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: 2430

February 18, 2022

Outbreak Update

Source: California Department of Food and Agriculture

Number Confirmed: 6;
Number Suspected: 2;
Number Exposed: 60;
Facility Type: Showgrounds;
Age: 13; Gender: Gelding; Breed: Welsh Cross; Onset of Clinical Signs: 2/9/2022;
Clinical Signs: Fever; Confirmation Date: 2/17/2022; Horse Status: Affected And Alive;
Notes: Update 2/18/2022 Previous alerts 2416 and 2424: One (1) additional horse on the event premises housed outside of the index quarantine barn displaying fever only with no neurologic signs was confirmed positive for EHV-1. The positive horse has been placed in isolation and all horses in the exposure cohort have been quarantined and isolated in a separate area on the index premises. Two previous fever-only EHV-1 positive horses that were already in isolation have shown neurological signs and are under veterinary supervision. To date, there have been three (3) confirmed EHM cases (EHV-1 infection with neurological signs) and three (3) confirmed EHV-1 fever-only cases for this incident. CDFA continues to be on site at the premises and is actively monitoring the situation.; For more information go to EHM factsheet.

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