Ernest Hovingh, DVM, PhD

Extension Veterinarian


    Mastitis and Milk Quality
    Milking Equipment Performance
    Bovine Hoof Health
    On-farm Food Safety



    About Me

    Program Areas

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


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

    Professional Experience

    2004-Present: Senior Research Associate, Veterinary Extension and Field Investigation, Department of Veterinary 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.


    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 DV