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- Respiratory

Snohomish County, WA

Outbreak Identifier: 5124

Alert ID: 2485

March 11, 2022

Confirmed Case(s) - Official Quarantine

Source: Washington State Veterinary Office

Number Confirmed: 1;
Number Exposed: 6;
Facility Type: Private Facility;
Restrictions: Placed quarantine of farm for 2 weeks after last fever or signs resolve.;
Notes: A horse at a private facility in Snohomish County has tested positive for EHV-1. The horse returned from Thermal, CA show after cancellation and had fever after arrival. Temperature check twice on others has been normal so far. For more information about EHV-1 go to: EHV-1 Factsheet.

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