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

Riverside County, CA

Outbreak Identifier: 5086

Alert ID: 2436

February 24, 2022

Outbreak Update

Source: California Department of Food and Agriculture

Number Confirmed: 19;
Number Suspected: 5;
Facility Type: Showgrounds;
Notes: Update 2/24/22: Previous alerts 2416, 2424, 2430 and 2432: Three (3) horses that had attended the event in Riverside County and had subsequently returned to their home premises, displaying fever only with no neurologic signs were confirmed for EHV-1. The horses are located in Santa Barbara, Venture and San Mateo counties. The positive hroses have been isolated and will be quarantined on their home premises, along with any exposed cohorts. Three (3) additional horses on the index event premise, outside of the index quarantine barn, displaying fever only with no neurologic signs were confirmed positive for EHV-1. To date, there have been three (3) confirmed EHM cases (EHV-1 infection with neurological signs) and sixteen (16) confirmed EHV-1 fever-only cases associated with this incident. CDFA continues to be on site at the event premises and is actively monitoring the situation. For more information about EHM go to the EHM factsheet.;

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