Austin Public Health (APH) is investigating a suspected case of West Nile virus in a Travis County resident, pending confirmation from the Texas Department of State Health Services. The individual reportedly showed symptoms consistent with the virus during a recent medical visit.

This alert follows a concerning trend: as of August 4, nine mosquito pools have tested positive for West Nile virus in Travis County this season.

“As we’re spending time outside enjoying the water and the weather, we must take precautions for mosquitoes and the diseases they can carry,” said Dr. Desmar Walkes, Austin-Travis County Health Authority. “Diseases like West Nile virus can cause serious health issues – take a few minutes out of your day to protect yourself and others.”

West Nile virus is the most common mosquito-borne illness in the U.S., transmitted through the bite of an infected mosquito—not through person-to-person contact. About 20% of infected individuals experience symptoms such as headache, body aches, joint pain, vomiting, diarrhea, or rash. In severe cases, the virus can affect the central nervous system, leading to seizures or coma.

Those over 60 and individuals with underlying health conditions—including cancer, diabetes, hypertension, kidney disease, or organ transplants—are at greater risk for serious complications.

In 2024, Travis County recorded 101 positive mosquito pools and 33 confirmed human cases of West Nile virus, including two fatalities.

“All the rain we’ve seen so far this year has created plenty of breeding grounds for mosquitoes,” added Marcel Elizondo, Environmental Health Services Division Chief. “Mosquitoes can breed in as little as a bottle cap full of water—be sure to check your property and clear out any standing water you see.”

Fight the Bite: The Four Ds

• Dusk and Dawn: Mosquitoes carrying West Nile virus are most active during these hours.
• Dress: Wear long sleeves and pants; light-colored, loose-fitting clothing is best.
• DEET: Use EPA-approved insect repellent containing DEET.
• Drain: Eliminate standing water around your home—flowerpots, gutters, birdbaths, and toys can all become breeding grounds.