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 Halton, ON

Outbreak Identifier: 6868

Alert ID: 4373

May 22, 2025

Confirmed Case(s) - Voluntary Quarantine

Source: OMAFA

Number Confirmed: 1;
Number Exposed: Unknown;
Facility Type: Boarding Facility;

Horse 1:
Age: 25; Gender: Mare; Clinical Signs: This mare developed a thick nasal discharge and cough after sharing a paddock with 4 new horses. She tested positive for S. equi by PCR of the nasal discharge.; Confirmation Date: 5/20/2025;

Comments: The facility 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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