21 More Mosquito Samples Test Positive For West Nile Virus In Suffolk County

SUFFOLK COUNTY, NY — Twenty-one more mosquito samples have tested positive for West Nile virus in Suffolk County, Suffolk County Health Commissioner Dr. Gregson Pigott announced Wednesday.

The mosquito samples were collected in Copiague (2), Dix Hills (1), Lindenhurst (1), Northport (1), Melville (1), Bay Shore (1), Port Jefferson Station (2), Rocky Point (2), Selden (1), Farmingville (2), Riverhead (1), and Shelter Island (1), Greenlawn (1), St. James (2), Islip (1), and Brentwood (1). The samples, all Culex Pipiens-restuans, were collected on Aug. 12, 13, 19, and 20, 2025.

To date this season, 111 mosquito samples have tested positive for West Nile virus, and four mosquito samples have tested positive for Jamestown Canyon virus. One bird has tested positive for West Nile virus this season.

No humans have tested positive for the virus this year, to date.

"While mosquito activity decreases when temperatures drop, many are still present and biting through October," Pigott said. "We encourage residents, especially those over age 50, to continue to take precautions."

West Nile Virus

West Nile virus, first detected in birds and mosquito samples in Suffolk County in 1999 and again each year thereafter, is transmitted to humans by the bite of an infected mosquito. Suffolk County reported 21 human cases of West Nile virus in 2024 and five in 2023. Nine people have died from West Nile virus since 2000.

It is estimated that 20 percent of those who become infected will develop clinically noticeable symptoms of West Nile virus disease. Mild symptoms may include fever, headache and body aches, skin rash and swollen lymph glands. More severe symptoms include high fever, headache, neck stiffness, stupor, disorientation, coma, tremors, convulsions, muscle weakness, vision loss, numbness and paralysis.

West Nile virus can be fatal. Residents who experience symptoms are advised to visit their healthcare providers. While there is no specific treatment for West Nile virus, patients may be offered supportive therapy as needed.

People who are most at risk for severe infection include those over 50 years of age and those with chronic illness or compromised immune systems. Suffolk County residents are urged to take precautions to avoid being bitten by mosquitoes during mosquito season, which extends from June 1 through Nov. 1.

Pigott offered the following tips to avoid mosquito bites:

• Minimize outdoor activities between dusk and dawn.
• Wear shoes and socks, long pants and long-sleeved shirts when mosquitoes are active.
• Use mosquito repellent, following label directions carefully.
• Make sure all windows and doors have screens, and that all screens are in good repair.
• Keep mosquitoes from laying eggs inside and outside of your home. Once a week, empty and scrub, turn over, cover, or throw out containers that hold water, such as vases, pet water bowls, flowerpot saucers, discarded tires, buckets, pool covers, birdbaths, trash cans and rain barrels.
• Download a copy of Suffolk County’s informational brochure “Get the Buzz on Mosquito Protection,” available in English and Spanish, and share it with your community.

Dead birds may indicate the presence of West Nile virus in the area. To report dead birds, call the Bureau of Public Health Protection at 631-852-5999 from 9 a.m. to 4 p.m., Monday through Friday.Residents are encouraged to take a photograph of any bird in question.

To report mosquito problems or stagnant pools of water, call the Department of Public Works’ Vector Control Division at 631-852-4270.

For further information on West Nile virus, visit the Department of Health Services’ website.