Ernest Hovingh, DVM, PhD

  • Extension Veterinarian
  • Associate Research Professor
Ernest Hovingh, DVM, PhD
126 Central Milk Testing Laboratory
Apple Lane

University Park, PA 16802
Work Phone: 814-863-8526

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


  1. PhD, Epidemiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI, Canada, 1998
  2. Residency, Dairy Ambulatory Medicine, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PEI, Canada, 1995
  3. 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

2004-Present: Associate Research Professor, 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.

Selected Publications

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.

Van Kessel, J.S., J.S. Karns, D.R. Wolfgang, and E. Hovingh. "Regional Distribution of Two Dairy-Associated Salmonella enterica Serotypes."  (2013). Foodborne Pathogens and Disease, 10(5): 448-452.

Van Kessel, J. S., J. S. Karns, D. R. Wolfgang, E. Hovingh, and Y. H. Schukken.  (2012). Dynamics of Salmonella serotype shifts in an endemically infected dairy herd. Foodborne Pathogens and Disease, 9:319-324.

Pradhan, A.K., R.M. Mitchell, A.J. Kramer, M.J. Zurakowski, T.L. Fyock, R.H. Whitlock, J.M. Smith, E. Hovingh, J.S. Van Kessel, J.S. Karns, and Y.H. Schukken. "Molecular Epidemiology of Mycobacterium avium subsp. paratuberculosis in a Longitudinal Study of Three Dairy Herds." (2011). J. Clin Microbiol., 49(3):893-901.

Aly, S.S., B.L. Mangold, R.H. Whitlock, R.W. Sweeney, R.J. Anderson, J.Jiang, Y.H. Shukken, E. Hovingh, D. Wolfgang, J.S. Van Kessel, J.S. Karns, J.E. Lombard, J.M. Smith, and I.A. Gardner. "Correlation between Herrold's egg yolk medium culture and real-time quantitative polymerase chain reaction results for Mycobacterium avium subspecies paratuberculosis in pooled fecal and environmental samples." (2010).  J Vet Diagn Invest., 22(5): 677-83.

Pradhan, A.K., J.S. Van Kessel, J.S. Karns, D.R. Wolfgang, E. Hovingh, K.A. Nelen, J.M.Smith, R.H. Whitlock, T. Fyock, T. S. Ladely, P.J. Fedorka-Cray, Y.H. Schukken. "Dynamics of endemic infectious diseases of animal and human importance on three dairy herds in the northeastern United States." (2009). J. Dairy Sci., 92:1811-1825.

Van Kessel, J.S., J.S. Karns, D.R. Wolfgang, E. Hovingh, B.M. Jayarao, C.P. Van Tassell, Y.H. Schukken. "Environmental Sampling to Predict Fecal Prevalence of Salmonella in an Intensively Monitored Dairy Herd." (2008).  J. Food Protection, 71:1967-1973.

Chapagain, P.P., J.S. Van Kessel, J.S. Karns, D.R. Wolfgang, E. Hovingh, K.A. Nelen, Y.H. Schukken, and Y.T. Grohn. "A Mathematical Model of the Dynamics of Salmonella Cerro Infection in a US Dairy Herd." (2008). Epidemiology and Infection, 136:263-272.

Research Interests

Veterinary Extension Faculty
  • Johnes Disease Control and Pennsylvania Program
  • Lameness
  • Milking Parlor Management
  • On-Farm Epidemiology
  • Animal Welfare and Well Being