Positive Neurologic Herpesvirus Horse in Orange County, California

A horse in Orange County, California, was confirmed with neurologic herpesvirus.
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Orange County, California, is the site of the most recent equine herpesvirus positive in California.

On April 13, 2018, the California Department of Food and Agriculture (CDFA) confirmed equine herpesvirus myeloencephalopathy (EHM) in a 17-year-old Thoroughbred gelding originating from an Orange County facility. The gelding was displaying neurologic signs and has been isolated offsite and placed under quarantine. 

Exposed horses will be monitored for clinical signs and temperatures will be taken twice daily. Any horse displaying a fever or compatible clinical signs will be tested. 

CDFA staff is onsite and will continue to monitor the situation.