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Animal Science and Veterinary
Canada
2026

D-Index & Metrics

Animal Science and Veterinary

D-Index
88
Citations
26120
World Ranking
38
National Ranking
6

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

What is he best known for?

The fields of study he is best known for:

  • Internal medicine
  • Bacteria
  • Disease

His primary areas of investigation include Dairy cattle, Animal science, Herd, Lactation and Mastitis. His Dairy cattle research integrates issues from Endocrinology, Retained placenta, Ketosis, Postpartum period and Internal medicine. Ken E. Leslie combines subjects such as Ice calving, Artificial insemination and Colostrum, Antibody, Passive immunity with his study of Animal science.

His Herd study is concerned with the field of Veterinary medicine as a whole. His Lactation research is multidisciplinary, relying on both Peripartum Period and Disease course. His work deals with themes such as Biotechnology, Staphylococcus aureus, Immunology and Somatic cell count, which intersect with Mastitis.

His most cited work include:

  • Defining and diagnosing postpartum clinical endometritis and its impact on reproductive performance in dairy cows. (540 citations)
  • Endometrial cytology and ultrasonography for the detection of subclinical endometritis in postpartum dairy cows. (421 citations)
  • Impact of hyperketonemia in early lactation dairy cows on health and production. (410 citations)

What are the main themes of his work throughout his whole career to date?

Ken E. Leslie mainly focuses on Animal science, Dairy cattle, Herd, Mastitis and Ice calving. The Animal science study combines topics in areas such as Pregnancy, Lactation, Endocrinology, Veterinary medicine and Internal medicine. His work carried out in the field of Dairy cattle brings together such families of science as Ketosis, Postpartum period, Monensin, Placebo and Milk production.

His research integrates issues of Milking, California mastitis test and Immunology in his study of Herd. His study looks at the relationship between Mastitis and fields such as Somatic cell count, as well as how they intersect with chemical problems. His Ice calving research includes elements of NEFA, Abomasum, Colostrum and Retained placenta.

He most often published in these fields:

  • Animal science (55.67%)
  • Dairy cattle (29.55%)
  • Herd (28.52%)

What were the highlights of his more recent work (between 2010-2020)?

  • Animal science (55.67%)
  • Dairy cattle (29.55%)
  • Ice calving (24.74%)

In recent papers he was focusing on the following fields of study:

Ken E. Leslie focuses on Animal science, Dairy cattle, Ice calving, Mastitis and Herd. He has included themes like Veterinary medicine, Pregnancy, Lactation and Colostrum in his Animal science study. His Dairy cattle research includes themes of Body weight, Birth weight, Milk production and FLUNIXIN MEGLUMINE.

Ken E. Leslie has included themes like Placebo, Scoring system, Bovine respiratory disease and Vitality in his Ice calving study. His Mastitis research incorporates elements of Internal medicine, Surgery, Cephapirin sodium and Somatic cell count. The Herd study combines topics in areas such as Metritis, Retained placenta, Lower risk, Milking and Random effects model.

Between 2010 and 2020, his most popular works were:

  • Factors associated with morbidity, mortality, and growth of dairy heifer calves up to 3 months of age (215 citations)
  • The association of serum metabolites in the transition period with milk production and early-lactation reproductive performance. (138 citations)
  • The selective treatment of clinical mastitis based on on-farm culture results: I. Effects on antibiotic use, milk withholding time, and short-term clinical and bacteriological outcomes. (132 citations)

In his most recent research, the most cited papers focused on:

  • Internal medicine
  • Bacteria
  • Disease

His scientific interests lie mostly in Animal science, Dairy cattle, Mastitis, Lactation and Herd. His Animal science study combines topics in areas such as Feeding behavior, Automatic milking and Colostrum. His biological study spans a wide range of topics, including Weight gain, Incidence and Postpartum period.

His Mastitis study integrates concerns from other disciplines, such as Veterinary medicine, Dairy industry, Cephapirin sodium and Early detection. His Lactation research is mostly focused on the topic Ice calving. His Herd research is multidisciplinary, incorporating elements of Metritis, Retained placenta, Internal medicine, Randomized controlled trial and Milking.

Best Publications

  • Defining and diagnosing postpartum clinical endometritis and its impact on reproductive performance in dairy cows.

    S.J. LeBlanc;T.F. Duffield;K.E. Leslie;K.G. Bateman

  • Impact of hyperketonemia in early lactation dairy cows on health and production.

    T.F. Duffield;K.D. Lissemore;B.W. McBride;K.E. Leslie

  • Endometrial cytology and ultrasonography for the detection of subclinical endometritis in postpartum dairy cows.

    R Kasimanickam;T.F Duffield;R.A Foster;C.J Gartley

  • Major Advances in Disease Prevention in Dairy Cattle

    S.J. LeBlanc;K.D. Lissemore;D.F. Kelton;T.F. Duffield

  • Alteration in immune responsiveness during the peripartum period and its ramification on dairy cow and calf health

    B A Mallard;J C Dekkers;M J Ireland;K E Leslie

  • Metabolic Predictors of Displaced Abomasum in Dairy Cattle

    S.J. LeBlanc;K.E. Leslie;T.F. Duffield

  • Factors associated with morbidity, mortality, and growth of dairy heifer calves up to 3 months of age

    M.C. Windeyer;K.E. Leslie;S.M. Godden;D.C. Hodgins

  • Risk factors for postpartum uterine diseases in dairy cows.

    J. Dubuc;T.F. Duffield;K.E. Leslie;J.S. Walton

  • The effect of subclinical ketosis in early lactation on reproductive performance of postpartum dairy cows.

    R.B. Walsh;J.S. Walton;D.F. Kelton;S.J. LeBlanc

  • Definitions and diagnosis of postpartum endometritis in dairy cows.

    J. Dubuc;T.F. Duffield;K.E. Leslie;J.S. Walton

  • Evaluation of changes in somatic cell counts as indicators of new intramammary infections

    Ian R. Dohoo;K. E. Leslie

  • Use of test day milk fat and milk protein to detect subclinical ketosis in dairy cattle in Ontario.

    T F Duffield;D F Kelton;K E Leslie;K D Lissemore

  • Sensitivity and specificity of somatic cell count and California Mastitis Test for identifying intramammary infection in early lactation.

    J.M. Sargeant;K.E. Leslie;J.E. Shirley;B.J. Pulkrabek

  • An evaluation of Brix refractometry instruments for measurement of colostrum quality in dairy cattle

    V. Bielmann;J. Gillan;N.R. Perkins;A.L. Skidmore

  • The association of serum metabolites in the transition period with milk production and early-lactation reproductive performance.

    N. Chapinal;M. E. Carson;S. J. LeBlanc;K. E. Leslie

  • A comparison of the cytobrush and uterine lavage techniques to evaluate endometrial cytology in clinically normal postpartum dairy cows

    Ramanathan Kasimanickam;Todd F Duffield;Robert A Foster;Cathy J Gartley

  • Efficacy of Monensin for the Prevention of Subclinical Ketosis in Lactating Dairy Cows

    T.F. Duffield;D. Sandals;K.E. Leslie;K. Lissemore

  • The effect of treatment of clinical endometritis on reproductive performance in dairy cows

    S. J. LeBlanc;T. F. Duffield;K. E. Leslie;K. G. Bateman

  • Metabolic predictors of post-partum disease and culling risk in dairy cattle.

    Hesam A. Seifi;Stephen J. LeBlanc;Ken E. Leslie;Todd F. Duffield

  • The selective treatment of clinical mastitis based on on-farm culture results: I. Effects on antibiotic use, milk withholding time, and short-term clinical and bacteriological outcomes.

    A. Lago;S.M. Godden;R. Bey;P.L. Ruegg

  • Association of cow and quarter-level factors at drying-off with new intramammary infections during the dry period.

    R.T Dingwell;K.E Leslie;Y.H Schukken;J.M Sargeant

  • Herd-level association of serum metabolites in the transition period with disease, milk production, and early lactation reproductive performance.

    N. Chapinal;S.J. LeBlanc;M.E. Carson;K.E. Leslie

  • Effect of treatment with progesterone on pregnancy rate and plasma concentrations of progesterone in Holstein cows.

    Nancy A. Robinson;Kenneth E. Leslie;John S. Walton

  • The effect of a single administration of cephapirin or cloprostenol on the reproductive performance of dairy cows with subclinical endometritis

    R. Kasimanickam;T.F. Duffield;R.A. Foster;C.J. Gartley

  • Evaluation of a Brix refractometer to estimate serum immunoglobulin G concentration in neonatal dairy calves

    S.M. Deelen;T.L. Ollivett;D.M. Haines;K.E. Leslie

Frequent Co-Authors

Todd F. Duffield
Todd F. Duffield University of Guelph
Stephen J. LeBlanc
Stephen J. LeBlanc University of Guelph
David F. Kelton
David F. Kelton University of Guelph
Kerry D. Lissemore
Kerry D. Lissemore University of Guelph
Trevor J. DeVries
Trevor J. DeVries University of Guelph
Ynte H. Schukken
Ynte H. Schukken Wageningen University & Research
Jan M. Sargeant
Jan M. Sargeant University of Guelph
Ian R. Dohoo
Ian R. Dohoo University of Prince Edward Island
Sandra M Godden
Sandra M Godden University of Minnesota
R. Bagg
R. Bagg Eli Lilly (United States)

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Related Online Degrees & Career Pathways

Exploring a degree in Animal Science and Veterinary fields opens doors to various interdisciplinary career opportunities, especially those involving health and counseling. Many students interested in supporting animal welfare and human-animal relationships also consider related fields in mental health and therapy.

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Online masters in marriage and family therapy offer additional pathways to specialize in strengthening family dynamics, an important aspect often related to pet ownership and animal-assisted therapy programs. These flexible programs help professionals gain skills to support families through various challenges.

Advancing to an online doctorate in counseling allows for deeper research and leadership roles in therapeutic fields, which can intersect with veterinary behavioral studies or animal-assisted interventions. Many aspiring counselors prefer the convenience of online psyd programs accredited by apa to meet academic excellence without GRE requirements.

By integrating these related online degrees, graduates can enhance their career options and contribute more effectively to both animal health and human well-being.

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