Feeling ill and weak, shaken with tremors and running a fever, one Lewisville resident discovered that he contracted the West Nile virus.

Patrick Waring, 77, who lives in the Valley Vista neighborhood, was diagnosed with West Nile fever Aug. 19 after a month of feeling ill.

Vector Disease Control will spray around 9 p.m. Sept. 5 and 6 within a half-mile radius near the intersection of S. Valley Parkway and W. Corporate Drive.

The spraying, which is weather permitting, will be conducted next Tuesday and Wednesday so as not to spray those celebrating Labor Day weekend outside, Health and Animal Services manager Chris McGinn said.

Those residing in the affected areas will be notified by email and phone call if they are registered with Lewisville’s Emergency Notification System.

Assistant Director of Denton County Public Health Juan Rodriguez stressed in a press release that residents can continue to reduce their risk of acquiring West Nile.

“Individuals can help prevent mosquito bites by draining standing water around their homes, dressing appropriately and using DEET or other EPA-approved repellents,” he said.

The City of Lewisville suggested residents take precautions to reduce the risk of getting West Nile virus while outdoors:

  • Drain standing water around your home to reduce mosquito breeding grounds. Scrub any containers that have collected water to ensure eggs, which can survive dry conditions, are not still attached.
  • Consider using BTI briquettes, or mosquito dunks, in water that cannot be drained, such as small ponds and drinking troughs.
  • Be aware of mosquitoes during times they are active: dawn, daytime, dusk and evening hours.
  • Apply an insect repellent that contains DEET to exposed skin and clothing when outdoors.
  • Dress in pants and long sleeves when outside and/or wear permethrin-treated clothing.

The state of Texas requires doctors to report cases of West Nile to the county, McGinn said, then the county epidemiologist reports it to the city the patient’s address falls in.

McGinn estimated it takes about three to four days for the information to reach the city. 

The epidemiologic curve of the West Nile activity in Texas compares week-to-week positive pools for the years 2015, 2016 and 2017. (Screengrab of the 2017 report from the Texas Department of State Health Services)

“Basically our protocol is, if we do have a human-confirmed case, we would spray about a half-mile radius around that individual’s home or wherever they’re spending most of their time,” McGinn said. “Denton County will call us directly and then our response will be based off of that.”

Waring said he does what he can to prevent mosquito bites by using repellant with DEET, but he frequently works outdoors with swimming pools.

The second human case for Denton County this year was reported Aug. 16 in an unincorporated area east of Lewisville. Lewisville reported its 19th West Nile-positive mosquito trap Monday, with spraying to commence Tuesday and Wednesday.

Positive West Nile-mosquito test pools are declining as the season continues, according to the Texas Department of State Health Services. By the weekend of Aug. 18, there were more than 40 positive pools in the state. The previous week, there were just under 120 positive pools collected.

Report any mosquito complaints to Chris McGinn at 972-219-3483. For more information on how to protect yourself against mosquitos, go to the article below.

Editor’s note: The original story has been supplemented with information from the City of Lewisville.

City offers tips for mosquito season