AUGUSTA — The Maine Center for Disease Control and Prevention said Tuesday that West Nile virus has been confirmed in a Pennsylvania resident who was visiting Maine.

State epidemiologist Dr. Stephen Sears said a federal lab Tuesday confirmed West Nile in a Philadelphia woman who developed symptoms while visiting Maine earlier this month. He said the woman was treated at a Lincoln County hospital and has since recovered.

Sears said it’s believed the woman contracted the virus before she arrived in Maine, so she’s being counted as a Pennsylvania case instead of a Maine case.

So far, there has been no documented case of someone contracting West Nile in Maine, but mosquitoes bearing the virus have been confirmed in the state.

Because there is no vaccine for humans, the CDC recommends avoiding mosquito bites by using repellent, especially around dawn and dusk, wearing long-sleeve shirts, pants and socks, remove standing water in yards, and use window and door screens.

Sears said pet owners don’t have to worry about their pets contracting the disease.

Experiments have infected dogs and cats with the West Nile virus, he said, and the results show they don’t get the disease.

“The reasons I don’t fully understand, but some animals don’t get it.”

Horses, lamas, alpacas and big-game birds do get West Nile, Sears said.