Ernest Hovingh, DVM, PhD

Ernest Hovingh, DVM, PhD

  • Resident Director, Animal Diagnostic Lab
  • Research Professor
  • Extension Veterinarian
  • Veterinary Extension Team Leader
Animal Diagnostic Lab
Wiley Lane

University Park, PA 16802

Areas of Expertise

  • Mastitis and Milk Quality
  • Milking Equipment Performance
  • Bovine Hoof Health
  • Antimicrobial Resistance
  • On-farm Food Safety
  • Johne's Disease
  • Biosecurity and Infectious Disease Management
  • Epidemiology


  • PhD, Epidemiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI, Canada, 1998
  • Residency, Dairy Ambulatory Medicine, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI, Canada, 1995
  • DVM, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada, 1990

Program Areas

  • Biosecurity and Infectious Disease Control
  • Lameness
  • Milking Parlor Management
  • Johne's Disease
  • On-Farm Epidemiology
  • Animal Welfare and Well-Being


  • American Association of Extension Veterinarians
  • International Society for Veterinary Epidemiology and Economics
  • National Mastitis Council
  • Pennsylvania Veterinary Medical Association
  • United States Animal Health Association

Professional Experience

2021-present: Research Professor & Extension Veterinarian, Veterinary Extension and Field Investigation, Department of Veterinary & Biomedical Science, Pennsylvania State University.

2004-2021: Associate Research Professor & Extension Veterinarian, Veterinary Extension and Field Investigation, Department of Veterinary & Biomedical Science, Pennsylvania State University.

1999-2003: Assistant Professor of Ruminant Health/Veterinary Extension Specialist, Virginia-Maryland Regional College of Veterinary Medicine, Blacksburg, VA. 

1998: Lecturer, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, Canada. 

1990-1992: Associate Veterinarian, Ontario, Canada.

Publications (since 2014)

Salaheen, S., S.W. Kim, E.P. Hovingh, J.A. Van Kessel, B.J. Haley. Metagenomic Analysis of the Microbial Communities and Resistomes of Veal Calf Feces. (2021). Front. Microbiology. Vol. 11(2).

Barragan, A., E.P. Hovingh, S.L. Bas, L. Byler. Effects of postpartum acetylsalicylic acid on the incidence of uterine diseases and reproductive performance in dairy cattle. (2021). J. Dairy Sci Communications. In press: Available on-line 1/22/2021.

Barragan, A., E.P. Hovingh, S. Bas, J. Lakritz, L. Byler, A. Ludwikowski, S. Takitch, J. Zug, S. Hann. Effects of postpartum acetylsalicylic acid on metabolic status, health, and production in lactating dairy cattle. (2020). J. Dairy Sci., 103(9), 8443-8452.

Haley, B. J., Kim, S. W., Salaheen, S., Hovingh, E. P., & Van Kessel, J. A. Differences in the Microbial Community and Resistome Structures of Feces from Preweaned Calves and Lactating Dairy Cows in Commercial Dairy Herds. (2020). Foodborne Pathogens and Disease, 17(8), 494-503.

Salaheen, S., H. Cao, J.L. Sonnier, S.W. Kim, L.P. Del Collo, E. Hovingh, J.S. Karns, B.J. Haley, J.A.S. Van Kessel. “Diversity of Extended-Spectrum Cephalosporin-Resistant Escherichia  coli in Feces from Calves and Cows on Pennsylvania Dairy Farms.” (2019) Foodborne Pathog and Dis. 16(5):1-3.

Salaheen, S., S.W. Kim, H. Cao, D.R. Wolfgang, E. Hovingh, J.S. Karns, B.J. Haley and J.A.S. Van Kessel. "Antimicrobial resistance among Escherichia coli isolated from veal calf operations in Pennsylvania." (2019) Foodborne Pathog and Dis. 16(1):74-80.

Cao, H., A.K. Pradhan, J. S. Karns, E. Hovingh, D.R. Wolfgang, B.T. Vinyard, S.W. Kim, S. Salaheen, B.J. Haley, and J.A. Van Kessel. “Age-Associated Distribution of Antimicrobial-Resistant Salmonella enterica and Escherichia coli Isolated from Dairy Herds in Pennsylvania, 2013–2015.” (2019) Foodborne Pathog and Dis. 16(1):60-67.

Salaheen, S., S.W. Kim, J.S. Karns, E. Hovingh, B.J. Haley, J. A.S. Van Kessel. “Metagenomic analysis of the fecal microbiomes from Escherichia coli O157: H7-shedding and non-shedding cows on a single dairy farm. (2019) Food Control. 102:76-80.

Springer, H.R., T.N. Denagamage, G.D. Fenton, B.J. Haley, J.A.S. VanKessel and E.P. Hovingh. "Antimicrobial resistance in fecal Escherichia coli and Salmonella enterica from dairy calves: a systematic review." (2019) Foodborne Pathog and Dis. 16(1):23-34.

Byukusenge, M., R. Nissly, S.M. Kasibhatla, L. Li, R. Russell, H. Springer, R. Barry, R. Van Saun, D. Wolfgang, E. Hovingh, U. Kulkarni-Kale, and S. V. Kuchipudi. “Complete Genome Sequences of Four Bovine Coronavirus Isolates from Pennsylvania.” (2018) Microbiology Resource Announcements. 6(22).

Cao, H., A.K. Pradhan, J.S. Karns, D.R. Wolfgang, E. Hovingh, B. T. Vinyard and J.A.S. Van Kessel.“Prevalence and risk factors for antimicrobial resistance on U.S. dairy operations.” (2017) J. Animal Science, Vol. 95, Supp 4: 131-132.

Beaver, A., R.W.Sweeney, E.Hovingh, D.R.Wolfgang., Y.T.Gröhn, Y.H.Schukken. “Longitudinal relationship between fecal culture, fecal quantitative PCR, and milk ELISA in Mycobacterium avium ssp. paratuberculosis-infected cows from low-prevalence dairy herds.” (2017) J Dairy Science, 100(9): 7507-7521.

Schewe, R.L., J. Kayitsinga, G.A. Contreras, C. Odom, W.A. Coats, P Durst, E.P. Hovingh, R.O. Martinez, R. Mobley, S. Moore, and R.J. Erskine.  "Herd Management and Social Variables Associated with Bulk Tank Somatic Cell Counts in Dairy Herds in the Eastern United States." (2015).  J. Dairy Science, 98(11): 7650-7665.

Haley, B.J., M. Allard, E. Brown, E. Hovingh, J.S. Karns, and J.S.van Kessel. "Molecular Detection of the Index Case of a Subclinical Salmonella Kentucky Epidemic on a Dairy Farm." (2015). Epidemiology and Infection, 143(04): 682-686.

Lu, Z., Y.T. Gröhn, R.L. Smith, J.S. Karns, E. Hovingh, and Y.H. Schukken. "Stochastic Modeling of Imperfect Salmonella Vaccines in an Adult Dairy Herd." (2014). Bulletin of Mathematical Biology. 76(3):541-565.

Tewari, D., E. Hovingh, R. Linscott, E. Martel, J. Lawrence, D. Wolfgang, and D. Griswold. "Mycobacterium avium subsp. paratuberculosis Antibody Response, Fecal Shedding, and Antibody Cross-Reactivity to Mycobacterium bovis in M. avium subsp. paratuberculosis-Infected Cattle Herds Vaccinated against Johne's Disease."  (2014). Clin Vaccine Immunol., 21(5): 698-703.