The Erie County Department of Health confirms that a mosquito sample collected in the City of Erie and two mosquito samples collected in Harborcreek Township on July 16, 2025, have tested positive for West Nile virus. These are the fourth, fifth and sixth mosquito samples to test positive in Erie County in 2025. At this time no human cases have been reported in Erie County.
Additional monitoring for mosquitoes will be done in the areas where the mosquito groups were collected. Appropriate control work will be conducted, depending on the number and types of mosquitoes that are found.
Certain species of mosquitoes carry West Nile virus. When transmitted to people, this virus can cause West Nile encephalitis, an infection that can result in an inflammation of the brain. Anyone can get the virus, but older adults and people with compromised immune systems have the highest risk of developing severe illness because their bodies have a harder time fighting off disease.
The public can reduce the number of mosquitoes around their home and neighborhood by eliminating standing water, in which mosquitoes can breed, by following these guidelines:
- Dispose of any refuse that can hold water—such as tin cans, containers, and in particular used
tires. Tires have become the most important mosquito breeding ground in the country. - Drill holes in the bottoms of recycling containers and check uncovered junk piles.
- Clean clogged roof gutters every year, and check storm drains, leaky faucets, and window wells.
- Empty accumulated water from wheelbarrows, boats, cargo trailers, toys, and ceramic pots. If
possible, turn them over when not using them. - Do not allow water to stagnate in birdbaths, ornamental pools, water gardens, and swimming pools
or their covers. Ornamental pools can be aerated or stocked with fish. Swimming pools should be
cleaned and chlorinated when not in use. - Products such as “mosquito dunks” can be obtained from garden centers.
- Make sure window and door screens are “bug tight.”
- Use the proper type of light outside: incandescent lights attract mosquitoes, while florescent lights
neither attract nor repel mosquitoes. - Stay indoors at dawn, dusk, and in the early evening when mosquitoes are most active. If you must
go outdoors, wear a long-sleeved shirt and long pants. - Insect repellants with DEET can be applied (sparingly) to exposed skin and will deter mosquitoes
from biting. Spray thin clothing with repellent since mosquitoes can bite through it. Be sure to follow
all directions on product labels. - Mosquitoes are repelled by high winds, so electric fans may provide some relief at outdoor events.
More information is available on the website www.westnile.state.pa.us.
