EHV-1 Contained in Colorado

LAKEWOOD, Colo. – The Colorado Department of Agriculture’s State Veterinarian’s office has released a number of quarantine and hold orders associated with the recent spread of Equine Herpesvirus (EHV-1) in the state; the disease is considered contained within Colorado and no new cases have been confirmed since May 20, 2011.

“I’m proud of the coordinated effort by the horse industry, veterinarians, event coordinators, and our office. Without the proactive collaboration of all involved, this disease could have had an even greater negative impact on Colorado’s horse industry,” said State Veterinarian, Dr. Keith Roehr.

As of 6/22/2011:

  • Colorado had 9 confirmed cases of horses with EHV-1.
  • Two horses, which tested positive for EHV-1, were euthanized after showing severe neurological signs associated with the disease. 
  • There are currently no suspect cases. 
  • Two facilities remain under quarantine or a hold order but those facilities are on track to be released soon.  

 “This is great news for Colorado’s horse industry and it seems this disease hit its peak in May but I want to caution horse owners that this outbreak serves as a good reminder that proper disease prevention efforts are important anytime you travel with livestock. This outbreak also demonstrates how our animal health and disease control processes work together for successful outcomes,” said Roehr.

 Travel Tips for Horse Owners Traveling To or From Colorado

1.      Contact the State Veterinarian’s Office of the destination state to find out if travel requirements have changed for that state.

2.      Call organizers of the event to see if they have new health requirements.

3.      If traveling, practice appropriate biosecurity measures.  Biosecurity tips may be found at

4.      Isolate any new animals and those returning to the home premises for three weeks when possible.

5.      Use separate water, feed supplies and equipment.

New Travel Requirements for Horses Entering Colorado

The new travel requirements for horses entering Colorado remain in effect until further notice.  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.  Additional resources can be found at

Contact Information

  1. If veterinarians or horse owners have questions about the disease, testing, or other aspects of the investigation:
    1. Contact your local veterinarian
    2. Dr. Kate Anderson, 303-239-4161,
    3. Dr. Carl Heckendorf, 303-239-4161,

Filed Under: AgricultureBusinessCountyEconomyFeatured


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