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

Herman W. Barkema publication distribution in Animal Science and Veterinary in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Animal Science and Veterinary in 2026. The highlighted bar marks where Herman W. Barkema sits on this spectrum.

29–33 publications: 1 scientists 34–38 publications: 6 scientists 39–43 publications: 17 scientists 44–48 publications: 23 scientists 49–53 publications: 28 scientists 54–58 publications: 44 scientists 59–63 publications: 66 scientists 64–68 publications: 75 scientists 69–73 publications: 71 scientists 74–78 publications: 85 scientists 79–83 publications: 108 scientists 84–88 publications: 105 scientists 89–93 publications: 84 scientists 94–98 publications: 103 scientists 99–103 publications: 97 scientists 104–108 publications: 95 scientists 109–113 publications: 89 scientists 114–118 publications: 88 scientists 119–123 publications: 109 scientists 124–128 publications: 93 scientists 129–133 publications: 89 scientists 134–138 publications: 95 scientists 139–143 publications: 92 scientists 144–148 publications: 80 scientists 149–153 publications: 75 scientists 154–158 publications: 74 scientists 159–163 publications: 67 scientists 164–168 publications: 53 scientists 169–173 publications: 62 scientists 174–178 publications: 63 scientists 179–183 publications: 50 scientists 184–188 publications: 55 scientists 189–193 publications: 50 scientists 194–198 publications: 27 scientists 199–203 publications: 44 scientists 204–208 publications: 31 scientists 209–213 publications: 28 scientists 214–218 publications: 38 scientists 219–223 publications: 33 scientists 224–228 publications: 36 scientists 229–233 publications: 29 scientists 234–238 publications: 35 scientists 239–243 publications: 23 scientists 244–248 publications: 24 scientists 249–253 publications: 29 scientists 254–258 publications: 28 scientists 259–263 publications: 21 scientists 264–268 publications: 25 scientists 269–273 publications: 11 scientists 274–278 publications: 18 scientists 279–283 publications: 13 scientists 284–288 publications: 18 scientists 289–293 publications: 10 scientists 294–298 publications: 12 scientists 299–303 publications: 11 scientists 304–308 publications: 15 scientists 309–313 publications: 14 scientists 314–318 publications: 14 scientists 319–323 publications: 8 scientists 324–328 publications: 8 scientists 329–333 publications: 13 scientists 334–338 publications: 14 scientists 339–343 publications: 13 scientists 344–348 publications: 10 scientists 349–353 publications: 11 scientists 354–358 publications: 5 scientists 359–363 publications: 8 scientists 364–368 publications: 8 scientists 369–373 publications: 6 scientists 374–378 publications: 7 scientists 379–383 publications: 8 scientists 384–388 publications: 3 scientists 389–393 publications: 4 scientists 394–398 publications: 5 scientists 399–403 publications: 8 scientists 404–408 publications: 5 scientists 409–413 publications: 4 scientists 414–418 publications: 3 scientists 419–423 publications: 8 scientists 424–428 publications: 5 scientists 429–433 publications: 3 scientists 434–438 publications: 5 scientists 439–441 publications: 5 scientists 442+ publications: 99 scientists
29 publications 442+

This scientist: 531 publications — 98th percentile

98% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 442 publications or more.

Herman W. Barkema D-index placement in Animal Science and Veterinary in 2026

The chart shows the D-index (discipline H-index) distribution of Animal Science and Veterinary scientists ranked by Research.com in 2026. The highlighted bar marks where Herman W. Barkema sits on this spectrum.

20 D-Index: 5 scientists 21 D-Index: 22 scientists 22 D-Index: 31 scientists 23 D-Index: 44 scientists 24 D-Index: 53 scientists 25 D-Index: 66 scientists 26 D-Index: 80 scientists 27 D-Index: 101 scientists 28 D-Index: 106 scientists 29 D-Index: 116 scientists 30 D-Index: 154 scientists 31 D-Index: 158 scientists 32 D-Index: 143 scientists 33 D-Index: 137 scientists 34 D-Index: 126 scientists 35 D-Index: 134 scientists 36 D-Index: 112 scientists 37 D-Index: 115 scientists 38 D-Index: 105 scientists 39 D-Index: 111 scientists 40 D-Index: 107 scientists 41 D-Index: 87 scientists 42 D-Index: 74 scientists 43 D-Index: 62 scientists 44 D-Index: 61 scientists 45 D-Index: 41 scientists 46 D-Index: 51 scientists 47 D-Index: 43 scientists 48 D-Index: 28 scientists 49 D-Index: 47 scientists 50 D-Index: 40 scientists 51 D-Index: 34 scientists 52 D-Index: 33 scientists 53 D-Index: 43 scientists 54 D-Index: 16 scientists 55 D-Index: 32 scientists 56 D-Index: 21 scientists 57 D-Index: 18 scientists 58 D-Index: 28 scientists 59 D-Index: 33 scientists 60 D-Index: 17 scientists 61 D-Index: 21 scientists 62 D-Index: 18 scientists 63 D-Index: 21 scientists 64 D-Index: 9 scientists 65 D-Index: 20 scientists 66 D-Index: 11 scientists 67 D-Index: 16 scientists 68 D-Index: 12 scientists 69 D-Index: 17 scientists 70 D-Index: 13 scientists 71 D-Index: 15 scientists 72 D-Index: 11 scientists 73 D-Index: 11 scientists 74 D-Index: 14 scientists 75 D-Index: 5 scientists 76 D-Index: 6 scientists 77+ D-Index: 100 scientists
20 D-Index 77+

This scientist: 100 D-Index — 99th percentile

99% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 77 D-Index or more.

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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