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Photo: Janet Foley

Janet Foley- BA, DVM, MS, PhD
Medicine & Epidemiology

1320 Tupper Hall
Davis, CA 95616

+1 530 754 9740


Research Focus

I study the ecology and epidemiology of vector-borne diseases, particularly tick-transmitted diseases in the western U.S. My most involved project seeks to understand the impact of forest change, typically harvesting (which changes vegetational succession), fire, and fragmentation, on persistence and emergence of Lyme disease and anaplasmosis in the west. Related to this major goal are a collection of projects that include assessing various species' health in these forests, including mange in bobcats, chipmunk evolution and ecology, a die-off of western gray squirrels in the San Bernardino mountains, woodrat landscape genetics and disease transmission, mites and other vector-borne disease in the endangered Amargosa vole and the potentially listed American pika, and others.

Specialty Focus



1985 BA , George Mason University, Faifax, VA,
1987 MS , George Mason University, Faifax, VA,
1993 DVM , University of California, Davis,
1997 PhD , University of California, Davis,

Honors and Awards

2005 Patent - Virulent Systemic Feline Calicivirus
1995-1997 Krade and Maddox Feline Medicine Fellowship
1993 UC Davis Feline Medicine Senior Award
1992 Nola Ehrenburg Memorial Feline Medicine Award
1992 California Veterinary Medical Association Auxiliary Award
1991 Moss Belknap Scholarship
1991 Contra Costa County Kennel Club Award
1988 Jastro-Shields research grant
1987-1988 NIH Traineeship
1986 Alpha Chi National Honor Society
1985 Sigma Xi grant-in-aid of research
1985 Mountain Lake Biological Station Service Award

Active Research Grants

Principal Investigator, Evolution of chronic infection in Anaplasma phagocytophilum, (Principal Investigator), NIH

Principal Investigator, Leptospirosis: A forgotten disease of dogs, (Principal Investigator), AKC Canine Health Foundation

Co-Investigator, Impacts of a fungal pathogen in the cascades frog in northern California, J Piovia-Scott (Principal Investigator), Fish and Wildlife Service

Most Recent 10 Publications

  • Link Icon 2011 Piovia-Scott J, Pope K, Lawler S, Cole E, Foley J Factors related to the distribution and prevalence of the fungal pathogen Batrachochytrium dendrobatidis in Rana cascadae and other amphibians in the Klamath Mountains Biological Conservation,
  • Link Icon 2011 Rejmanek D, Nieto NC, Barash N, Foley JE Temporal patterns of tick-borne granulocytic anaplasmosis in California Ticks Tick Borne Dis,
  • Link Icon 2011 Plowright RK, Foley P, Field HE, Dobson AP, Foley JE, Eby P, Daszak P Urban habituation, ecological connectivity and epidemic dampening: the emergence of Hendra virus from flying foxes (Pteropus spp.) Proc. R. Soc. B,
  • Link Icon 2011 Foley JE, Nieto NC The ecology of tick-transmitted infections in the redwood chipmunk (Tamias ochrogenys) Ticks and Tick-borne Diseases,
  • Link Icon 2011 Foley J, Rejmanek D, Fleer K, Nieto N Nidicolous ticks of small mammals in Anaplasma phagocytophilum-enzootic sites in northern California Ticks and Tick-borne Disease,
  • Link Icon 2011 Fleer KA, Foley P, Calder L, Foley JE Arthropod vectors and vector-borne bacterial pathogens in Yosemite National Park J Med Entomol,
  • Link Icon 2011 Chu CY, Jiang BG, He J, Gao Y, Zhang PH, Wu XM, Zhang WY, Shi H, Gaowa HS, Wang JB, Foley JE, Liu W, Cao WC Genetic diversity of Borrelia burgdorferi sensu lato isolates from Northeastern China Vector Borne Zoonotic Dis,
  • Link Icon 2011 Carrade D, Foley JE, Sullivan M, Foley CW, Sykes JE Spatial distribution of seroprevalence for Anaplasma phagocytophilum, Borrelia burgdorferi, Ehrlichia canis, and Dirofilaria immitis in dogs in Washington, Oregon, and California Vet Clin Pathol,
  • Link Icon 2010 Sykes JE, Marks SL, Mapes S, Schultz RM, Pollard RE, Tokarz D, Pesavento PP, Lindsay LA, Foley JE Salmon poisoning disease in dogs: 29 cases Journal of Veterinary Internal Medicine,
  • Link Icon 2010 Nieto NC, Madigan JE, Foley JE The dusky-footed woodrat (Neotoma fuscipes) is susceptible to infection by Anaplasma phagocytophilum originating from woodrats, horses, and dogs J Wildl Dis,

Most Recent 5 Book Chapters

2009 Foley JE: Vector-borne diseases in shelters, Miller L, Hurley KF, (ed), Shelter Medicine, Ames, Iowa. 331-340.

2006 Foley JE, Case B: Zoonotic and vector borne infections in high-density cat populations, August, J, (ed), Consultations in Feline Internal Medicine, St. Louis, MO. 709-716.

2006 Foley JE: Calicivirus: spectrum of disease, August, J, (ed), Consultations in Feline Internal Medicine, St. Louis, MO. 1-10.

2006 Foley JE: Prevention and management of infectious diseases in multiple-cat environments, CE Greene, (ed), Infectious Diseases of the Dog and Cat, Philadelphia. .

2004 Foley JE: Feline infectious peritonitis and feline enteric coronavirus, S. Ettinger and E. Feldman, (ed), Textbook of Veterinary Internal Medicine: Diseases of the Dog and Cat, Philadelphia. .