World's Best Scientists 2026 revealed!
Herman W. Barkema

Herman W. Barkema

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Animal Science and Veterinary
Canada
2026

D-Index & Metrics

Animal Science and Veterinary

D-Index
100
Citations
39667
World Ranking
18
National Ranking
4

Research.com Recognitions

  • 2026 - Research.com Animal Science and Veterinary in Canada Leader Award
  • 2025 - Research.com Animal Science and Veterinary in Canada Leader Award
  • 2023 - Research.com Animal Science and Veterinary in Canada Leader Award
  • 2022 - Research.com Animal Science and Veterinary in Canada Leader Award

Overview

Herman W. Barkema is affiliated with the University of Calgary in Canada. Their research primarily spans the fields of Medicine, Agricultural and Biological Sciences, and Biochemistry, Genetics and Molecular Biology. Within these broader areas, the scientist has contributed extensively to subfields including Agronomy and Crop Science, Epidemiology, Infectious Diseases, Small Animals, and Molecular Biology.

Their work covers multiple topics of study such as Milk Quality and Mastitis in Dairy Cows, Animal Behavior and Welfare Studies, Probiotics and Fermented Foods, Mycobacterium research and diagnosis, Animal Disease Management and Epidemiology, Microbial infections and disease research, and Genetic and phenotypic traits in livestock.

Major publication venues where Barkema's work frequently appears include:

  • Journal of Dairy Science
  • Frontiers in Veterinary Science
  • bioRxiv (Cold Spring Harbor Laboratory)
  • Frontiers in Genetics
  • Frontiers in Microbiology

Recent papers authored or co-authored by Barkema encompass a range of topics related to antimicrobial resistance, animal health, and dairy science. Notable works include:

  • Antimicrobial resistance (AMR) in COVID-19 patients: a systematic review and meta-analysis (November 2019-June 2021), 2022, Antimicrobial Resistance and Infection Control
  • Non-aureus Staphylococci and Bovine Udder Health: Current Understanding and Knowledge Gaps, 2021, Frontiers in Veterinary Science
  • Economic losses due to Johne's disease (paratuberculosis) in dairy cattle, 2021, Journal of Dairy Science
  • Invited review: Academic and applied approach to evaluating longevity in dairy cows, 2020, Journal of Dairy Science
  • Composition and co-occurrence patterns of the microbiota of different niches of the bovine mammary gland: potential associations with mastitis susceptibility, udder inflammation, and teat-end hyperkeratosis, 2020, Animal Microbiome

Frequent collaborators include John P. Kastelic, D.F. Kelton, Bo Han, Diego B. Nóbrega, and Simon Dufour, reflecting a network of ongoing research partnerships.

In addition to articles, Barkema has contributed to book publications, including a title published by Frontiers Media titled Zoonoses - A One Health Approach in 2023.

Best Publications

  • Increasing Incidence and Prevalence of the Inflammatory Bowel Diseases With Time, Based on Systematic Review

    Natalie A. Molodecky;Ing Shian Soon;Doreen M. Rabi;William A. Ghali

  • Restricting the use of antibiotics in food-producing animals and its associations with antibiotic resistance in food-producing animals and human beings: a systematic review and meta-analysis

    Karen L Tang;Niamh P Caffrey;Diego B Nóbrega;Susan C Cork

  • Risk of Surgery for Inflammatory Bowel Diseases Has Decreased Over Time: A Systematic Review and Meta-analysis of Population-Based Studies

    Alexandra D. Frolkis;Jonathan Dykeman;María E. Negrón;Jennifer deBruyn

  • Invited Review: The Role of Cow, Pathogen, and Treatment Regimen in the Therapeutic Success of Bovine Staphylococcus aureus Mastitis

    H.W. Barkema;Y.H. Schukken;R.N. Zadoks

  • Incidence of Clinical Mastitis in Dairy Herds Grouped in Three Categories by Bulk Milk Somatic Cell Counts

    H.W. Barkema;Y.H. Schukken;T.J.G.M. Lam;M.L. Beiboer

  • Invited review: Changes in the dairy industry affecting dairy cattle health and welfare.

    H.W. Barkema;M.A.G. von Keyserlingk;J.P. Kastelic;T.J.G.M. Lam

  • Incidence Rate of Clinical Mastitis on Canadian Dairy Farms

    R.G.M. Olde Riekerink;H.W. Barkema;D.F. Kelton;D.T. Scholl

  • Invited review: Mastitis in dairy heifers: Nature of the disease, potential impact, prevention, and control

    S. De Vliegher;L.K. Fox;S. Piepers;S. McDougall

  • 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.

    C.H.J. Kalis;M.T. Collins;J.W. Hesselink;H.W. Barkema

  • Management Practices Associated with the Incidence Rate of Clinical Mastitis

    H.W. Barkema;Y.H. Schukken;T.J.G.M. Lam;M.L. Beiboer

  • The effect of season on somatic cell count and the incidence of clinical mastitis

    R. G. Olde Riekerink;H. W. Barkema;Henrik E. Stryhn

  • Management practices associated with low, medium, and high somatic cell counts in bulk milk

    H.W. Barkema;Y.H. Schukken;T.J.G.M. Lam;M.L. Beiboer

  • Management style and its association with bulk milk somatic cell count and incidence rate of clinical mastitis.

    H.W. Barkema;J.D. Van der Ploeg;Y.H. Schukken;T.J.G.M. Lam

  • Incidence of primary sclerosing cholangitis: a systematic review and meta-analysis.

    Natalie A. Molodecky;Hashim Kareemi;Rohan Parab;Herman W. Barkema

  • Cow- and Quarter-Level Risk Factors for Streptococcus uberis and Staphylococcus aureus Mastitis

    R.N. Zadoks;H.G. Allore;H.W. Barkema;O.C. Sampimon

  • Environmental particulate matter induces murine intestinal inflammatory responses and alters the gut microbiome.

    Lisa Kish;Naomi Hotte;Gilaad G. Kaplan;Renaud Vincent

  • Control of paratuberculosis: who, why and how. A review of 48 countries

    Richard Whittington;Karsten Donat;Maarten F. Weber;David Kelton

  • Johne's disease in Canada Part I: clinical symptoms, pathophysiology, diagnosis, and prevalence in dairy herds.

    Ashwani Tiwari;John A. VanLeeuwen;Shawn L.B. McKenna;Greg P. Keefe

  • Prevalence of lameness and associated risk factors in Canadian Holstein-Friesian cows housed in freestall barns.

    L. Solano;H.W. Barkema;E.A. Pajor;S. Mason

  • Factors associated with cure after therapy of clinical mastitis caused by Staphylococcus aureus.

    J. Sol;O.C. Sampimon;H.W. Barkema;Y.H. Schukken

Frequent Co-Authors

Ynte H. Schukken
Ynte H. Schukken Wageningen University & Research
Gilaad G. Kaplan
Gilaad G. Kaplan University of Calgary
Karin Orsel
Karin Orsel University of Calgary
Subrata Ghosh
Subrata Ghosh University College Cork
Remo Panaccione
Remo Panaccione University of Calgary
Henk Hogeveen
Henk Hogeveen Wageningen University & Research
Geert Opsomer
Geert Opsomer Ghent University
Theo J.G.M. Lam
Theo J.G.M. Lam Utrecht University
Ruth N. Zadoks
Ruth N. Zadoks University of Sydney
John P. Kastelic
John P. Kastelic University of Calgary

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Related Online Degrees & Career Pathways

For those interested in expanding their expertise beyond Animal Science and Veterinary studies, several related online degrees offer valuable career pathways. Programs like nasp accredited programs provide specialized training in school psychology, which can complement work in animal-assisted therapy or behavioral research.

Similarly, exploring apa-accredited psyd programs could be beneficial for those seeking advanced clinical training without the GRE requirement, broadening skills applicable to mental health support in veterinary settings.

For professionals aiming to support individuals with substance use challenges, online colleges for addiction counseling offer flexible degree options that align well with roles in rehabilitation services for both humans and animals affected by addiction-related issues.

Additionally, careers in family dynamics and therapeutic support may be enhanced through marriage and family therapy masters programs online, which provide accessible pathways to help families and individuals, including those managing the welfare of pets and livestock.

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