Denton County's West Nile Count Hits Six — Four of Them the Severe Form

FloMoBee covered this in August, when the county had two cases. Six weeks later: six.

Denton County Public Health confirmed the sixth human West Nile case of 2026 on Tuesday, October 13. The newest patient, a Denton resident, has the neuroinvasive form of the disease. That makes four people this season who contracted the potentially fatal neuroinvasive form of the virus.

The season's geography matters if you live here. Earlier this summer, the county scheduled ground fogging in areas south of Argyle after a positive mosquito trap was flagged there. Southern Denton County has been inside this story all along.

Here's what the case count means in plain terms. Fewer than 1% of West Nile infections produce the neuroinvasive form — and when that severe, central-nervous-system form does take hold, the CDC puts the fatality rate at roughly 10%. Most people who get infected — roughly four in five — never develop any symptoms at all. About 1 in 5 people infected will develop symptoms, per CDC data. The odds are genuinely low for most people. The risk is real, though, for residents over 50 and those with compromised immune systems.

The county's chief epidemiologist put it plainly: "Even though temperatures are decreasing, preventing mosquito-borne illnesses remains a priority," said Juan Rodriguez, DCPH chief epidemiologist and assistant director.

October isn't a free pass. Mosquitoes in North Texas remain active through fall as long as temperatures stay mild.

What actually works. No vaccine exists for West Nile virus, and once infected, patients have no cure available to them. Not getting bitten is the entire strategy. The county recommends:

• Eliminate standing water on your property or in your neighborhood.
• Wear insect repellent containing DEET, picaridin, or oil of lemon eucalyptus.
• Avoid outdoor activity at dusk and dawn, when mosquitoes feed most actively, and wear long sleeves and pants.
• Use Bti briquettes — sold as mosquito dunks — to treat standing water that's too large to drain.

The county maintains an interactive map of mosquito traps that have tested positive for West Nile virus at dentoncounty.gov/WNV, alongside current case counts and guidance. If you're spending time outdoors this week — in the yard, at a park, on a trail — spray before you go out.