The first confirmed human case of West Nile virus in IL in 2017 is a Will County man in his 60s.
A Will County resident in his 60s became ill at the end of June.
Lucas said no Boulder County human West Nile cases have been confirmed thus far this year but that there were 23 human cases reported in Boulder County in 2016.
There were 13 cases of West Nile reported in Utah a year ago, according to the Center for Disease Control and Prevention, with one case resulting in death.
Symptoms of West Nile can resemble the flu and include fever, headache and body aches.
"One mosquito pool (batch of mosquitoes) was positive among the mosquitoes collected on July 18 from one out of the 19 traps that are set weekly across the city", said the agency in a news release.
"About eight out of ten people who are infected with West Nile virus won't have any symptoms", Garvey says. There have not been any reported human cases of the virus or the mosquito-transmitted Zika virus, however. Some people may experience a more severe form of the virus, called encephalitis, which is the swelling of the brain. While West Nile can infect people of all ages, people over the age of 50 are at higher risk for severe infection.
The resident lives in Little Elm and was diagnosed with West Nile Fever. For example, DEET should not be used on infants less than two months old, and oil of lemon eucalyptus should not be used on children under three years old.
Avoid spending time outdoors from evening until early morning, when mosquitoes are most active.
Officials say residents should check their property for standing water in light of all the recent rainfall.
Remove standing water that can become breeding ground for mosquitos and install or fix screens to keep mosquitos outside.