College of Veterinary Medicine

Veterinary Microbiology and Pathology

Allan PessierAllan Pessier, DVM, DACVP

Clinical Associate Professor
Office: 509-335-3877


  • DVM, Washington State University
  • Residency, Veterinary Anatomic Pathology, Smithsonian National Zoological Park
  • Fellowship, Zoo and Wildlife Pathology, Zoological Society of San Diego

  • I have a special interest in amphibian pathology and laboratory diagnostics for important infectious diseases such as chytridiomycosis caused by Batrachochytrium dendrobatidis and B. salamandrivorans and ranaviruses. Many of my projects focus on the control of disease in conservation programs for endangered amphibians, both within the United States and internationally. 


    1. White CL, Forzan MJ, Pessier AP, Allender MC, Ballard JR, Catenazzi A, Fenton H, Martel A, Pasmans F, Miller DL, Ossiboff RJ, Richgels KLD, Kerby JL. 2016. A case definition for Batrachochytrium salamandrivorans chytridiomycosis. Herpetological Review  47: 207-209.
    2. Pessier, A.P., J. Stern, and C.W. Witte. 2016. TP53 gene and cancer resistance in elephants.  Journal of the American Medical Association 315: 1789.
    3. Pessier AP, Baitchman EJ, Crump P, Wilson B, Griffith E, Ross H. 2014. Causes of mortality in anuran amphibians from an ex-situ survival assurance colony in Panama. Zoo Biology 33: 516-526.
    4. Cheng K, Jones MEB, Jancovich JK, Burchell J, Schrenzel MD, Reavill DR, Imai DM, Urban A, Kirkendall M, Woods LW, Chinchar VG, Pessier AP. 2014. Isolation of a Bohle iridovirus-like agent from boreal toads housed within a cosmopolitan aquarium collection. Diseases of Aquatic Organisms 111: 139-152.
    5. Pessier  AP and JR Mendelson (eds.). 2010. A Manual for Control of Infectious Diseases in Amphibian Survival Assurance Colonies and Reintroduction Programs.  IUCN/SSC Conservation Breeding Specialist Group: Apple Valley, MN
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