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

San Mateo County, CA

Alert ID: 1121

November 07, 2018

Source: California Department of Food and Agriculture

November 7, 2018: The California Department of Food and Agriculture confirmed Equine Herpesvirus Myeloencephalopathy (EHM) in a 24-year old Arabian mare. The mare, originating from a San Mateo County facility, was displaying neurologic signs and was vaccinated. The mare was removed from the property and placed in isolation and quarantined. CDFA is investigating to identify exposed horses which will be monitored for clinical signs and temperatures taken twice daily. Any horse displaying a fever or compatible clinical signs will be tested. CDFA will continue to monitor the situation and post new information as it becomes available.

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