Four regions of the state remain under a high-risk warning for West Nile, including north-central, south-central, northwest and southwest Kansas.
The case was confirmed after a blood donor in Sanilac County tested positive for the mosquito-borne virus.
Most people - up to 80 per cent, the health unit says - who are infected with West Nile virus do not get sick.
West Nile-positive insects were also caught in Bridgeport, Darien, Easton, New Canaan, Stamford, Stratford and Waterbury earlier this year. People who are elderly, have compromised immunity, have cancer, have alcoholism or other factors that make them more susceptible to a neuroinvasive disease are more at risk.
Yavapai County health officials have found no evidence of West Nile Virus this monsoon season.
There have been no reported cases of anyone in Hartford having West Nile virus at this time. Culex species can carry West Nile Virus while Aedes mosquitoes can carry Zika virus.