West Nile virus has been detected in multiple mosquito groups in Salt Lake County, health officials announced Wednesday. Why it matters: Although most human cases are asymptomatic, some infections can cause serious illness,

This year, 10 birds from nine Michigan counties — now including Lenawee — and one human case from Livingston County have tested positive for West Nile.

A CT town’s Health Department has been informed that a trapped mosquito has tested positive for the West Nile Virus as of June 30, according to a release.