Two additional Orange County, Calif., horses have tested positive for the neurologic strain of equine herpesvirus-1 (EHV-1), according to a statement from the California Department of Food and Agriculture (CDFA). The two most recently confirmed cases brings the total case count in the current outbreak to five.

On Jan. 11 a gelding residing on a "large multidiscipline 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.