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Photo: Joie Watson

Joie Watson- BS, DVM, PhD
Associate Professor
Medicine & Epidemiology

2108 Tupper Hall
Davis, CA 95616

+1 530 752 1363


Research Focus

Immunology and Infectious Disease in Horses

Specialty Focus

Equine Medicine


1994 PhD , University of California, Davis - Comparative Pathology Graduate Group, Davis, CA
1986 DVM , University of California, Davis - School of Veterinary Medicine, Davis, CA
1982 BS , William Smith College, Geneva, New York

Honors and Awards

2008 Favorite Professor (Equine), Conferred by the UC Davis, School of Veterinary Medicine, Class of 2009
2007 First Place, Equine Related Newsletter (print), American Horse Publications. For “Intestinal Parasites in Horses – what every owner should know.” The Horse Report, 25(4), October, 2007.
2006-Present Watson, JL and KL Jackson. US Patent Application No 10/857,673. IL-4 Receptor Patent: Atagonists for Horse, Dog and Cat. Submitted May 2003. Filed May 2004. Allowed 2006.
1994 Graduate Student Presentation Award
1990 Copper 7 Goldsmith Award


State of California Veterinary License
Diplomate American College of Veterinary Internal Medicine (Large Animal Internal Medicine)

Active Research Grants

Co-Principal Investigator, Modeling the equine immune response in vitro, Ferraro GL (Principal Investigator), Bernice Barbour Foundation, Inc

Most Recent 10 Publications

  • Link Icon 2013 Kilcoyne I, Watson JL, Kass PH, Spier SJ Incidence, management, and outcome of complications of castration in equids: 324 cases (1998-2008) J Am Vet Med Assoc,
  • Link Icon 2012 Heller MC, Watson JL, Blanchard MT, Jackson KA, Stott JL, Tsolis RM Characterization of Brucella abortus infection of bovine monocyte-derived dendritic cells Vet Immunol Immunopathol,
  • Link Icon 2012 Whitehead AE, Parreira VR, Hewson J, Watson JL, Prescott JF Development of a live, attenuated, potential vaccine strain of R. equi expressing vapA and the virR operon, and virulence assessment in the mouse Vet Immunol Immunopathol,
  • Link Icon 2011 Carrade DD, Affolter VK, Outerbridge CA, Watson JL, Galuppo LD, Buerchler S, Kumar V, Walker NJ, Borjesson DL Intradermal injections of equine allogeneic umbilical cord-derived mesenchymal stem cells are well tolerated and do not elicit immediate or delayed hypersensitivity reactions Cytotherapy,
  • Link Icon 2010 Heller MC, Drew CP, Jackson KA, Griffey S, Watson JL A potential role for indoleamine 2,3-dioxygenase (IDO) in Rhodococcus equi infection Vet Immunol Immunopathol,
  • Link Icon 2010 Drew CP, Heller MC, Mayo C, Watson JL, Maclachlan NJ Bluetongue virus infection activates bovine monocyte-derived macrophages and pulmonary artery endothelial cells Vet Immunol Immunopathol,
  • Link Icon 2010 Heller MC, Jackson KA, Watson JL Identification of immunologically relevant genes in mare and foal dendritic cells responding to infection by Rhodococcus equi Vet Immunol Immunopathol,
  • Link Icon 2010 Torres SM, Malone ED, White SD, Koch SN, Watson JL The efficacy of imiquimod 5% cream (Aldara(®) ) in the treatment of aural plaque in horses: a pilot open-label clinical trial Vet Dermatol,
  • Link Icon 2008 Pusterla N, Mapes S, Madigan JE, MacLachlan NJ, Ferraro GL, Watson JL, Spier SJ, and Wilson WD Prevalence of equine herpesvirus-1 infection in adult horses undergoing long distance transportation Vet Rec,
  • Link Icon 2007 Pusterla N, Watson JL, Madigan JE, Wilson WD Technique and diagnostic value of percutaneous lung biopsy in 66 horses with diffuse pulmonary diseases using an automated biopsy device Equine Vet Educ,

Most Recent 5 Book Chapters

2014 Watson JL: Chapter 37: Diseases of the hematopoietic and hemolymphatic systems, Watson JL, (consulting ed); Smith BP, (ed), Large Animal Internal Medicine, 5th Edition. 1044-83.

2008 Watson JL: Chapter 188: Assays for evaluation of transfer of passive immunity, Robinson NE, Sprayberry KA, (ed), Current Therapy in Equine Medicine, 6e, Philadelphia. 860-1.

2008 Watson JL: Pleuropneumonia, Lavoie JP, Hinchcliff K, (ed), Blackwell's Five-Minute Veterinary Consult: Equine, 2nd Edition. 603.

2008 Watson JL: Lungworm – Parasitic bronchitis and pneumonia, Lavoie JP, Hinchcliff K, (ed), Blackwell's Five-Minute Veterinary Consult: Equine, 2nd Edition. 464-65.

2002 Slovis NM, Watson JL: Injection site eosinophilic granulomas, Smith BP, (ed), Large Animal Internal Medicine, 3rd Edition , St Louis. 1230.