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Photo: Sharon Spier

Sharon Spier- BS, DVM, PhD
Medicine & Epidemiology

3117 Tupper Hall
Davis, CA 95616

+1 530 752 0292


Research Focus

Corynebacterium pseudotuberculosis infections in horses; Hyperkalemic periodic paralysis in horses; Genetic diseases of horses

Specialty Focus

Equine Medicine


1981 BS , Texas A&M University, College Station,
1983 DVM Doctor of Veterinary Medicine, Texas A&M University, College Station,
1989 PhD Comparative Pathology, University of California, Davis,

Honors and Awards

1994 AVMA Council for Research: Excellence in Equine Research Award
Jacob Traum Award for Graduate Work in Infectious Disease
Western States Food Animal Disease Research Conference
Best Graduate Student Presentation
Gamma Sigma Delta Honor Society of Agriculture
Phi Zeta Honor Society
Phi Kappa Phi Honor Society
The National Dean's List
Distinguished Student Award


Diplomate American College of Veterinary Internal Medicine
State Licensure - California
USDA Accredited Veterinarian

Active Research Grants

Principal Investigator, Immunization against Corynebacterium pseudotuberculosis infections in horses, (Principal Investigator), Boerhinger-Ingelheim

Most Recent 10 Publications

  • Link Icon 2012 Nogradi N, Spier SJ, Toth B, Vaughan B Musculoskeletal Corynebacterium pseudotuberculosis infection in horses: 35 cases (1999-2009) J Am Vet Med Assoc,
  • Link Icon 2011 Kilcoyne I, Dechant JE, Kass PH, Spier SJ Penetrating injuries to the frog (cuneus ungulae) and collateral sulci of the foot in equids: 63 cases (1998–2008) JAVMA,
  • Link Icon 2011 Rand CL, Hall TL, Aleman MR, Spier SJ Otitis Media-Interna and Secondary Meningitis Associated with Corynebacterium pseudotuberculosis Infection in a Horse Equine Veterinary Education doi: 10.1111/j.2042-3292.2011.00273.x,
  • Link Icon 2011 Spier S, Toth B, Edman J, Quave A, Habasha F, Garrick M, Byrne B Survival of Corynebacterium pseudotuberculosis (equine biovar) in soil Veterinary Record doi: 10.1136/vr.100543,
  • Link Icon 2010 Malamed R, Berger J, Bain MJ, Kass P, Spier SJ Retrospective evaluation of crib-biting and windsucking behaviours and owner-perceived behavioural traits as risk factors for colic in horses Equine Veterinary Journal,
  • Link Icon 2010 Gorman JK, Gabriel M, MacLachlan NJ, Nieto NC, Foley JE, Spier SJ Pilot Immunization of mice infected with an equine strain of Corynebacterium pseudotuberculosis Veterinary Therapeutics,
  • Link Icon 2009 Pusterla N, Mapes S, Madigan JE, MacLachlan NJ, Ferraro GL, Watson JL, Spier SJ, Wilson WD Prevalence of EHV-1 in adult horses transported over long distances Veterinary Record,
  • Link Icon 2009 Hassel DM, Smith PA, Nieto JE, Beldomenico P, Spier SJ Di-tri-octahedral smectite for the prevention of post-operative diarrhea in equids with surgical disease of the large intestine: Results of a randomized clinical trial The Veterinary Journal,
  • Link Icon 2009 Nieto NC, Foley JE, MacLachlan NJ, Yuan T, Spier SJ Evaluation of hepatic disease in mice following intradermal inoculation with Corynebacterium pseudotuberculosis American Journal of Veterinary Research,
  • Link Icon 2009 Hassel DM, Spier SJ, Aldridge BM, Watnick M, Argenzio RA, Snyder JR Influence of diet and water supply on mineral content and pH within the large intestine of horses with enterolithiasis The Veterinary Journal,

Most Recent 5 Book Chapters

2011 Spier SJ: Hyperkalemic periodic paralysis, Ross MW, Dyson SJ, (ed), Diagnosis and Management of Lameness in the Horse, 2nd edition, St Louis, Missouri. 838-839.

2011 Spier SJ, Finno CJ, Valberg SJ: Inherited problems of foals, McKinnon AO, Squires EL, Vaala WE, Varner DD, (ed), Equine Reproduction, West Sussex, UK. 673-680.

2009 Spier SJ: Hyperkalemic periodic paralysis, Smith BP, (ed), Large Animal Internal Medicine, 3rd edition, St. Louis, Missouri. 1395-1398.

2009 Aleman M, Spier SJ: Corynebacterium pseudotuberculosis infection, Smith BP, (ed), Large Animal Internal Medicine, 4th edition, St. Louis, Missouri. 1184-1188.

2009 Spier SJ: Corynebacterium pseudotuberculosis infection in horses, Mair TS, Hutchinson RE, (ed), Infectious Diseases of the Horse, Cambridgeshire, UK. 247-252.