ehm in arizona
In many horses, the first or only sign of EHV-1 infection is fever, which can go undetected. | Photo: The Horse Staff

The Equine Disease Communication Center (EDCC) reported March 28 that another horse in Maricopa County, Arizona, has been diagnosed with equine herpesvirus myeloencephalopathy (EHM), the neurologic form of equine herpesvirus-1 (EHV-1).

A 20-year-old Quarter Horse mare developed severe neurologic signs on March 25 and was ultimately euthanized, the EDCC said. Test results confirmed EHV-1 infection on March 27.

The Arizona Department of Agriculture said this case is not associated with the one confirmed in the same county earlier this week,  the EDCC added

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