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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West Nile Virus

Regional Municipality of Niagara, ON

Outbreak Identifier: 5783

Alert ID: 3219

August 23, 2023

Confirmed Case(s) - No Quarantine

Source: OMAFRA

Number Confirmed: 1;
Number Exposed: Unknown;
Age: 2; Gender: Filly; Breed: Standardbred; Onset of Clinical Signs: 8/20/2023;
Clinical Signs: This filly was referred to an equine hospital with acute neurologic signs (grade IV ataxia, vestibular signs, whole body muscle fasciculations, strabismus in the right eye, hyperesthesia) which progressed to focal seizures, hypersalivation and recumbency. She was euthanized. Brain tissue was positive for WNV PCR. There was no history of travel.; Confirmation Date: 8/23/2023; Horse Status: Euthanized; Vaccination Status: Unvaccinated;

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