Dauphin County is reporting its first human case of West Nile virus this year.
The infection, confirmed by the state departments of Health and Environmental Protection, is the second human case of West Nile in Pennsylvania this year.
An earlier case was reported in Philadelphia.
County commissioner Jeff Haste said the infection should serve as a reminder to take proper precautions when outdoors.
Certain species of mosquitoes carry West Nile virus which, when transmitted to people, can cause West Nile encephalitis, an infection that can result in an inflammation of the brain.
Symptoms include fever, headache, body aches, nausea and sometimes swollen lymph glands or skin rash.
According to the Centers for Disease Control and Prevention, all residents of areas where virus activity has been identified are at risk, and people over age 50 have the highest risk of severe infection.
A total of 31 infected mosquitoes have been collected this year in Dauphin County.
Positive samples were collected in Harrisburg, Millersburg, Steelton and in Conewago, Derry, East Hanover, Londonderry, Lower Paxton, Middle Paxton, South Hanover, Susquehanna, Swatara, Washington and Williams townships.