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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.



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San Bernardino County, CA
Outbreak Identifier: 6724
Alert ID: 4218
February 11, 2025
Outbreak Update

Number Confirmed: 2; 
Number Exposed: 90; 
Number Euthanized: 1; 
Comments: A 7-year-old gelding with fever and mild neurological clinical signs was confirmed positive for Equine Herpesvirus Myeloencephalopathy (EHM) secondary to Equine Herpesvirus-1 (EHV-1). The gelding is alive and under supportive care at the home premises. CDFA continues to actively monitor the situation.; 
Previous Alerts: 4208