NATIONAL UPDATE – Thursday, June 2

The U.S. Department of Agriculture, APHIS, Veterinary Services has released a new report updated the status of the EHV-1 outbreak. Click here to download a PDF copy of the report.


COLORADO – Monday, May 23
The Colorado Department of Agriculture announced new travel requirements for horses entering Colorado, Monday May 23.

Standard requirements for horses entering Colorado include a health certificate issued within 30 days of their arrival and a negative Coggins test within 12 months. The new requirement consists of a permit to enter the state. Horse owners who wish to bring their horse into Colorado must first call their veterinarian. That veterinarian can then contact the Colorado Department of Agriculture’s State Veterinarian’s Office at (303) 239-4161 and request a permit number. That number would then be included on the health certificate.

As of noon on May 23, there were nine confirmed cases of Equine Herpesvirus (EHV-1) in Colorado, with another 22 suspected cases. Twelve quarantine and hold orders have been issued in 8 counties, including Bent, Boulder, Garfield, Gunnison, Larimer, Mesa, Morgan and Weld. Two horses that tested positive for EHV-1 were euthanized after showing severe neurological signs associated with the disease.

Colorado State Fair organizers have voluntarily cancelled three equine events following the spread of EHV-1. The Sagebrush Slide Cow Horse Show, originally scheduled June 1-5, has been rescheduled for Aug. 10-14. The Mounted Shooting Regional originally scheduled May 27-30 will now take place Oct. 7-10. A new date for Zamora Roping, originally scheduled for May 20-22, is pending.

CALIFORNIA – Monday, May 23
The California Department of Food and Agriculture has one new confirmed case of Equine Herpes  Myeloencephalopathy (EHM) caused by EHV-1. There are 18 confirmed EHM cases in the state.

The positive confirmed cases are  located in the following 12 counties: Amador (1), Glenn (2), Kern (2), Los  Angeles (1), Marin (1), Napa (1), Placer (3), Plumas (1),  Sacramento (1), Shasta (1),  Stanislaus (3), Ventura (1).

Sixteen of the confirmed positive EHM cases participated in the National Cutting Horse Association’s Western National Championships in Ogden, Utah.

Two of the confirmed positive EHM cases participated only in the Kern County Cutting Horse Event on May 13 in Bakersfield, CA.  

One confirmed positive EHM horse was euthanized after showing severe neurological signs associated with EHM. Three confirmed positive EHM horses are being treated at the University of California Veterinary Medical Teaching Hospital in Davis. Seven positive horses have displayed neurological signs. Ten cases have displayed an increased  temperature. One horse has not displayed any clinical signs.

All positive confirmed EHM cases are under a State Quarantine.

UTAH – Monday, May 23
As of noon Monday, May 23, there are four quarantined facilities (in Box Elder, Davis, Kane and Utah counties) with a total of seven confirmed cases and eight suspect cases on these premises. Two of the cases were humanely euthanized after going down and unable to return to their feet.

It was reported that a facility in Weber was under quarantined over the weekend. This facility was actually in Davis County.

Click here to read state-by-state updates posted May 16-20.


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