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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Equine Herpesvirus- Neurologic

Wellington County, ON

Outbreak Identifier: 6805

Alert ID: 4307

April 14, 2025

Confirmed Case(s) - Voluntary Quarantine

Source: OMAFA

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

Horse 1:
Age: 24; Gender: Gelding; Breed: Thoroughbred (TB); Clinical Signs: This gelding became acutely ataxic on the evening of April 10 and was euthanized. He was positive for EHV-1 on PCR.; Horse Status: Euthanized; Vaccination Status: Vaccinated;

Comments: The facility owner has instituted voluntary animal movement restrictions and biosecurity procedures. To see past and present EHV-1 neurologic (EHM) cases in Ontario go to: https://www.oahn.ca/resources/ontario-equine-disease-alerts/ and enter the disease surveillance portal.;

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