First West Nile Positive Mosquito Sample Confirmed This Season


Edrea Au
Sr. Public Information Officer
Tarrant County Public Health

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Tarrant County Public Health Confirms First West Nile Positive Mosquito 

May 14, 2024 - (Tarrant County) - Tarrant County Public Health (TCPH) has confirmed a West Nile Virus (WNV) positive mosquito sample, the first of the 2024 season. No human cases have been reported in 2024. The positive sample was collected in the City of Arlington. West Nile Virus season typically runs from April through mid-November. Local cities and Tarrant County for unincorporated areas may perform mosquito treatment as needed.

To date, during the current season, 910 mosquito samples have been tested at TCPH’s North Texas Regional Laboratory.

Last season, TCPH reported its first WNV positive mosquito sample on April 26, 2023.

TCPH reminds residents to take measures to safeguard against WNV. Residents should dump standing water on their property, use EPA-approved repellent, and whenever possible, dress in long pants and long sleeves.


  • Mosquitoes need water to breed. When practical, please dump ALL standing water.
  • Infected mosquitoes can transmit WNV to people after feeding on infected birds.
  • Apply larvicides directly to water sources that may hold mosquito larvae.
    • Larvicides are products used to eliminate mosquitoes before they become adults.        

For more information about West Nile Virus our Vector Control webpage.

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News release date: May 14, 2024