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.

Disease

Outbreak States

Start Date

End Date

Equine Infectious Anemia

Orange County, CA

Outbreak Identifier: 6544

Alert ID: 4062

October 17, 2024

Outbreak Update

Source: California Department of Food and Agriculture

Number Confirmed: 12;
Number Suspected: Unknown;
Number Exposed: Unknown;
Number Euthanized: 12;
Comments: The previous three (3) horses that were in quarantine for close exposure on the Orange County premises were re-tested and confirmed positive for EIA. During our ongoing investigation into this case an additional thirty-six (36) potentially exposed horses on the premises, all within the same training group, were tested and two (2) horses in this group were confirmed positive for EIA. A confirmed EIA positive equid must be euthanized or quarantined for life 200 yards away from any EIA negative equid as per USDA EIA program rules. Euthanasia was elected for these five (5) confirmed cases and witnessed on October 16th by CDFA veterinarians. This brings the total number of positives in this cohort to twelve (12) horses in California. Close contact horses to the affected cases deemed potentially exposed, will remain under quarantine until their sixty (60) day retest samples are completed as per CDFA and USDA program requirements.;
Previous Alerts: 4020, 4018

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