MAINE PUBLIC • August 21, 2025
Mosquitoes in Portland have tested positive for West Nile Virus. The Maine Center for Disease Control says it's the first mosquito pool to test positive for the disease this year. Four wild birds in Kennebec, Sagadahoc, and York counties have also tested positive this year for West Nile. In humans, the disease can cause flulike symptoms and, in severe cases, brain swelling and meningitis. Last year, an adult in Cumberland County tested positive for the virus. State CDC officials urge people with symptoms to see a health provider, especially if a COVID-19 test is negative. West Nile Virus is spread through mosquitoes, which can also carry Eastern Equine Encephalitis and Jamestown Canyon virus.