EHM in Indiana: One Case Diagnosed

Veterinarians confirmed one case of EHM in LaGrange County, Indiana. Two other horses on the same property exhibited similar clinical signs.
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ehm in indiana
In many horses, the first or only sign of EHV-1 infection is fever, which can go undetected. | Photo: Kevin Thompson/The Horse

On Dec. 26 the Equine Disease Communication Center (EDCC) reported that veterinarians have diagnosed one case of equine herpesvirus myeloencephalopathy (EHM), the neurologic form of equine herpesvirus-1 (EHV-1), in LaGrange County, Indiana. In addition, two other horses on the same property exhibited similar clinical signs.

“On Dec. 19 the Indiana State Veterinarian confirmed equine herpesvirus myeloencephalopathy in a 9-year-old Belgian mare in LaGrange County,” the EDCC said. “The mare had an onset of clinical signs including recumbency (inability to rise), ataxia (incoodination), and general neurologic signs on Dec. 13.”

Testing at Antech Laboratories via the University of California, Davis, confirmed EHV-1 infection on nasal swab PCR, the EDCC said

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Erica Larson, former news editor for The Horse, holds a degree in journalism with an external specialty in equine science from Michigan State University in East Lansing. A Massachusetts native, she grew up in the saddle and has dabbled in a variety of disciplines including foxhunting, saddle seat, and mounted games. Currently, Erica competes in eventing with her OTTB, Dorado.

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