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Equine Herpesvirus Myeloencephalopathy (EHM) Outbreak
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Disease Alerts

Updates on current disease outbreaks are listed here as they occur and will include the date listed, disease name, location and current status. Specific premises will not be named but the general location by town, county and state will be listed. When locations, events or horses are at risk they will be listed. Updates will be posted as they are received.



Logan County, OK
Outbreak Identifier: 7194
Type: EHV-1
Alert ID: 4719
November 19, 2025
Confirmed Case(s) - Official Quarantine

Oklahoma State Veterinarian

Number Confirmed: 2; 
Comments: For more information, about EHM cases in Oklahoma and Texas tied to the Women’s Professional Rodeo Association (WPRA) World Finals and Elite Barrel Race event held Nov. 5-9 in Waco, Texas, and the cancellation of the Barrel Futurities of America (BFA) World Championship, scheduled for Nov. 17-22 at Lazy E Arena in Guthrie, OK., please visit HERE 

For an up-to-date count of EHM cases tied to this outbreak, please visit HERE