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Updated information on Equine Herpesvirus Myeloencephalopathy (EHM)

State veterinarians' offices are the best resources for horse owners in affected areas.

By USEF Press Release | 24-May-11

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Stalled horsesUPDATE 6/29/11: The USDA has issued its final situation report on June 23, 2011. The outbreak has been contained. Click here to read more.

As of noon EST on May 20, 2011 cases of Equine Herpesvirus Myeloencephalopathy (EHM) have been confirmed in eight states and in Canada. EHM is the neurological form of Equine Herpesvirus (EHV-1). Please use the state veterinarian in your state as a resource for information and guidance regarding this disease.

Please see the USDA situation report for updated information

Affected States' State Veterinarian Contact Information:

Phone: (916) 654-1447

Phone: (303) 239-4161

Phone: (208) 332-8544

Phone: (503) 986-4680

New Mexico:
Phone: (505) 841-6161


Phone: (801) 538-7162

Phone: (360) 902-1881, (360) 902-1835

Additional Resources:

The United States Department of Agriculture (USDA) situation report, guidance document & new AAEP resources for horse owners is now available.

The USDA:APHIS:VS has recently posted on its website 2011 EHV-1/EHM incident information, including situation reports (listings of suspect and confirmed cases, locations, etc), recommendations for exposed horses and more here: Please check this website weekly for updated situation reports.

In addition, the AAEP now has an updated web page for horse owners with a very informative FAQ targeted for horse owners located here:

Recommendations for show and event managers from UC Davis:

American Horse Council:

Please refer back to these resources frequently to ensure you have the most current information.

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Updated information on Equine Herpesvirus Myeloencephalopathy (EHM)

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i    i, AK

6/5/2011 11:33:26 PM


Gee and Haw    somewhere, CA

5/31/2011 5:28:07 AM

Good reading....


5/27/2011 5:10:23 AM

Thanks!! It is best be prepared with good information.

Galadriel    Lothlorien, ME

5/25/2011 11:13:21 PM

Keeping my horses at home for now.

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