The California Department of Food and Agriculture confirmed two new cases of EHV-1 in the previously quarantined barn in Orange County on April 18, 2018. A mare displayed a fever the morning of April 17, 2018 and a horse which 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 displaying a fever on April 18, 2018 tested negative for Equine Herpesvirus-1. The horse will be retested to confirm negative status. Exposed horses under quarantine continue to be monitored with twice daily temperature recordings.
The California Department of Food and Agriculture has confirmed three additional EHV-1 positive horses at the quarantined facility in Orange County. Two horses displaying fevers over the weekend were confirmed positive on April 23 and moved to isolation. An additional horse which had originally tested negative for EHV-1 after developing a fever was sampled a second time, was confirmed positive on April 24, and was also moved into isolation.
This brings the total of confirmed EHV-1 febrile cases to five and one confirmed case of EHM. Enhanced biosecurity measures and twice daily temperature recording for all exposed horses in the quarantine barn continues. CDFA staff continues to be onsite monitoring the situation.
(With files from Equine Disease Communicator Center)