Communicable Disease Control

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Epidemiology & Surveillance

Surveillance is an essential part of communicable disease control and prevention, which includes the following components:

  • Monitoring disease trends;
  • Monitoring the progress of disease control objectives;
  • Estimating the size of a health problem;
  • Detecting outbreaks of infectious disease;
  • Evaluating interventions and preventive programs; and
  • Identifying research needs.


Toronto Public Health's Communicable Disease Surveillance Unit (CDSU) is responsible for monitoring communicable diseases in Toronto. The CDSU maintains the mandatory reportable disease system and is responsible for collecting, analyzing, interpreting and summarizing communicable disease data, to facilitate timely public health action.


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If you think you have food poisoning, we want to know about it! GastroBusters is a secure and confidential way to report the details of your food poisoning illness to Toronto Public Health.

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Annual, monthly, and weekly surveillance reports.