Three cases of the neurologic form of equine herpesvirus-1 (EHV-1) have been confirmed in Orange County, Calif., according to a statement from the California Department of Food and Agriculture.

On Jan. 11 a gelding residing on a "large multi-discipline facility with no movement of horses on or off the property" tested positive for the debilitating virus. He was quarantined on the farm and is receiving veterinary care, the statement said.