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

Lemhi County, ID

Outbreak Identifier: 4865

Alert ID: 2223

September 08, 2021

Confirmed Case(s) - No Quarantine

Source: Idaho Department of Agriculture

Number Confirmed: 1;
Facility Type: Farm;
Age: 8; Gender: Mare; Breed: Not Reported; Onset of Clinical Signs: 8/27/2021
Clinical Signs: Ataxia, incoordination, Muscle Fasciculations, Masseter fasciculations; Confirmation Date: Not Reported; Horse Status: Recovering; Vaccination Status: Undervaccinated;
Notes: Horse had previously been vaccinated, but it has been at least several years since last vaccination. For more information go to: WNV factsheet

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