Six mosquito samples from Berks County tested positive for the West Nile virus on Wednesday, the state Department of Environmental Protection said.
Also in the release on Wednesday were more details about continued West Nile virus testing of mosquitoes in York County, which now ranks first in the state with 291 positive samples.
"This is should serve as a reminder to all residents to take steps to prevent mosquitoes and West Nile virus", Health Department spokeswoman Aislyn Tolman-Hill said in the release.
The spraying is a "precautionary measure", Knuth said, since the species of the mosquitoes found to have West Nile Virus "belongs to a subspecies of the genus Culex that is a predominantly bird biting insect".
Residents are urged to take precautions against West Nile virus by using mosquito repellent, by eliminating standing water where mosquitoes breed and by wearing long sleeved shirts and long trousers when outside during dusk or dawn when mosquitoes are most active.
The bad news is that Louisiana leads the nation in reported cases of West Nile this year with 10 cases. Use a repellent with DEET (N, N-diethyl-m-toluamide), permethrin, picaridin (KBR 3023), IR3535 or oil of lemon eucalyptus [p-methane 3, 8-diol (PMD)] according to the instructions on the product label.
A few people - about 1 in 150- who are infected can develop a severe illness affecting the central nervous system.
".About 80 percent of people infected with West Nile Virus will never know they're infected".
- Dispose of tin cans, ceramic pots and other unnecessary containers on your property.
When possible, reduce outdoor exposure at dawn and dusk during peak mosquito periods, usually April through October.
Mosquito-proof your home. Install or fix screens on windows and doors to keep mosquitoes outside.
Make sure to drill holes at the bottom of containers that are used for recycling. Turn over wheelbarrows, plastic wading pools, buckets, trash cans, children's toys or anything that can collect water.
Aerate ornamental pools or stock them with fish.
Smith also said that mosquitoes carrying West Nile, generally known as a house mosquito or a Northern house mosquito, are only active during evening hours.