Animal health officials in California and Virginia have lifted quarantines put in place after horses residing there tested positive for equine herpesvirus-1 (EHV-1).

California

On May 21, the California Department of Food and Agriculture (CDFA) reported that a 7-year-old barrel racing Quarter Horse gelding, originating from San Luis Obispo County, showing mild hind limb ataxia was confirmed positive for non-neuropathogenic EHV-1.

“This strain of virus is responsible for the more common rhinopneumonitis cases,” the CDFA said in a statement at the time. “A small percentage of the non-neuropathogenic infected horses can display neurologic signs compatible with equine herpes myeloencephalopathy (EHM) which is a reportable disease in California

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