- Case counts (2016-2025), population estimates (2016-2023), & population projections (2024-2025): Public Health Ontario.
- Query: Case counts of reportable diseases by public health unit and year. Toronto, ON: Ontario Agency for Health Protection and Promotion; extracted on March 9, 2026.
Listeriosis
Listeria
Listeriosis is an intestinal infection caused by the bacterium Listeria monocytogenes. The Listeria bacteria are spread by eating contaminated foods such as ready-to-eat meats, soft cheeses, milk, and raw vegetables. The elderly, pregnant women, and those with weakened immune systems are most at risk of complications. These individuals should avoid high risk foods.
Local Information
2025 Statistics
Incidence rate is the number of new cases of disease divided by the number of persons at risk for the disease during a particular time period.
Cases:
0*
Incidence rate per 100,000 in 2025: 0
*Indicates confirmed cases in 2025.
Incidence rate per 100,000 of listeriosis by year
More information about listeriosis
Public Health Agency of Canada
Report to the Health Unit within one business day by fax (705-482-0670) or phone at 705-474-1400 or toll free at 1-800-563-2808, ext. 5229 if listeriosis is suspected or confirmed as per Ontario Regulation 135/18 and amendments under the Health Protection and Promotion Act, R.S.O., c.H.7.
Should one go to childcare, school, or work if they have listeriosis?
No exclusion necessary unless too ill to participate in regular activities. Listeriosis is rarely spread person-to-person.
Healthcare provider information
Public Health Ontario
Public Health Ontario
Ministry of Health - Ontario Public Health Standards
Contact our Communicable Disease Control (CDC) program at 705-474-1400 or toll free at 1-800-563-2808, ext. 5229, or by email to cdc@healthunit.ca for more information.
Last updated: Apr 2026, by CDC