As of December 5, 2025, the Oregon Department of Agriculture (ODA) reports that there are no confirmed cases of Equine Herpesvirus-1 (EHV-1) in Oregon. The agency continues to monitor the situation and is committed to protecting equine health across the state.
The ODA urges horse owners and managers of equine facilities to remain vigilant and maintain good biosecurity practices. This comes as equine events continue throughout Oregon under current regulations. Owners are encouraged to be alert for any symptoms associated with EHV-1.
To reduce the risk of EHV-1 transmission, the ODA recommends isolating new or returning horses for at least 21 days before introducing them to existing herds. Equipment such as water buckets, tack, and grooming tools should not be shared between horses. Regular disinfection of stalls, trailers, and equipment—especially after travel or events—is advised. Daily monitoring for signs of illness, including fever, nasal discharge, or neurological symptoms like incoordination or trouble standing, is recommended. Limiting direct contact between horses at shows and boarding facilities can also help prevent spread. Owners are urged to consult a veterinarian immediately if illness is suspected.
The ODA encourages the community to stay informed about EHV-1 by accessing resources on past cases in Oregon and seeking updates on equine diseases from national organizations such as the Equine Disease Communication Center (EDCC).
“Thank you for your continued efforts to keep Oregon’s equine community healthy and safe,” states the Oregon Department of Agriculture.
For more information or concerns regarding animal health, individuals can contact the Animal Health Program at 503-986-4680.
