VIRGINIA BEACH -- There have been five positive mosquito tests over the last three weeks for West Nile Virus, Virginia Beach Public Works announced Thursday.

The first group of mosquitoes was collected near Redwing Park on July 23. The second pool was collected in the Thalia subdivision on July 28. The most recent positive pools were collected August 4, 5 and 6 in the Kings Grant subdivision, in the Windsor Woods neighborhood, and on Old Dam Neck Road in Ocean Lakes.

This is not an unusually high number of positive cases, but it does indicate increasing disease activity and warrants action, officials said.

Mosquito Control has increased their spraying program in these affected areas. Night ULV crews have treated the first two areas and will be spraying the three most recent positive test sites tonight or as soon as weather permits. Daytime crews will focus on treating any standing water in the affected areas.

People who live in these areas or who spend a lot of time outdoors should take precautions to avoid mosquito bites, including:

Try to minimize outdoor activity around dusk and dawn when mosquitoes are most active
Wear long, loose, light colored clothing
Use an appropriate insect repellant and follow label instructions.
Get rid of any standing water on your property. This offers a prime breeding area for mosquitoes.

Although WNV can lead to severe illness in humans, less than 1 percent of those infected develop serious neurological problems. Property owners at the trapping sites have been contacted and advised, and lab officials will continue to consult with the other mosquito control districts throughout the Hampton Roads region.

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