Faculty Profile

Gary Haldorson

Gary Haldorson

Pathologist, Associate Professor


  • Veterinary Microbiology and Pathology
  • Washington Animal Disease Diagnostic Laboratory

Affiliated Organizations:

  • Diplomate American College of Veterinary Pathologists

Office Phone: 509-335-6332



After 8 years in private practice in Oregon, I returned to WSU to complete a residency in veterinary pathology and PhD training. When that training was completed, I was hired as a clinical instructor and then a full time faculty member. I teach in both the first year General Pathology course and the second year Systemic Pathology course. In addition, I am a faculty pathologist at the Washington Animal Disease Diagnostic Laboratory.

Education &Training:
  • BS Oregon State University 1986
  • DVM Oregon State University 1990
  • PhD Washington State University 2005
  • Diplomate American College of Veteri nary Pathologists 2007


  • VM 545 General Pathology
  • VM 546 Systemic Pathology
  • VM 656 Diagnostics Rotation
  • VPa 542 Advanced Diagnostic Pathology
  • VPa 592 Anatomic Pathology Seminar

My research consists of collaboration with other investigators in our department, in the College of Veterinary Medicine, in other Colleges at WSU, and from other Universities. This includes a variety of topics that have included investigations of beak overgrowth in Red Tailed hawks, Campylobacter and Salmonella sp. infection in chickens, Lyme's disease in a mouse model, canine oncology, and evaluation of surgical/therapeutic techniques in small animals, among others.

Select Publications
  • LeCuyer TE, Rink A, Bradway DS, Evermann JF, Nicola AV, Baszler T, Haldorson GJ (2015) Abortion in a Mediterranean miniature donkey (Equus asinus) associated with a gammaherpesvirus similar to Equid herpesvirus 7. J Vet Diagn Invest 749-53. doi: 10.1177/1040638715611444 PMID: 26462760 PMCID:
  • O'Loughlin JL, Samuelson DR, Braundmeier-Fleming AG, White BA, Haldorson GJ, Stone JB, Lessmann JJ, Eucker TP, Konkel ME (2015)

    The Intestinal Microbiota Influences Campylobacter jejuni Colonization and Extraintestinal Dissemination in Mice.

    Applied Environmental Microbiology PMID: 25934624 PMCID: PMC4551207
  • Nelson DD, Haldorson GJ, Stanton JB, Noh SM, Bradway DS, Mansfield KG, Baszler TV (2014) Francisella tularensis infection without lesions in gray tree squirrels (Sciurus griseus): a diagnostic challenge. J Vet Diagn Invest. 26(2):312-5. doi: 10.1177/1040638713520541 PMID: 24557750 PMCID:
  • Hove PR, Haldorson GJ, Magunda F, Bankhead T (2014) Presence of Arp specifically contributes to joint tissue edema associated with early-onset Lyme arthritis. Infect Immun. 82(1):43-51. doi: 10.1128/IAI.01061-13 PMID: 24101694 PMCID: PMC3911854
  • Byers S, Barrington G, Nelson D, Haldorson G, Holt T, Callan R. (2011) Neurological causes of diaphragmatic paralysis in 11 alpacas (Vicugna pacos). J Vet Intern Med. 25(2):380-5. doi: 10.1111/j.1939-1676.2010.0661.x. Epub 2011 Jan 31. PMID: 21281346 PMID: 21281346 PMCID:

Fall 1999         The Kevin and ‘Buns’ Sheehy Award for Creativity and Excellence in Teaching

Fall 1999               Teaching Assistant Excellence Award – GPSA, Washington State University

Fall 2003               C.L. Davis Foundation Student Scholarship Award for Veterinary Pathology

Winter 2007        Newbrey Teaching Scholar, WSU College of Veterinary Medicine

Winter 2009        Newbrey Teaching Scholar, WSU College of Veterinary Medicine

Winter 2010        Newbrey Teaching Scholar, WSU College of Veterinary Medicine

Winter 2014        Newbrey Teaching Scholar, WSU College of Veterinary Medicine

Winter 2016        Newbrey Teaching Scholar, WSU College of Veterinary Medicine

Winter 2017        Newbrey Teaching Scholar, WSU College of Veterinary Medicine