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- Neurologic

Orange County, CA

Outbreak Identifier: 5101

Alert ID: 2455

March 05, 2022

Quarantine Released

Source: California Department of Food and Agriculture

Number Confirmed: 3;
Notes: A 10-year-old Warmblood gelding in Orange county displaying neurological signs was confirmed positive for Equine Herpesvirus Myeloencephalopathy (EHM) secondary to equine herpesvirus-1 (EHV-1 non-neuropathogenic strain) on March 4th. Febrile horses were reported on the premises prior to this EHM case confirmation, including two (2) horses that tested positive for EHV-1. CDFA has been onsite and will quarantine any exposed cohorts. There is no known epidemiological link to any other current EHM incidents at an event premises.;

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