Outbreaks | Equine Disease Communication Center

Updates on current disease outbreaks are listed here as they occur and will include the date listed, disease name, location and current status. Specific premises will not be named but the general location by town, county and state will be listed. When locations, events or horses are at risk they will be listed. Updates will be posted as they are received.

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Strangles

Regional Municipality of Waterloo, ON

Outbreak Identifier: 7263

Alert ID: 4796

December 15, 2025

Confirmed Case(s) - Voluntary Quarantine

Source: OMAFA

Number Confirmed: 2;
Number Suspected: Unknown;
Number Exposed: Unknown;
Facility Type: Farm;

Horse 1:
Breed: Standardbred; Clinical Signs: Two standardbred horses, located on a private farm, had nasal discharge and lymph node swelling and tested positive for S. equi . The farm had been dealing with a respiratory infection prior to testing. These horses are NOT part of the racing industry.;

Comments: The farm owner, working with their veterinarian, has instituted voluntary animal movement restrictions and biosecurity protocols. To see past and present Strangles cases in Ontario go to: https://www.oahn.ca/resources/ontario-equine-disease-alerts/ and enter the disease surveillance portal.;;

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