On Wednesday evening, the Philadelphia Department of Public Health’s Vector Control staff will be in the Mann Center area and on the streets surrounding the Mann Center (between Belmont Ave. and Parkside Ave. and the area between 52nd St, Parkside Ave., and Columbia Ave.) applying treatments to control adult mosquitoes. Samples taken by Vector Control staff in the area have revealed the presence of adult mosquito populations that carry the West Nile virus, which, when transmitted to people, can cause West Nile encephalitis, an infection that can result in an inflammation of the brain.

A truck-mounted apparatus will be spraying fine aerosol droplets of Zenivex, a synthetic pyrethroid, which has no residual effects and evaporates quickly into the atmosphere, according to a Department of Public Health statement.

So far this season, one Philadelphia resident has developed severe West Nile virus infection and is recovering. Eighty-six positive mosquito samples have been found within the city and 1,819 statewide this year to date. Last season, there were 112 positive mosquito samples in Philadelphia. 

Mosquitoes are most active at dusk and dawn, and residents are urged to take precautions against WNV by wearing long sleeves and pants and using insect repellent with an Environmental Protection Agency (EPA) registered active ingredient.

For more information about West Nile virus and the State’s surveillance and control program, go to www.westnile.state.pa.us.