Western College of Veterinary Medicine

Research Area(s)

  • Effects of toxins on animal and human health, liver regeneration

Academic Credentials

  • BVetSc, Jordan University of Science and Technology
  • MSc, Veterinary Pathology, University of Saskatchewan
  • PhD, Toxicology, University of Saskatchewan
  • Diplomate, American College of Veterinary Pathologists (Anatomic Pathology)

Research Interests

Dr. Al-Dissi’s research focuses on studying the effects of toxins on animal and human health. He is currently investigating the effects of ergot alkaloids on the vasculature and the mechanisms of these effects. His research team utilizes an arterial tissue bath system to study these effects in sheep after in vivo exposure.  

Another area of interest for Dr. Al-Dissi is liver regeneration. His research team is investigating the expression of metallothionein in the diseased liver of dogs, cats and horses and its relation to liver regeneration, inflammation, fibrosis and bile duct proliferation.


  • Cherewyk, J.E., Parker, S.E., Blakley, B.R., Al-Dissi, A.N.  2020.  Assessment of the vasoactive effects of the (S)-epimers of ergot alkaloids in vitro.  Journal of Animal Science, 98(7): skaa203.  https://www.doi.org/10.1093/jas/skaa203

  • Perdrizet, U., Blakley, B., Dissi, A.A.  2020.  Concentrations and deficiencies of minerals in cattle submitted i to a diagnostic laboratory in Saskatchewan from 2003-2012: A retrospective study.  Canadian Veterinary Journal, 61(1): 57-62.

  • Redford, T., Al-Dissi, A.N.  2019.  Feline infectious peritonitis in a cat presented because of papular skin lesions.  Canadian Veterinary Journal, 60(2): 183-185.

  • Verhoef, J.N.C., Allen, A.L., Harding, J.C.S., Al-Dissi, A.N.  2018.  Metallothionein expression in horses with chronic liver disease and its correlation with Ki-67 immunoreactivity.  Veterinary Pathology, 55(5): 703-710.  https://www.doi.org/10.1177/0300985818777802

  • Lemetayer, J., Al-Dissi, A., Tryon, K., Macdonald-Dickinson, V.  2017.  Primary intranasal melanoma with brain invasion in a dog.  Canadian Veterinary Journal, 58(4): 391-396.

  • McKenzie, C.M., Al-Dissi, A.N.  2017.  Accidental selenium toxicosis in lambs.  Canadian Veterinary Journal, 58(10): 1110-1112.

  • Novakovic, P., Harding, J.C.S., Al-Dissi, A.N., Detmer, S.E.  2017.  Type 2 porcine reproductive and respiratory syndrome virus infection increases apoptosis at the maternal-fetal interface in late gestation pregnant gilts.  PLoS ONE, 12(3): e0173360.  https://www.doi.org/10.1371/journal.pone.0173360

  • Vrolyk, V., Wobeser, B.K., Al-Dissi, A.N., Carr, A., Singh, B.  2017.  Lung inflammation associated with clinical acute necrotizing pancreatitis in dogs.  Veterinary Pathology, 54(1): 129-140.  https://www.doi.org/10.1177/0300985816646432

  • Weekes, D.M., Cawthray, J.F., Rieder, M., Syeda, J., Ali, M., Wasan, E., Kostelnik, T.I., Patrick, B.O., Panahifar, A., Al-Dissi, A., Cooper, D., Wasan, K.M., Orvig, C.  2017.  La(III) biodistribution profiles from intravenous and oral dosing of two lanthanum complexes, La(dpp)3 and La(XT), and evaluation as treatments for bone resorption disorders.  Metallomics, 9(7): 902-909.  https://www.doi.org/10.1039/c7mt00133a

  • Novakovic, P., Harding, J.C.S., Al-Dissi, A.N., Ladinig, A., Detmer, S.E.  2016.  Pathologic evaluation of type 2 porcine reproductive and respiratory syndrome virus infection at the maternal-fetal interface of late gestation pregnant gilts.  PLoS ONE, 11(3): e0151198.  https://www.doi.org/10.1371/journal.pone.0151198

  • Novakovic, P., Harding, J.C.S., Ladinig, A., Al-Dissi, A.N., MacPhee, D.J., Detmer, S.E.  2016.  Relationships of CD163 and CD169 positive cell numbers in the endometrium and fetal placenta with type 2 PRRSV RNA concentration in fetal thymus.  Veterinary Research, 47(1): 76.  https://www.doi.org/10.1186/s13567-016-0364-7

  • Ahmad N. Al-Dissi. 2015.  Toxicology for the equine practitioner. Veterinary Clinics of North America: Equine Practice, 31(2): 269-279. https://www.doi.org/10.1016/j.cveq.2015.04.009

  • Sridharan, S., Allen, A.L., Kidney, B., Al-Dissi, A.N.  2015.  Metallothionein expression in dogs with chronic hepatitis and its correlation with hepatic fibrosis, inflammation, and Ki-67 expression. Veterinary Pathology, 52(6): 1127-1133.  https://www.doi.org/10.1177/0300985815588607

  • Moussa, A.T., Singh, B., Al-Dissi, A.N.  2015.  Immunohistochemical expression of nuclear factor erythroid-2-related factor 2 and heme oxygenase 1 in normal bovine lung and bovine lung infected with Mannheimia haemolyticaCanadian Journal of Veterinary Research, 79(2): 81-86.

  • Benazzi, C., Al-Dissi, A.N., Chau, C.H., Figg, W.D., Sarli, G., de Oliveira, J.T., Gärtner, F.  2104.  Angiogenesis in spontaneous tumors and implications for comparative tumor biology.  The Scientific World Journal, 919570.  https://doi.org/10.1155/2014/919570

  • Arcand, S., Sharma, K., Al-Dissi, A.N., Cadetel, V.J.J., Sawicki, G., Weber, L.P.  2013.  Resveratrol protects against functional impairment and cardiac structural protein degradation induced by second hand smoke exposure. Canadian Journal of Cardiology, 29(10): 1320-1328.  https://www.doi.org/10.1016/j.cjca.2013.04.030