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Dr. Jennie Johnstone

Mount Sinai Hospital
Joseph & Wolf Lebovic Health Complex
600 University Avenue
Toronto, Ontario
M5G 1X5

Tel.: 416-586-4800

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► ORC ID: 0000-0002-3785-6617



Dr. Jennie Johnstone


Dr. Jennie Johnstone joined Sinai Health in 2018 as Physician Lead of Infection Prevention and Control. She is also an Associate Professor in the Laboratory Medicine and Pathobiology and Dalla Lana School of Public Health, University of Toronto.

Dr. Johnstone obtained her medical degree from Dalhousie University.  She then moved to Edmonton, Alberta where she completed her Internal Medicine and Infectious Disease training at the University of Alberta.  Following her residency she completed a clinical research fellowship in Edmonton.

She moved to Hamilton in July 2008 where she practiced Infectious Diseases at McMaster University and completed her PhD in Health Research Methodology (Epidemiology).

Following her PhD, she joined Public Health Ontario as an Infection Prevention and Control physician where she continues to lead research focused on infection prevention and control in the areas of vancomycin-resistant enterococci, ventilator-associated pneumonia and Clostridium difficile.

Prior to joining Sinai Health, she worked at St. Joseph's Health Center in Toronto for 5 years, where she practiced Infectious Diseases and ran the Infection Prevention and Control program.

Dr. Johnstone has published more than 85 research articles in peer-reviewed journals and has participated widely in the development of clinical guidelines on topics such as COVID-19 and other Infection Prevention and Control topics on behalf of the National Advisory Committee on Infection Prevention and Control for Public Health Agency of Canada, Ontario Provincial Infectious Diseases Advisory Committee (PIDAC) and Ontario Health Toronto Region working groups.

At a Glance

Physician Lead of Infection Prevention and Control, Sinai Health, and clinician scientist, Lunenfeld-Tanenbaum Research Institute.

Research focus on infection prevention and control: vancomycin-resistant enterococci, ventilator-associated pneumonia and C. difficile.

Major Research Activities

Dr. Johnstone is involved in projects examining aspects of the COVID-19 epidemic, completing PROSPECT (a trial examining probiotics for prevention of ventilator-associated pneumonia) and studies investigating the optimal infection control practices for vancomycin-resistant enterococci.