West Nile Virus

The Culex quinquefasciatus, or Southern house mosquito, can transmit West Nile virus. Photo courtesy of Texas A&M AgriLife.

The Culex quinquefasciatus, or Southern house mosquito, can transmit West Nile virus. Photo courtesy of Texas A&M AgriLife.

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Williamson County sees first West Nile case

Nalani Nuylan
Monday, July 14, 2025
The Williamson County and Cities Health District has confirmed the first human case of West Nile Virus, July 3.According to the health district, the individual is a resident in their 40s living in southern Williamson County.
This map shows where mosquito control spray was sprayed on July 12 and 13 to prevent more West Nile virus positive mosquitoes. (Courtesy Williamson County and Cities Health District)

This map shows where mosquito control spray was sprayed on July 12 and 13 to prevent more West Nile virus positive mosquitoes. (Courtesy Williamson County and Cities Health District)

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Second West Nile mosquito found at Pinnacle Park

Kaitlyn Wilkes
Tuesday, July 16, 2024
Another mosquito trap near Pinnacle Park in southeast Georgetown returned a positive result on July 3 for West Nile virus.
Texas counties reporting mosquito virus activity, week 26 of the 2024 season. Illustration courtesy of the Texas Department of Human Health Services.

Texas counties reporting mosquito virus activity, week 26 of the 2024 season. Illustration courtesy of the Texas Department of Human Health Services.

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West Nile mosquitoes detected in Williamson County

Kaitlyn Wilkes
Monday, July 8, 2024
The Williamson County Cities and Health District has notified the City of Georgetown and Taylor that mosquito trap samples have tested positive for West Nile Virus.

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Health District prepares for mosquito season

Nalani Nuylan
Wednesday, May 1, 2024
One year removed from an active mosquito season with dozens of West Nile virus mosquitoes reported, Williamson County and Cities Health District is informing the public about precautions that could reduce mosquito bites.
Williamson County Cities Health District building in Round Rock. Sun Archive.

Williamson County Cities Health District building in Round Rock. Sun Archive.

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Two mosquitoes test positive for West Nile in Cedar Park

Nalani Nuylan
Thursday, August 3, 2023
In an update from the Williamson County Cities Health District Integrated Vector Management program, two mosquitoes test positive for West Nile Virus in Cedar Park earlier this week.
Williamson County and Cities Health District building in Round Rock. Photo by Nalani Nuylan.

Williamson County and Cities Health District building in Round Rock. Photo by Nalani Nuylan.

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West Nile virus mosquito detected in Granger

Nalani Nuylan
Monday, July 31, 2023
A sample of mosquitoes was collected near Colorado Street in Granger on July 25 has tested positive for West Nile virus. The positive test was indicated in lab results received on July 27 from the Texas Department of State Health Services lab in Austin.
Jason Fritz, Williamson County City Health District Integrated Vector Management Program lead, assembles a mosquito trap. Photo by Nalani Nuylan.

Jason Fritz, Williamson County City Health District Integrated Vector Management Program lead, assembles a mosquito trap. Photo by Nalani Nuylan.

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Williamson County vector program tracking West Nile cases

Nalani Nuylan
Friday, July 28, 2023
Summer is a season of sunny days and family vacations. A time when Texas barbecue junkies show off their brisket recipe in a smoker. Kids spend their days at local pools, and using slip and slides and kiddie pools in the backyard, enjoying the refreshing water.

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West Nile mosquito found in Jarrell, seventh case this year

Nalani Nuylan
Monday, July 24, 2023
A mosquito trap tested positive for West Nile virus in Jarrell, Friday July 21. The positive test was confirmed in lab results from the Texas Department of State Health Services lab in Austin.  The positive sample was collected from a trap site near the community pool on Sonterra Boulevard.
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