Officials will go door-to-door in parts of Brownsville, asking residents to take voluntary urine tests to detect any trace of the Zika virus.

Cameron County Health Authority Dr. James Castillo announced the move Monday, following the news that 43-year-old Brownsville woman had contracted the Zika virus.

According to the Texas Department of State Health Services:

The Texas Department of State Health Services and Cameron County Department of Health and Human Services today announced the first case of Zika virus disease likely transmitted by a mosquito in Texas. DSHS is supporting Cameron County’s response to the case and to the ongoing risk of Zika in the community.
The patient is a Cameron County resident who is not pregnant and who was confirmed last week by lab test to have been infected. She reported no recent travel to Mexico or anywhere else with ongoing Zika virus transmission and no other risk factors. Laboratory testing found genetic material from the Zika virus in the patient’s urine, but a blood test was negative, indicating that the virus can no longer be spread from her by a mosquito. There are no other cases of suspected local transmission at this time, but health officials continue to conduct disease surveillance activities as part of the state’s ongoing Zika response.

The woman hadn’t visited Mexico or any other country where the virus is prevalent, Castillo said.

The woman reported joint pain and a fever, Castillo said. When a lab analyzed her urine, traces of the Zika virus were detected.

Officials will go door-to-door between East 14th Street and International Boulevard and between Taft Street and Garfield Street, asking residents for urine samples.