The Metropolitan Mosquito Control District reports that mosquitoes have tested positive for West Nile virus in all seven counties in the Twin Cities metro area. The Minnesota Department of Health is also investigating a number of human infections.

While West Nile remains the greatest mosquito-borne threat in Pennsylvania, state officials are monitoring another virus that has begun popping up in mosquito populations. Jamestown Canyon virus,

West Nile virus appears to be the culprit behind a recent increase in the number of dead loons showing up around Northeastern Minnesota Lakes, the Department of Natural Resources reported Thursday.

— The Wisconsin Department of Health Services announced the state's first deaths from the West Nile Virus this year. Two men, one in his 70s, and the other in his 50s, passed away this month.

Following the report of a sick horse that died last month, the Minnesota Board of Animal Health has confirmed it was the first case of West Nile virus in a horse this year. The unvaccinated 2-year ...