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

Okanogan County, WA

Outbreak Identifier: 5435

Alert ID: 2822

December 01, 2022

Confirmed Case(s) - Voluntary Quarantine

Source: State vet office.

Number Confirmed: 1;
Number Exposed: 2;
Facility Type: Private Facility;
Age: 12; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Rodeo; Onset of Clinical Signs: 11/20/2022;
Clinical Signs: Hanging head/depression. Thought to be colicky. Went down and owner euthanized.; Confirmation Date: 12/1/2022; Horse Status: Euthanized; Vaccination Status: Unvaccinated;
Comments: A horse at a private facility in Okanogan County has tested positive for EHM. Other two(2) horses at owners home are quarantined and separate from other equids. College rodeo student in Walla Walla was headed home to Okanogan County for holiday when horse got sick. Horses were previously at an outdoor boarding facility and they have not seen any sickness, but are monitoring.;

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