First Human Case of West Nile Virus Reported in Williamson County for 2020

Williamson County and Cities Health District

The Williamson County and Cities Health District (WCCHD) has reported the first human case of West Nile Virus (WNV) neuroinvasive disease in Williamson County for 2020. The person is in their 40s and resides in southern Williamson County.

This season, 12 mosquito trap samples have tested positive for WNV in Williamson County. Additional active positive traps have been reported in the Southwest Williamson County Regional Park/New Hope Drive area in Leander, and a new positive trap site was reported today near the Brushy Creek Community Center, near the intersection of Great Oaks Drive and Racine Trail in Round Rock.

WILCO residents need to remain vigilant about protecting themselves from mosquito bites and to prevent mosquito breeding on their personal property. Mosquitoes breed in standing water, only needing as little as one teaspoon.

How to keep you and your family safe during mosquito season:

  • DRAIN standing water in flowerpots, pet dishes, or clogged gutters so mosquitoes don’t have a place to breed and treat water that can’t be drained.
  • DEFEND by using an EPA-approved insect repellent.
  • DRESS in long sleeves and pants.

For more information, go to the WCCHD website at or visit the Texas Department of State Health Services West Nile website at

Additional traps have tested positive in Georgetown. City of Georgetown, Texas – Government They have sprayed for mosquitoes in the area in the late evening hours Friday, Saturday, and Sunday, Aug. 28-30.

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