Devin Holman, Ph.D.

Research Scientist

Livestock Microbiology

Current research and/or projects

  • Understanding the dynamics of the swine gut microbiome in response to perturbations and weaning.
  • Sow milk microbiome and resistome
  • Nasopharyngeal microbiome of beef cattle and the development of bovine respiratory disease.
  • Developing antimicrobial alternatives for use in swine production.

Professional activities / interests

Editorial Board Member, Applied and Environmental Microbiology, 2020-present 

Chair, Lacombe Research and Development Centre Animal Care Committee, 2018-present

Education and awards

Ph.D., Microbiology, McGill University

M.Sc., Food Microbiology, Dalhousie University

B.Sc. (Hons.), Environmental Biology, Nova Scotia Agricultural College (Dalhousie University)                       

International experience and/or work

ORISE Postdoctoral Fellow, United States Department of Agriculture, National Animal Disease Center, Ames, IA, USA, 2016-17.

Key publications

  1. Klima, C.L., Holman, D.B., Ralston, B.J., Stanford, K., Zaheer, R., Alexander, T.W., McAllister, T.A. (2019). Lower Respiratory Tract Microbiome and Resistome of Bovine Respiratory Disease Mortalities, 78(2), 446-456.

    2019 - View publication details

  2. Holman, D.B., Yang, W., Alexander, T.W. (2019). Antibiotic treatment in feedlot cattle: A longitudinal study of the effect of oxytetracycline and tulathromycin on the fecal and nasopharyngeal microbiota, 7(1),

    2019 - View publication details

  3. Holman, D.B., Gzyl, K.E. (2019). A meta-analysis of the bovine gastrointestinal tract microbiota, 95(6),

    2019 - View publication details

  4. Holman, D.B., Bearson, B.L., Allen, H.K., Shippy, D.C., Loving, C.L., Kerr, B.J., Bearson, S.M.D., Brunelle, B.W. (2019). Chlortetracycline enhances tonsil colonization and fecal shedding of multidrug-resistant Salmonella enterica serovar typhimurium DT104 without major alterations to the porcine tonsillar and intestinal microbiota, 85(4),

    2019 - View publication details

  5. Holman, D.B., Hao, X., Topp, E., Yang, H.E., Alexander, T.W. (2016). Effect of co-composting cattle manure with construction and demolition waste on the archaeal, bacterial, and fungal microbiota, and on antimicrobial resistance determinants, 11(6), 1-21.

    2016 - View publication details

  6. Timsit, E., Workentine, M., Schryvers, A.B., Holman, D.B., van der Meer, F., Alexander, T.W. (2016). Evolution of the nasopharyngeal microbiota of beef cattle from weaning to 40 days after arrival at a feedlot, 187 75-81.

    2016 - View publication details

  7. Holman, D.B., Timsit, E., Alexander, T.W. (2015). The nasopharyngeal microbiota of feedlot cattle, 5

    2015 - View publication details

  8. Holman, D.B., McAllister, T.A., Topp, E., Wright, A.D.G., Alexander, T.W. (2015). The nasopharyngeal microbiota of feedlot cattle that develop bovine respiratory disease, 180(1-2), 90-95.

    2015 - View publication details

Research facility

6000 C and E Trail
Lacombe, AB T4L 1W1


• American Society for Microbiology
• Canadian Society of Microbiologists

• International Society for Microbial Ecology