The California Department of Food and Agriculture (CDFA) reported Jan. 10 that a 12-year-old Quarter Horse mare displaying severe neurologic signs of disease has tested positive for non-neuropathogenic equine herpesvirus-1 (EHV-1).

“Due to the severity of clinical signs the horse was euthanized,” the CDFA said. “The premises of 56 exposed horses in Los Angeles County has been placed under quarantine and all horses are being monitored for clinical signs with twice daily temperature monitoring.”

Additionally, the CDFA said, a febrile 32-year-old horse residing on the index property tested positive for non-neuropathogenic EHV-1 on Jan. 10.

“This horse has been placed in isolation on site,” the agency said

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