It's the first positive test for the virus in the city this year, the city said in a press release.
Staff said they've planned to visit those areas on Tuesday "to pass out mosquito protection and prevention educational materials and monitor standing water looking for mosquito larvae".
The positive result was discovered in a trap located in Lower Central Hamilton and has prompted the city to bump the risk of West Nile virus from low to moderate.
According to the Health Department, there were two human cases of West Nile confirmed in Lake County, and there have been 58 cases and two confirmed deaths since 2002.
Mosquitoes that can carry the virus are most active during dusk and dawn.
Denton County Public Health (DCPH) is reporting its first human case of West Nile virus (WNV) for 2017 in Denton County. "This year we're having more activity with more mosquitoes, and two samples that have tested positive in the City of Clovis and one sample that tested positive in Kings County".
An east Pierce County man has recovered after he contracted West Nile Virus during a recent trip to California.
Some tips to avoid getting bitten this summer include wearing long-sleeved shirts and trousers, especially in mosquito-prone area, and wearing bug repellent containing DEET. Some people may experience a more severe form of the virus, called encephalitis, which is the swelling of the brain.
Up to 20 percent of the people who become infected have symptoms such as fever, headache, and body aches, nausea, vomiting, and sometimes swollen lymph glands or a skin rash on the chest, stomach and back.
Mosquito season is ramping up in Elkhart County, and the West Nile virus is tagging along for the ride.
Drain standing water in yards that can collect in old tires, potted plant trays, pet dishes, toys or buckets.
Change water in birdbaths, fountains, wading pools, and animal troughs weekly.
MORE FROM THE CDC: You can reduce your risk of being infected with WNV by using insect repellent and wearing protective clothing to prevent mosquito bites.