Tarrant County Public Health announced April 24 that the first case of West Nile virus has been confirmed in the county for the 2020 season.

The positive sample was collected in unincorporated territory in northwest Tarrant County, according to officials. Health officials were expected to do a “ground spraying” treatment of the area April 24-25.

According to TCPH figures, the county has collected and tested 188 mosquito samples since beginning West Nile virus seasonal surveillance April 1.

Public health officials are reminding residents to safeguard against the virus by dumping standing water, using mosquito repellent, and dressing in long sleeves and pants whenever possible.

In 2019, Tarrant County officials confirmed the county’s first positive West Nile virus mosquito on June 14.


Able to be transmitted year-round, West Nile virus is primarily a seasonal epidemic during summer months, according to officials. The virus is most commonly spread via mosquito bite, and symptoms can appear anywhere from two to 14 days after a bite.

For more information on West Nile virus in Tarrant County, click here.