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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Eastern Equine Encephalitis

Renfrew County, ON

Outbreak Identifier: 7034

Alert ID: 4555

September 03, 2025

Confirmed Case(s) - No Quarantine

Source: OMAFA

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

Horse 1:
Age: 8; Gender: Mare; Breed: Draft; Onset of Clinical Signs: 8/4/2025; Clinical Signs: This mare developed acute neurologic signs on Aug 4 and died that day.; Horse Status: Deceased; Vaccination Status: Undervaccinated;

Comments: This is the seventh confirmed equine EEE case in Ontario this year. To see past and present EEE cases in Ontario go to: https://www.oahn.ca/resources/ontario-equine-disease-alerts/ and enter the disease surveillance portal;;

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