About Us

Pacific Zoo & Wildlife Diagnostics, Veterinary Corporation was a privately-owned veterinary disease diagnostic consultation service based in San Diego, CA. PZWD’s services are currently transitioning to the School of Veterinary Medicine at the University of Wisconsin-Madison. The new laboratory will continue to to provide consultation, histopathology, and cytology services to exotic animal veterinarians, researchers, governmental and private conservation organizations, and zoological collections.  PZWD strives to provide the highest quality services to our clients with personal attention and rapid turn-around times.




David J. Gasper, DVM, PhD, Dipl. ACVP   pathology@pzwd.us 

Dr. Gasper is the founder, President, and CEO of Pacific Zoo & Wildlife Diagnostics, Veterinary Corporation. He is a veterinary anatomic pathologist and comparative immunologist with residency training and experience in zoo & wildlife diseases and immunology of infectious diseases. He received his DVM degree from Kansas State University, PhD in Immunology (Comparative Biomedical Sciences – Immunology) from the University of Wisconsin-Madison, and completed an anatomic pathology residency with zoo/wildlife emphasis at the University of California-Davis and the San Diego Zoo. He is board certified in veterinary anatomic pathology by the American College of Veterinary Pathologists and a member of the American Association of Immunologists.

Through its partnership with PZWD, Dr. Gasper also serves as Chief of Exotic Companion Animal, Zoo Animal, and Wildlife Pathology for Animal Reference Pathology, LLC, a private veterinary diagnostic laboratory based in Salt Lake City, UT.  He also provides exotic animal histopathology services for Zoo/Exotics Pathology in Carmichael, CA and Asia Veterinary Diagnostics for clients in Hong Kong, Singapore, and Malaysia.

Dr. Gasper’s passion is wildlife conservation and he enjoys assisting non-governmental conservation organizations, federal agencies, wildlife rescue organizations,  researchers, and private veterinarians in diagnosing and understanding diseases in a broad array of non-domestic species. His research interests include animal models of human diseases with an emphasis on cell-mediated immunity to infection with influenza and other respiratory viruses.  He enjoys giving professional and continuing education seminars on the pathology of non-domestic animals and animal models of human disease, and has published peer-reviewed articles on diverse subjects ranging from diagnostic veterinary pathology to ferret models of fatal pandemic influenza and influenza vaccine development.

Dr. Gasper maintains active membership in the following professional organizations: