Pennsylvania Advises Residents To Take Precautions Against Mosquitos

Summer brings many people outdoors, but it also ushers in some of the most annoying pests, such as mosquitoes. These insects can bring with them a host of complications – one of which is the West Nile Virus. In an effort to educate the public, the Pennsylvania Department of Environmental Protection (DEP) has issued an official release to encourage residents to Fight the Bite and protect themselves.

“The best parts of summer aren’t itchy bites and being sick, so we want people to protect themselves from mosquitoes and mosquito-borne illnesses,” said Acting DEP Secretary Ramez Ziadeh. “It doesn’t take much to Fight the Bite and protect yourself and your family from mosquitoes. Common sense and insect repellent can go a long way towards a safe and happy summer.”

One human case of West Nile Virus (WNV) has already been reported in Pennsylvania this year. Symptoms of WNV in humans are typically similar to a mild case of the flu. However, the virus can lead to more serious conditions, including brain swelling, muscle convulsions, coma, paralysis, and death. Since DEP first began monitoring for the virus in 2000, there have been 48 fatal cases of West Nile Virus in Pennsylvania.

There are many things people can do to protect themselves from mosquitoes.

  • Eliminate standing, stagnant water near your home – bird baths, kiddie pools, and other outdoor decorations can be mosquito breeding grounds if the water sits for a few days.
  • Keep gutters clean of debris.
  • Wear insect repellent or long sleeves when mosquitoes are active, usually around dawn and dusk.
  • Repair window screens to prevent mosquitoes from entering your home.
  • Clean up litter in your neighborhood. Just a single cap from a plastic bottle can be home to 300 mosquito eggs.

“Standing water is where mosquitoes breed, and it doesn’t take much for mosquitoes to lay eggs,” said Jennifer Stough, Water Program Specialist for DEP’s Vector Management Program. “Mosquitoes are weak flyers and won’t travel far from where they are born – if there are mosquitoes in your backyard or neighborhood, they are likely laying eggs there as well. If you’re being bitten by mosquitoes, they are 9 times out of 10 coming from your property. Get rid of even small amounts of standing water around your home.”

“It doesn’t take much for several hundred mosquitoes to be born. The small pool of water that collects in a single upturned bottle cap is an incubator for as many as 300 mosquito eggs,” said Stough. “Mosquitoes acquire the virus by biting infected birds and transmit the virus to people through a subsequent bite.”

Use of commonly sold insect repellents, like those using DEET, Picaridin, or other EPA-registered repellants, can also cut down on mosquito bites and possible exposure to the virus. Long pants and sleeves are also an important way to cut down on possible exposure to mosquitoes.

“With the right precautions, it’s possible to be safe and still get all of the physical and mental health benefits that having fun outdoors provides,” Department of Conservation and Natural Resources Secretary Cindy Adams Dunn said.

“Pennsylvanians should take proper precautions when outside and in high-risk areas where mosquitoes tend to congregate such as places with stagnant pools of water,” Acting Secretary of Health and Pennsylvania Physician General Dr. Denise Johnson said. “Simple awareness and a few self-protective measures are the best ways to protect yourself and keep your loved ones safe.”

DEP conducts regular surveillance and control to manage mosquito populations around the state. As of July 15, 2022, DEP and county vector programs have detected 68 WNV-infected mosquito pools in 19 counties.

DEP and county partners throughout the state will also conduct routine, localized spraying to control infected adult populations of mosquitoes. These operations are conducted when and where deemed necessary based on recent population survey results.

“Control operations are a strong tool, but they are not a substitute for preventive measures like eliminating standing, stagnant water,” said Stough.

DEP will continue to survey affected communities to monitor mosquito activity and WNV. DEP biologists have initiated a survey of the mosquito population to determine the risk for further human illness. If necessary, adult mosquito populations will be reduced. These efforts will continue through October.

More information on mosquitoes, WNV, and other mosquito-borne diseases can be found at