The state veterinarian’s office has quarantined the affected horse’s residence and those horses exposed at the veterinary hospital.
Sixty-six exposed horses in the deceased horse’s barn at Remington Park in Oklahoma City remain sidelined by quarantine.
Four counties in the state have been affected in 2019.
Two horses tested positive; 40 others were exposed to the highly contagious respiratory disease.
The Thoroughbred registry is calling for all U.S. racetracks to join the group.
California has confirmed EHV-1 in two additional febrile horses.
No horses other than the index case showed signs of the disease.
Meanwhile, officials have released 14 premises from quarantine in Nebraska, Utah, and Wyoming.
The California Department of Food and Agriculture continues to monitor the situation in San Bernardino County.
All horses that exhibited clinical signs have been cleared following monitoring.
Officials continue to monitor the situation in San Bernardino County.
The USDA also corrects its previous report of VSV in Duchesne County, Utah.
The horse succumbed to the mosquito-borne disease.
The state’s index case resides in Pickens County.
Records dating to 1942 indicate this is the first recorded equine case of EEE from Leelanau County.
Official have released a previous Alameda County equine herpesvirus quarantine.
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