Joanne Hewson

Joanne Hewson head shot

Associate Dean, Students & Academic | Associate Professor

DVM, PhD, DACVIM (Large Animal)
 519-824-4120 Ext. 54423


Research Interests

  • Bovine and equine respiratory disorders
  • Equine neonatology
  • Camelid medicine
  • Communication skills in veterinary medicine
  • Clinical teaching of veterinary medicine and performance assessment

Current Graduate Students

  • Dustin Dennis - DVSc

Selected Publications

  • Hewson J, Johnson R, Arroyo LG, Diaz-Mendez A, Ruiz-López JA, Gu Y, del Castillo JRE.  Comparison of continuous infusion with intermittent bolus administration of cefotaxime on blood and cavity fluid drug concentrations in neonatal foals.  J Vet Pharmacol Ther. 2012 Apr 11. doi: 10.1111/j.1365-2885.2012.01394.x. [Epub ahead of print]
  • 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. 2012 Jan 15;145(1-2):479-84. Epub 2011 Oct 29.
  • Hewson J, Viel L, Caswell JL, Shewen PE, Buchanan-Smith JG.  Impact of isoflupredone acetate treatment on clinical signs and weight gain in weanling heifers with experimentally induced Mannheimia haemolytica bronchopneumonia.  Am J Vet Res. 2011 Dec;72(12):1613-21.
  • Beeler-Marfisi J, Gallastegui Menoyo A, Beck A, Koenig J, Hewson J, Bienzle D. Gelatinous marrow transformation and hematopoietic atrophy in a miniature Horse stallion.  Vet Pathol 2011;48(2):451-455.
  • Diaz-Mendez A, Carman S, Chambers T, Tiwari A, Hewson J, Dewey C, Viel L.  Surveillance of equine influenza virus in Ontario horses.  Can J Vet Res 2010; 74(4):271-278. 
  • Fjordbakk CT, Arroyo LG, Hewson J.  Retrospective study of the clinical features of limb cellulitis in 63 horses.  Vet Rec 2008; 162(8):233-236.
  • Rho GJ, Coppola G, Sosnowski J, Kasimanickam R, Johnson W, Semple E, Mastromonaco G, Betts D, Koch TG, Weese JS, Hewson J, Hayes MA, Kenney DG, Basrur PK, King WA.  Use of somatic cell nuclear transfer to study meiosis in female cattle carrying a sex-dependent fertility impairing X-chromosome abnormality.  Cloning Stem Cells 2007; 9: 118-129.
  • Hewson J, Cebra CK.  Peritonitis in a llama caused by Streptococcus equi subsp.zooepidemicus.  Can Vet J 2001; 42: 465-467.


Books Chapters Published

Hewson J, Arroyo LG.  Medical Conditions of the Lower Respiratory Tract. In: Munroe GA & Weese JS (Eds), Equine Clinical Medicine, Surgery and Reproduction. Manson Publishing, London, UK, 2011; 458-480. Viel L, Hewson J.  Bronchoalveolar lavage.  In: Robinson NE (Ed.), Current Therapy in Equine Medicine 5.  Saunders, St. Louis, MO, 2003; 407-411. Hewson J, Viel L. Sampling, Microbiology and Cytology of the Respiratory Tract.  In: Lekeux P. (Ed.), Equine Respiratory Diseases. Ithaca: International Veterinary Information Service (, 2002; document no. B0308.0602. Hewson J.  Ascarids, Cyathostomiasis.  In: Brown CM, Bertone JJ (Eds.), The 5-Minute Veterinary Consult: Equine.  Lippincott Williams & Wilkins, Baltimore, MD, 2002; 140-141, 306-307.