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

Snohomish County, WA

Outbreak Identifier: 5587

Alert ID: 2991

April 28, 2023

Confirmed Case(s) - Official Quarantine

Source: Washington State Department of Agriculture

Number Confirmed: 1;
Number Exposed: 30;
Facility Type: Stable;
Age: 20; Gender: Mare; Onset of Clinical Signs: 4/19/2023;
Clinical Signs: Urinary incontinence, fecal incontinence, lack of anal/tail tone, Grade 3 ataxia, Mild facial nerve paresis (unilateral); Horse Status: Recovering; Vaccination Status: Vaccinated;
Comments: When the horse presented with neurologic signs, it was immediately placed in a quarantine barn where it remains under veterinary care. The stable and infected horse have both been placed under official quarantine. The State Veterinarian has visited the site and excellent biosecurity measures have been implemented. No other horses have exhibited clinical signs to date. For more information go to: https://www.equinediseasecc.org/equine-herpesvirus;

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