West Nile is transmitted to horses via bites from infected mosquitoes. | Photo: iStock

A 3-year-old Miniature Horse stallion from Pine City, Minnesota, tested positive for West Nile virus (WNV) on July 27, which marks the first equine WNV case in that state in 2018, the Minnesota Board of Animal Health reported Aug. 1.

The attending veterinarian reported that the stallion presented with acute neurologic signs, exhibiting profound weakness in his front limbs, tripping and falling, and requiring assistance to stand. The horse has no documented history of vaccination against WNV and is currently receiving supportive care. A mare and a foal also live on the property and are healthy at this time.

“This case is an unfortunate reminder of why it is so important that owners vaccinate their horses against this disease,” said Minnesota Equine Program Manager Courtney Wheeler, DVM