases?? 40th Annual Meeting of the Canadian Institute of Public Health Inspectors, Calgary, Alberta, Canada
June 8, 2011 Udder health treatment and prevention: what is in the near future? 10 year Orbeseal Symposium. Pfizer. London, UK.
June 9, 2011 Mastitis and Animal Welfare. 10 year Orbeseal Symposium. Pfizer. London, UK.
44
June 9, 2011 Animal welfare in udder health – Prevention and treatment: the role of the veterinarian. 10 year Orbeseal Symposium. Pfizer. London, UK.
May 31, 2011 How to get a low bulk tank somatic cell count and keep it low. Nutri-Source annual meeting for clients, Sylvan Lake, AB, Canada
May 30, 2011 An Alberta Disease Control Program with a focus on Johne’s Disease – the AJDI. Personnel of CanWest DHI, Calgary, AB, Canada
March 29, and The Alberta Johne’s Disease Initiative. Alberta Milk Spring Meetings.
April 7 and 8, 2011 Red Deer, Taber and Lethbridge, AB, Canada
February 17, 2011 How to get a low bulk tank somatic cell count and keep it low. Annual Meeting Dairy Farmers of Manitoba, Brandon, MN, Canada
November 30, 2010 The Dutch Udder Health Centre, an international perspective. Final symposium of the Dutch Udder Health Centre, Arnhem, The Netherlands.
November 29, 2010 The Canadian Bovine Mastitis Research Network. 3rd Annual meeting Dutch Mastitis Research Workers, Utrecht, The Netherlands
November 28- Approach of mastitis on large dairy farms. Four lectures to Dutch farmers
December 1, 2010 for the Dutch Udder Health Centre.
November 26, 2010 The added value of collaboration between basic scientists and clinicians/epidemiologists. Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
November 18, 2010 Johne’s disease in cattle and Crohn’s disease in humans – linked diseases?? John Waters Zoonotic Disease Workshop, Calgary, Alberta, Canada
June 8, 2010 Johne’s disease in cattle and Crohn’s disease in humans – linked diseases?? 10th Canadian Animal Health Laboratorian Network Annual Meeting, Calgary, Alberta, Canada
December 17, 2009 Johne’s disease in cattle and Crohn’s disease in humans – linked diseases?? Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
November 15, 2009 Alberta Inflammatory Bowel Disease Consortium – A new approach to the study of IBD. Crohn’s and Colitis Foundation of Canada Annual Meeting: CCFC & You, Emerging Trends in Inflammatory Bowel Disease, Calgary, Canada
June 23, 2009 Use of bulk milk for herd-level disease monitoring. CanWest DHI meeting, Guelph, Ontario, Canada
April 24, 2009 Mastitis Prevention and Therapy – What makes sense from an overall herd perspective. Veterinary clinics around Lethbridge, AB, Canada
March 10, 2009 Use of bulk milk for herd-level disease monitoring. CanWest DHI seminar at Western Canadian Dairy Seminar, Red Deer, Alberta, Canada
December 5, 2008 Heifer mastitis: Attention today, pays off tomorrow! Manitoba Dairy Seminar 2008, Winnipeg, MN, Canada
March 4-8, 2008 New approaches to mastitis prevention. Western Canadian Dairy Seminar, Red Deer, Alberta, Canada
January 27, 2008 Biosecurity and mastitis. National Mastitis Council (NMC) 47th annual meeting, New Orleans, LA, USA
December 11, 2007 The mastitis situation in Canada – where do you stand? Colloque sur la
45
santé des troupeaux laitiers, 3e edition, Quebec City, Canada
July 19, 2007 Brief update on status of potential link with Crohn’s Disease. Johne’s Disease Meeting of Dairy Farmers of Canada and the Canadian Cattlemen’s Association, Calgary, AB, Canada
July 19, 2007 Overview of current Canadian research and applications submitted which address the gaps identified. Johne’s Disease Meeting of Dairy Farmers of Canada and the Canadian Cattlemen’s Association, Calgary, AB, Canada
June 25, 2007 Impact of heifer mastitis on somatic cell count, production, culling and fertility. Conference on heifer mastitis, Ghent, Belgium
March 21, 2007 Johne’s disease – the Canadian situation. University of Calgary, Gastrointestinal Research Group seminars, Calgary, Canada
January 17, 2007 Johne’s disease – towards a national prevention and control program. Technical Committee of the Alberta Beef Producers, Calgary, Canada
December 18, 2006 Veterinary Education in Calgary. Norwegian Veterinary School, Oslo,
Norway
October 20-23, 2006 Management of a high somatic cell count problem. 27th IDF World Dairy
Congress, Shanghai, China
March 27-30, 2006 Treatment of mastitis. III Panamerican Congress on Mastitis Control and
Milk Quality, Leon, Guanajuato, Mexico (presented by my former graduate student Ruth Zadoks because of adoption of our 3rd daughter from China)
March 7, 2006 Mastitis, the Canadian perspective. Western Canadian Dairy Seminar, Red Deer, Alberta, Canada (presented by my graduate student Richard Olde Riekerink because of adoption of our 3rd daughter from China)
December 7, 2005 Heifer mastitis: Attention today, pays off tomorrow! Collogue sur la santé des troupeaux laitiers, Saint-Hyacinthe, QC, Canada
July 24, 2005 Epidemiology of mastitis: change in distribution of mastitis pathogens,
bulk milk somatic cell count and preventative practices in the last decade. CSAS Mastitis Symposium at the 2005 American Dairy Science Association/American Animal Science Association/Canadian Society of Animal Science Joint Annual Meeting, Cincinnati, OH, USA
June 21-22, 2005 Control of mastitis in dairy cows. Italian Association of Bovine
Practitioners, Milan, Italy (two-day continuing education course)
April 2, 2005 Health problems in organic dairy farms. Organic dairy symposium Prince
Edward Island. Charlottetown, PEI, Canada
February 23, 2005 Voluntary Atlantic Johne’s disease program. 2005 New Brunswick Dairy Conference, Moncton, NB, Canada
January 22, 2005 Prepartum heifers – is preventative treatment warranted? 5th Annual CE Conference of the Atlantic Bovine Practitioners Association, Moncton, NB, Canada
January 22, 2005 Atlantic Johne’s program. 5th Annual CE Conference of the Atlantic Bovine Practitioners Association, Moncton, NB, Canada
November 25, 2004 Treatment of subclinical mastitis. Belgian Mastitis Forum, Ghent, Belgium
46
October 22, 2004 Marrying epidemiology and basic science: a tale of two studies. Biomedical Science seminars, Atlantic Veterinary College, Charlottetown, PEI
March 31, 2004 Johne’s Disease – Management and the Crohn’s debate. Dairy Focus, Dartmouth, NS, Canada
February 1, 2004 Cure of subclinical Staphylococcus aureus mastitis during lactation. 43rd Natl Mastitis Counc Ann Mtg, Charlotte, NC, USA
January 22, 2004 Johne’s – An international perspective. 4th Annual CE Conference of the Atlantic Bovine Practitioners Association, Moncton, NB, Canada
October 7, 2003 The effect of an internal teat sealer on udder health after calving. Royal Veterinary and Agricultural College, Copenhagen, Denmark
October 7, 2003 A slaughterhouse study on the cow-level prevalence of paratuberculosis in dairy cows in Atlantic Canada and the state of Maine (USA). Royal Veterinary and Agricultural College, Copenhagen, Denmark
May 1, 2003 Giardia and Cryptosporidium infections in domestic livestock: zoonotic potential, transmission dynamics, and threat to drinking water. Giardia and Cryptosporidium seminar. Atlantic Veterinary College, Charlottetown, Canada
March 18, 2003 The Foot-and-Mouth Disease outbreak in The Netherlands and Great Britain. Veterinary College, Agricultural University, Beijing, China
March 18, 2003 The role of the dog in the transmission of Neospora caninum. Veterinary College, Agricultural University, Beijing, China
March 18, 2003 Possibilities and challenges to become a graduate student in North America. Veterinary College, Agricultural University, Beijing, China
February 6, 2003 Udder health in the high production herd. 2003 New Brunswick Dairy Conference, Moncton, NB, Canada
January 26, 2003 The effect of management style on udder health. 42nd Natl Mastitis Counc Ann Mtg, Fort Worth, TX, USA
January 18, 2003 The Foot-and-Mouth Disease outbreak in The Netherlands and Great Britain. Annual conference of the SCVMA, Charlottetown, PE, Canada
November 14, 2002 Bulk milk SCC and distribution of mastitis pathogens in The Netherlands over the last decades. Mastitis Research Workers annual conference, Chicago, IL, USA
July 18, 2002. Johne’s – An international perspective with special emphasis on The Netherlands. 54th Ann Conf of the Can. Vet. Med. Assoc., Halifax, NS, Canada
47
16. Teaching Responsibilities
Currently, at the Faculty of Veterinary Medicine of the University of Calgary we are developing the graduate curriculum (the DVM curriculum is now relatively established), continue building the facilities and recruiting the faculty members that are needed for teaching and research.
The courses and contact hours from 2006 to present have changed significantly from year to year because of recruitment of new colleagues. My teaching load is significantly less than at UPEI because of my activities as Leader of the Alberta IBD Consortium and NSERC Industrial Research Chair in Infectious Diseases of Dairy Cattle. My annual course work in the academic year 2013-2014 is as follows.
Course Work and Student Contact
Course
Contact Hours
VETM 344, Principles of Veterinary Epidemiology (1st year)
6
VETM 420, Health Management (2nd year)
6
VETM 461, Outbreak Investigation (2nd year)
8
VETM 462, Foreign Animal Disease Field Course (2nd year)
1
VETM 520, Advanced Health Management (3rd year)
15
MDCH640, Fundamentals of Epidemiology (post-graduate)
65
Totals
101
In Calgary, I have supervised 12 DVM summer students, 14 Dutch veterinary students doing a 3-month scientific rotation and 4 HYRS students.