Five townships produce first evidence of virus in county this year, says Health Dept. Mosquitoes trapped in Birmingham Township have tested positive for West Nile Virus (WNV), the Chester County Health Department reported Thursday. Tests on mosquitoes collected in Birmingham, Schuylkill, Thornbury, Upper Uwchlan and Uwchlan Townships represented the first positive results in Chester County … Continue reading Birmingham mosquitoes test positive for West Nile