Dr. Johnston is a professor of medicine, infectious diseases, at Dalhousie University and the Nova Scotia Health Authority. She has extensive experience at the provincial and national level in infection prevention and control and infectious diseases residency training, having chaired the Public Health Agency of Canada’s (PHAC) Steering Committee on Infection Control Guidelines and as a founding member of the Canadian Hospital Epidemiology Committee that, with PHAC, operates the Canadian Nosocomial Infection Surveillance Program (CNISP). She has chaired the Specialty Committee in Infectious Diseases, Royal College of Physicians and Surgeons of Canada.
Dr. Johnston’s research interests include the epidemiology of hospital-acquired infections, projects having included the prevalence of hospital-acquired infections in CNISP hospitals and incidence of central venous catheter associated infections and prosthetic joint infections. With colleagues in the Division, she collaborates on studies of the immune response in people with hepatitis C and HIV infection.