Kansas Animal Health Commissioner Justin Smith, DVM, said biosecurity practices will be key to stemming the spread of equine herpesvirus-1 (EHV-1), a highly contagious virus in horses that can cause respiratory issues, abortion and even neurological damage if it progresses to equine herpes myeloencephalopathy (EHM). A recent outbreak in the U.S. has been reported in at least seven states, including Texas, Oklahoma, Wyoming, Colorado, New Mexico, Pennsylvania and Arizona. There have been no reports in Kansas at this time.
EHM results from damage to the blood vessels in the brain and spinal cord. Symptoms include hind-end weakness or incoordination; difficulty standing, walking or urinating; lethargy; and fever or nasal discharge. The mortality rate due to EHM is estimated to be between 30% and 50%. If any symptoms are observed, horse owners should contact their veterinarian immediately.
“I’m told that the first sign you will see is that horses begin dragging their toes,” Smith said. “So, as they’re walking, you can see that their back feet will be dragging. As it progresses, the virus spreads to the spinal cord and will cause paralysis in some horses.”
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