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West Nile Virus found in Wisconsin horse

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Staff Writer | August 1, 2017
An unvaccinated yearling Standardbred cross colt from Clark County is the first reported Wisconsin horse to have become infected with West Nile Virus (WNV) and euthanized this year.
Wisconsin horse
Virus   Symptoms include depression and appetite loss
"It's been a very wet summer so far this year, which contributes to a growing mosquito problem," says Dr. Julie McGwin, equine program veterinarian for the Wisconsin Department of Agriculture, Trade and Consumer Protection.

West Nile Virus is caused by a virus transmitted by mosquitoes, and may cause encephalitis, or inflammation of the brain, and is fatal to horses in 30 percent of cases.

Symptoms in horses include depression, appetite loss, drooping eyelids and lower lip, fever, weakness, twitching, paralysis or lack of coordination, aimless wandering, circling and blindness.

The virus is not contagious between horses, but can be carried by mosquitos from an avian, or bird, host to horses and humans. While humans may also be infected by WNV, the virus does not pass directly between people and horses.

Mosquitoes biting warm-blooded animals is the only route of transmission.

Horses that have not already been vaccinated this year for WNV or other mosquito-borne diseases are at greater risk.


 

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