Equine Herpes Myeloencephalopathy (EHM) Updates:
New San Mateo County Quarantine
November 7, 2018: A 24 year old Arabian mare, originating from a San Mateo
County facility, displaying neurologic signs has been confirmed positive for
Equine Herpesvirus Myeloencephalopathy. 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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