A sixth California horse has tested positive for equine herpesvirus-1 (EHV-1), animal health officials in that state announced Nov. 7.

On Nov. 3, the California Department of Food and Agriculture (CDFA) reported that two Saddlebred horses in Los Angeles County had tested positive for non-neuropathogenic EHV-1. The next day, the CDFA issued an update indicating that three more horses at the index facility  had tested positive.

On Nov. 7, the CDFA said an additional horse had been confirmed positive.

“At the Los Angeles Equestrian Center, a febrile horse displaying mild neurologic signs has been confirmed positive for the non-neuropathogenic strain of equine herpesvirus-1,” the agency said. “One of the six horses was euthanized on Nov. 3 due to the severity of clinical signs. All other confirmed positive horses remain in isolation and under quarantine. All exposed horses remain under quarantine and temperatures are being taken twice daily