Meet our Team!

CO-FOUNDER / PRESIDENT

Dr Ohayon completed his Pediatric residency at McMaster in 1996 and his Allergy and Clinical Immunology residency in 1998. He served as a Consultant Pediatrician at McMasterChildren Hospital until 2003 and now consults in Allergy/Immunology in private practice. He instructs in the Michael DeGroote School of Medicine at McMaster University, training undergraduate and graduate medical students in Allergy/Immunology. Dr. Ohayon is co-founder of "iCASE", responsible for the planning of CME and review of Standard of Care for Allergists/ Immunologists in the SW Ontario area. He is co-editor of the new review journal in Allergy, "CAIT" Canadian Allergy and Immunology Today and a Peer Assessor for the College of Physicians and Surgeons of Ontario. He is the Medical Director of Hamilton Allergy, serving as Principal Investigator for Phase 1-4 clinical trials in the treatment and prevention of allergic diseases. He is a member of Canadian, American and European Allergy Societies

CO-FOUNDER / TREASURER

Dr. Pratt is a fellow of The Royal College of Physicians and Surgeons of Canada. She completed both her Internal Medicine Residency and 2 years of fellowship in Allergy and Clinical Immunology at McMaster University.

Dr. Pratt is an Assistant Clinical Professor at McMaster where she is involved with research and enjoys teaching residents and medical students.  She is one of the co-founders of iCASE.

CO-FOUNDER / MEMBER AT LARGE

Dr. Collin R Terpstra is a practising physician with a community practice based out of Cambridge; Department of Paediatrics at Grand River Hospital, and Associate Professor with McMaster University.

His training was mainly through the University of Western Ontario including a Bachelor of Education. He holds specialties in internal medicine and Allergy and Clinical Immunology from McMaster serving as Chief Resident. He was the recipient of JB Walker Award in academic standing and patient centred care; CFFM Specialist Preceptor of the Year. He is a proud member of the American and Canadian Allergy and Immunology Societies (CSACI, ACAAI, AAAAI).

Clinically his interests and publications lie in food allergies and treating high risk allergies with oral immunotherapy; chronic urticaria; drug allergies, and did run the regional high risk COVID vaccine clinic. He has a dedicated monoclonal antibody clinic. It is an exciting time to be an Allergist and Immunologist, the approach and treatments are moving quickly.