The Penn State Cooperative Extension staff and the Pennsylvania DEP staff collected 34 new mosquito samples that tested positive for West Nile virus in August, bringing the total this year to 218 positive samples in York County.
The latest positive samples were from Dover, Fairview, Lower Windsor, Manchester, Springettsbury, Windsor and York townships, East Prospect and Red Lion boroughs and York City.
Some of the samples had multiple positives, and two dead birds collected in Fairview and Manchester townships also tested positive.
When mosquitoes carrying West Nile virus transmit the virus to people, it can cause an infection that leads to inflammation of the brain. There have been eight human cases of West Nile in Pennsylvania this year.
The Penn State Cooperative Extension staff and the Pennsylvania DEP staff will continue with additional surveillance and mosquito trapping.