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: 2450

March 01, 2022

Outbreak Update

Source: California Department of Food and Agriculture

Number Confirmed: 26;
Number Suspected: 5;
Facility Type: Showgrounds;
Notes: Update 3/1/22: previous alerts: 2416, 2424, 2430, 2432, 2436, 2437, 2444: One (1) additional horse that had attended the event in Riverside County and had subsequently returned to his home premises in Sonoma County displaying fever only with no neurologic signs was confirmed positive for EHV-1. The horse is currently isolated and under veterinary treatment at an offsite facility for an unrelated condition. Three (3) additional horse on the index event premise, one (1) inside and two (2) outside of the index quarantine barn, displaying fever only with no neurologic signs was confirmed positive for EHV-1. To date, there have been three (3) confirmed EHM cases (EHV-1 infection with neurological signs) and twenty-three (23) 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.;

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