Johne's Disease Contacts

Contact information for various people involved with Johne's Disease efforts in Pennsylvania.
Johne's Disease Contacts - Articles


Contact information is provided for various individuals involved with Johne's Disease efforts in Pennsylvania. If you are uncertain whom you should contact, please send an email to Dr. Ernest Hovingh (, or call him at (814) 863-8526.

General Johne's Disease Information

Questions related to individual cow and herd Johne's epidemiology, testing, risk assessments and herd management plans, and veterinary certification.

Ernest Hovingh
Veterinary Extension & Applied Research Lab
Department of Veterinary and Biomedical Science, Penn State
126 Central Milk Testing Lab
University Park, PA 16802
814-865-3907 (fax)

PA Department of Agriculture Johne's Program Contact

Overall coordination and supervision of Johne's activities and Herd Certification in Pennsylvania.

Dr. David Zellner
Bureau of Animal Health
Pennsylvania Department of Agriculture
2301 North Cameron Street
Harrisburg, PA 17110

Johne's Program Herds Administrator

Administration of PA Johne's Program herd certification.

Anja Walker
Pennsylvania Department of Agriculture

Johne's Microbiology Laboratory

For information related to sample submission guidelines, and scheduling of herd sampling.

Deepanker Tewari
Manager, Microbiology and Molecular Biology Services
PADLS, Harrisburg Laboratory