Vector Disease Control International, a private company contracted by the City of Lewisville, has confirmed the city’s first positive West Nile Virus mosquito trap for 2018. The positive sample came from a trap collected Oct. 18 from the 2600 block of Lake Ridge Drive in Castle Hills, near the location Denton County recorded its first positive mosquito trap in late September.
Ground spraying will be conducted in a half-mile radius of the testing location starting at 9 p.m. Oct. 23. Due to weather conditions, rain on Wednesday and nighttime temperatures below 50 degrees Fahrenheit, crews will only be able to spray one night. The lower temperatures and rain in the forecast should assist in lowering the adult mosquito population.
There is currently no vaccine or medication to treat the West Nile virus in humans, according to the Center for Disease Control. Though most people infected with the virus never so much as show symptoms, about one in five infected people develop a fever, and about one in 150 suffer serious complications related to brain inflammation, which can be fatal. The CDC recommends long sleeved shirts and pants and Environmental Protection Agency-registered insect repellents to avoid mosquito bites.
This is the third year the City of Lewisville has worked with Vector Disease Control International. The private company has its own certified lab and technicians. By using a private company, Lewisville is able to receive test results faster than if tested by the state. The insecticide being used is registered with the Environmental Protection Agency and poses minimal risk to humans and the environment.
City crews are regularly walking through and visually inspecting creeks and drainage channels to look for potential mosquito breeding sites. The city has nearly a dozen workers in the Parks and Animal Services divisions who are state-certified to apply anti-larval dunks or localized pesticide to curb the mosquito population. Residents are encouraged to report any mosquito complaints to health and animal services manager Chris McGinn at 972-219-3484.