The California Department of Food and Agriculture confirmed two new cases of equine herpesvirus type 1 (EHV-1) in the previously quarantined barn in Orange County on April 18, 2018. The first case was a mare that had a fever the morning of April 17, and the second was a horse that was febrile for one day on Sunday, April 8. Both horses have been placed in separate quarantine isolation stabling on the property. 

An additional horse that had a fever on April 18 tested negative for EHV-1. The horse will be retested to confirm negative status. 

Exposed horses under quarantine continue to be monitored with twice daily temperature recordings. CDFA staff continues to be onsite to monitor the situation. 

For more information go to https://www.cdfa.ca.gov/ahfss/animal_health/equine_herpes_virus.html.