The Michigan Department of Agriculture and Rural Development on Thursday announced that lab tests confirmed the diagnosis of Eastern Equine Encephalitis in a Midland County horse that died.
The horse in Clark County tested positive for Eastern Equine Encephalitis. EEE has a 90-percent mortality rate.
Horses usually get it after being bit by mosquitoes that are carrying the virus. County health officials say people also need to avoid mosquito bites. Wisconsin has had only one human case since 1984.
Authorities say that the mosquito population may be wiped out over the next few days from the hard frost and freeze that's hit much of the area the last two mornings.