College of Veterinary Medicine


Oscar Illanes, DVM, PhD, DACVP

Professor, Head of Department of Biomedical Veterinary Sciences, Director of Pathology Services.


Dr. Illanes holds a DVM degree (MV) from the Universidad Austral de Chile, a PhD degree in the area of neuroanatomy and neuropathology from the University of Liverpool, England, and completed a veterinary pathology residency program (specialty training) at Texas A&M University. Dr. Illanes is board certified by the American College of Veterinary Pathologists (ACVP) and has considerable teaching and diagnostic experience. His academic background includes 4 years as Assistant Professor of Veterinary Anatomy and Pathology at his Alma matter, and 23 years as a faculty pathologist in accredit Veterinary Colleges in Canada (Atlantic Veterinary College, University of Prince Edward Island; University of Calgary Faculty of Veterinary Medicine), and in the States (College of Veterinary Medicine, Western University of Health Sciences; Ross University School of Veterinary Medicine). In addition to his teaching, scholarly and diagnostic duties Dr. Illanes has been actively involved in specialty training (pathology interns/ residents/ graduate students) at its former institutions. His professional experience also includes 4 years as a toxicologic pathologist in the pharmaceutical industry (Department of Drug Safety Evaluation, Pfizer Global Research and Development, Pfizer Inc., La Jolla, California) where he participated in the pre-clinical evaluation of chemical compounds for the Oncology and Type II diabetes therapeutic areas. In 2007 Dr. Illanes returned to Canada and served as a tenured professor of pathology and chief of diagnostic services at the Faculty of Veterinary Medicine, University of Calgary (UCVM). In 2011 he took a position as professor of anatomic pathology at Ross University School of Veterinary Medicine where he remained until joining Long Island University in January 2019.

Dr. Illanes’ academic interests include collaborative research in natural and experimental disease, diagnostic pathology, neuropathology, medical education technology, internship/residency training and mentorship programs. 

Publications - (selected manuscripts)

  • Illanes, O.; Mossman, S.; McCarthy, K. (1990). Alpha herpesvirus saimiri infection in rabbits: 1. Light and electronmicroscopic study of cutaneous spinal nerves. Acta Neuropathol., 79:551-557.
  • Illanes, O.; Mossman, S.; McCarthy, K. (1990).  Alpha herpesvirus saimiriinfection in rabbits: 2. Morphometric study of cutaneous spinal nerves. Acta Neuropathol., 79:558-565.
  • Stoica, G.; Floyd, G.; Illanes, O.; Wong, P. (1992).  Temporal lymphoreticular changes caused by ts1, a paralytogenic mutant of Moloney Murine Leukemia Virus TB.   Lab. Invest., 66(4): 427-436. 
  • Illanes, O.; Tiffani-Castiglioni, E.; Edwards, J.F.; Shadduck, J.A. (1993). Spontaneous encephalitozoonosis in an experimental group of guinea pigs. J. Vet. Diagn. Invest., 5:  649-651.
  • Stoica, G.; Illanes, O.; Tasca, S.; Wong, P. (1993). Temporal  central and peripheral nervous system changes induced by a paralytogenic mutant of Moloney Murine Leukemia Virus TB. Lab. Invest., 69(6): 724-735.
  • Illanes, O; Anderson, S; Niesman, M; Zwick, L; Jessen, B. (2006). Retinal and peripheral nerve toxicity induced by the administration of a pan-cyclin dependent kinase (cdk) inhibitor in miceToxicologic Pathology, 34: 243-248.
  • Yang, A; Illanes, O; Trajkovic, D;Ramiro-Ibanez, F. (2007). Clinical, histopathological and immuno-histochemical analysis of para-aminophenol nephrotoxicity in Sprague Dawley Rats. Toxicologic Pathology, 35: 521-532.
  • Hirakawa, B; Jessen, B; Illanes, O; Peyster, A; McDermott T; Stevens (2008). Toxicogenomic Analysis of Cardiotoxicity in Rats. Genomics Insights,1: 3-12.  
  • Hecker, K; Donnon, T; Fuentealba, C; Hall, C; Illanes, O; Morck, D; Muelling, C (2009). Assessment of Candidates to the Veterinary Curriculum using a Multiple Mini Interview Method. Journal of Veterinary Medical Education, 36: 166-173.
  • Rose, N; Warren, AL; Whiteside, D; Bidulka J; Robinson JH; Illanes, O; Brookfield, C (2012). Columbid herpesvirus-1 mortality in great horned owls (Bubo virginianus) from Calgary, Alberta. Can. Vet. J.53:257-264.
  • Soto, E; Illanes, O; Hilchie, D; Morales, JA; Sunyakumthorn, P; Hawke, JP; Goodwin, A; Riggs, A; Yanong, R;  Pouder, DB; Floyd, RF; Arauz, M; Bogdanovic, L; Castillo F (2012). Molecular and immunohistochemical diagnosis of Francisella noatunensis subsp. orientalis from formalin-fixed paraffin embedded tissues. J. Vet. Diagn. Invest:24(5) 840-845.
  • Tremblay A; Dumitriu, S; Stather DR; MacEachern P; Illanes, O; Kelly MM (2012): “Use of a Drug Eluting Pleural Catheter for Pleurodesis”. Experimental Lung Research,38 (9-10): 475-82. 
  • Soto, E; Illanes, O; Revan, F; Griffin M, Riofrio A (2013): “Bacterial distribution and tissue targets following experimental Edwardsiella ictaluri infection in Nile tilapia (Oreochromis niloticus)”. Dis. Aquat. Org., Vol 104: 105-112.  
  • Soto, E; Griffin, M; Verma. A; Castillo-Alcala, F; Beierschmitt, A; Beeler-Marfisi, J; Arauz, M; Illanes, O(2013): “An outbreak of Yersinia enterocolitica in a captive colony of African Green Monkeys (Chlorocebus aethiops sabaeus) in the Caribbean”. Comparative Medicine,63 (5): 1-6.
  • Rienske A, Mortier R; Barkema HW; Bystrom JM; Illanes O; Orsel K; Wolf R; Atkins G, De Buck J (2013): Evaluation of age-dependent susceptibility in calves infected with two doses ofMycobacterium avium subspecies paratuberculosis using pathology and tissue culture”. Veterinary Research, 44:94.
  • Soto E; Arauz M; Gallagher CA; Illanes O(2014): “Nocardia cyriacigeorgica as the causative agent of mandibular osteomyelitis (lumpy jaw) in a cat”, J. Vet. Diagn. Invest, 26(4): 580-584.
  • Verma A; Soto E; Illanes O; Ghosh S; Fuentealba C (2015): “ Detection and genotyping of Leptospira spp. from the kidney of a seemingly healthy pig slaughtered for human consumptionThe Journal of Infection in Developing Countries,05/2015: 9 (5). DOI-10.3855/jidc.5727.
  • Rienske M, Barkema H, Orsel K, Muench G, Bystrom J, Illanes O,De Buck J (2015): Longitudinal evaluation of diagnostics in experimentally infected young calves during subclinical and clinicalparatuberculosis”Canadian Veterinary Journal, Dec, 56(12): 1266-70.
  • Soto E, A Loftis, D Boruta, S Rostad, A Beierschmitt, M McCoy, S Francis, J Berezowski, O Illanes, D Recinos, M Arauz, D Spencer, T Fraites, R Palmour (2015): “Epidemiologic multi-species surveillance study in a captive African Green monkey farm following an outbreak of yersiniosis”. Comparative Medicine, Dec, Vol 65 (6): 1-6.
  • Kӧster L, Shell L, Illanes O, Lathroum C, Neuville K, Ketzis J (2016): “Percutaneous ultrasound-guided cholecystocentesis and bile analysis for the detection of Platynosomum SPP. Induced cholangitis in cats”. Journal of Veterinary Internal Medicine, 30:787-793.
  • Soto E, Zayas M, Tobar J, Illanes O, Yount S, Francis S, MM Dennis (2016): “Laboratory-controlled Challenges of Nile Tilapia (Oerochromis niloticus) with Streptococcus agalactiae: Comparison between Immersion, Oral, Intracoelomic and Intramuscular Routes of Infection”. Journal of Comparative Pathology, Vol. 155, 339-345
  • Ortloff A, Neumann J, Illanes O(2017): “Concurrent gliosarcoma and choroid plexus carcinoma in a cow”.Journal of Comparative Pathology, Vol 156 (1): 25-28. 
  • Kӧster L, Shell L, Ketzis J, Rajeev S, Illanes O(2017): The diagnosis of pancreatic disease in feline platynosomosis”The Journal of Feline Medicine and Surgery, 1-7. 1:1098612X16685676. Epub 2017 Jan 1.
  • Morosco D, Illanes O, Fuentealba C (2017): Renal StephanuriasisGross and microscopic findings in naturally-infected pigs from St. Kitts, West Indies”. Austral Journal of Veterinary Sciences, Vol 49, 53-57. 
  • Ghosh S, Soto E, Illanes O, Navarro R, Soe Aung M, Singh Malik Y, Kobayashi N, Fuentealba C (2018): “High detection rates of Torque teno sus virus in co-infection with important viral pathogens in porcine kidneys on St. Kitts Island, Lesser Antilles”. Transboundary and Emerging Diseases, July 2018, DOI:10.1111/tbed.12960 
  • Souvik Ghosh S., Soto E., Illanes O., Navarro R., Aung MS. 2, Malik Y.S., Kobayashi N., Fuentealba C. Torque teno sus virus in concomitant infection with important viral pathogens in porcine kidneys on St. Kitts Island: First report from the Lesser Antilles. Transboundary and Emerging Diseases. 2018.
  • Dorrestein E, Peda A, Thrall MA, Illanes O (2019): “Fatal pulmonary thromboembolism in a 2-year-old dog receiving long-term corticosteroid therapy”, Vet Rec Case Rep [Published Online First on 29 May 2019].