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Disease Alerts

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.


Equine Herpesvirus- Neurologic
Los Angeles County, CA
Outbreak Identifier: 5244
Alert ID: 2623
June 18, 2022
Confirmed Case(s) - Official Quarantine


Number Confirmed: 2;
Facility Type: Boarding Facility;
Age: 30; Gender: Gelding;
Clinical Signs: Transient fever; Confirmation Date: 6/17/2022; Horse Status: Affected And Alive; Vaccination Status: Vaccinated;
Notes: Additional information can be found here:;
Previous Alerts: 2620. For more information go to EHM factsheet.