GORHAM (AP) — The Maine Center for Disease Control and Prevention says West Nile Virus has been found in a second mosquito population, this time in Gorham in Cumberland County.

Officials said Thursday it’s the second mosquito pool from Maine to test positive this year. The first, confirmed last week, was found in the town of Lebanon in York County.

So far, there has been no confirmed human case of West Nile in Maine.

State epidemiologist Dr. Stephen Sears said the state is investigating two separate cases for the possible human exposure to West Nile and Eastern Equine Encephalitis. Testing is being conducted by a federal lab.

Both viruses are transmitted by infected mosquitoes. Sears says the possible West Nile case involves an out-of-state resident who fell ill while visiting Maine.