Infectious diseases are caused by pathogenic microorganisms, such as bacteria, viruses, parasites or fungi. These diseases can be acquired from another person, through fluid exchange or exposure to vectors, or from the environment. Public Health Ontario provides public health and health care partners with information, tools, and resources for the prevention and control of infectious diseases including:
- infectious disease surveillance, epidemiology, and data analysis and reporting
- case, contact and outbreak investigation and management
- prevention, control advice and support
- education and training
- laboratory testing
Areas of expertise include immunization and vaccine-preventable diseases; enteric, zoonotic and vector-borne diseases; and a wide range of infection prevention and control programs for health care and long-term care settings.
This report summarizes the 2016 data on the vectors that transmit West Nile Virus (WNV), eastern equine encephalitis virus (EEEV) and Lyme disease in Ontario.
Open the report
Management of patients with suspected rabies exposure
This guidance document provides information to support health care providers to work with local public health units to appropriately manage persons with suspected rabies exposures.
Echinococcus multilocularis (tapeworm)
These documents highlight key information about echinococcus
Infectious Disease Topics
Click on an infectious disease below for information, resources, research, laboratory testing information and related links.
Infectious Disease Snapshots
Provides access to statistics and information related to reportable infectious disease for Ontario and its 36 public health units.
Go to the Snapshots web page
This set of routine and annual reports provide data and trends related to different infectious diseases, antimicrobial resistance and immunization.
View all Surveillance Reports