Equine Herpes Virus Myeloencephalopathy (EHM)
Equine Herpes Virus Myeloencephalopathy (EHM) is the neurotropic form of EVH-1, most often attributed to mutant or neuropathogenic strains of EVH-1. There is currently no licensed vaccine against EHM and no treatment other than palliative care.
The disease is highly contagious, and can spread through the air as well as through objects that have been in contact with infected horses.
The disease rose to worldwide public prominence in early 2011, due to an outbreak centered on the National Cutting Horse Association (NCHA) Western National Championships held in Ogden, Utah from April 29 to May 8, 2011. The outbreak lasted approximately two months, generating 90 confirmed cases of the disease, spread over 10 American states, and resulting in the deaths of 13 horses before it was declared contained by the US Department of Agriculture.
Read more about this topic: Equine Herpesvirus 1
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—Henry David Thoreau (1817–1862)