Neurologic EHV-1: An Overview

The neurologic form of EHV-1 is highly contagious in horses and multiplies within its host very rapidly.
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The neurologic form of equine herpesvirus-1 (EHV-1, also called myeloencephalopathy) is highly contagious and multiplies within its host very rapidly, making early detection and prompt treatment paramount goals in disease control. During a presentation at the 2011 Western Veterinary Conference, held Feb. 20-24 in Las Vegas, Nev., Steve Reed, DVM, Dipl. ACVIM, an associate at Rood & Riddle Equine Hospital, in Lexington, Ky., discussed the current methods for diagnosing, treating, and preventing EHV-1.

"Outbreaks (of EHV-1) have occurred across the world but recent outbreaks in the U.S. have helped raise awareness of the disease," Reed said.

Earlier this year, a large-scale EHV-1 outbreak killed or sickened dozens of horses in the western U.S. and Canada. The outbreak was believed to have stemmed from a single horse show held in early May in Odgen, Utah.

In early 2003 another EHV-1 outbreak killed 12 horses and caused neurologic signs in 30 additional horses at the University of Findlay’s English equestrian center. Of the 135 horses on the premises, 117 showed clinical signs associated with EHV-1, including fever and respiratory abnormalities

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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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