The Chicago Department of Public Health announced on Friday that the first batch of mosquitoes that tested positive for the West Nile virus were found in the city. This comes after other batches tested positive for the virus in Glenview and in McHenry and DuPage counties.

It is not uncommon for West Nile to be detected in local mosquito pools. Last year, Louisiana recorded 617 positive mosquito pools, including four in New Orleans, and three people died of the virus last year, according to the Louisiana Department of Public Health.

BAY COUNTY, Mich. (WNEM) - Bay County Mosquito Control reports it’s discovered the first evidence of West Nile Virus this year. The agency said it was discovered in a mosquito sample from Bangor Township. Mosquito control added that it is enhancing efforts in those areas to reduce adult and larval populations.