Adult mosquitoes are trapped from April to October using gravid or dry ice-baited traps. Once the mosquitoes are collected, they are sent to the Department of Environmental Protection for identification and then onto the Department of Health for virus testing. Mosquito surveillance is intensified if WNV is detected in mosquitoes, birds, other animals, and/or humans.
Dipping is the technique used when sampling mosquito larvae and pupae from their aquatic habitats. Some of the habitats that are surveyed are temporary waters (tire ruts, flood plains, drainage ditches, catch basins), natural cavities (tree holes and rock pools), and artificial containers (tires, buckets, plastic covers over pools, bird baths, water troughs). Larval surveillance is important because it is used for identification of mosquito species and to establish their habitat preferences. Also, when larvae and pupae are identified and counted, this information is used to determine if control measures are necessary in a particular area.
ATTENTION: Adams County Residents Adult mosquito surveillance is being undertaken throughout PA in cooperation with DEP to track the West Nile Virus. Mosquitoes are collected from April through late-October using the traps described below. [Read More]