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

District of Muskoka, ON

Outbreak Identifier: 5919

Alert ID: 3360

September 26, 2023

Confirmed Case(s) - No Quarantine

Source: OMAFRA

Number Confirmed: 1;
Number Exposed: Unknown;
Facility Type: Private Facility;
Age: 20; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 9/14/2023;
Clinical Signs: This was an unvaccinated 20 yo QH broodmare, nursing a 2 month old colt, that developed acute neurologic signs (blind, backing up) on September 14, and became recumbent and was euthanized on September 15th.; Confirmation Date: 9/25/2023; Horse Status: Euthanized; Vaccination Status: Unvaccinated;
Comments: This is the 12th confirmed equine EEE case of the year.;

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