One of the pools was located along Hickory Street near Oakbrook Park, which is south of Main Street and between 5th Street and Preston Road.
The other pool was located along North County Road near the Warren Sports Complex, which is along North County Road's intersection with Eldorado Parkway.
“In response, staff will be observing these areas more closely,” Environmental Health Supervisor Julie Fernandez said in a statement. “The increased eyes on the situation will help us identify any potential breeding grounds. At that time, we would apply treatment.”
The city shared a list of precautions for West Nile virus promoted by the Texas Department of State Health Services:
• Use approved insect repellents that contain DEET, picaridin or oil of lemon eucalyptus every time you go outside.
• Drain standing water that collects in bird baths, French drains, clogged gutters, saucers under potted plants and “splash blocks” at the end of gutter down spouts.
• Wear long sleeves and pants at dawn and dusk.
• Use air conditioning and make sure doors and windows have intact screens.
The latest positives bring Frisco's total to 12 mosquito pools that have tested positive for West Nile virus this season. No human cases of the virus have been confirmed in Frisco, though Plano officials announced Sept. 2 that a human case had been identified there.
Frisco began testing for mosquitoes May 1.
The city also confirmed the first positive test of a mosquito pool near Oakbrook Park along Hickory Street on May 29.
The Cottonwood Creek Greenbelt area was the location of the second positive test reported on June 5. Frisco then sprayed for mosquitoes in that area July 11-12, July 25-26, Aug. 1-2, Aug. 8-10 and Aug. 29-30 after the fourth through seventh and 10th mosquito pools tested positive for West Nile virus.
The third positive test was confirmed June 22, when city officials said they would be increasing surveillance efforts and treating areas near Whitefish Lake Drive and the Plantation Springs neighborhood. Plantation Springs is located south of Lebanon Road and north of the Sam Rayburn Tollway on Frisco's east side.
Frisco's eighth positive pool was announced Aug. 14 near Copper Point Lane in the Village Lakes neighborhood on the city's west side.
The ninth positive test was reported Aug. 21 near Hickory Creek, which is near the intersection of Hickory Street and Preston Road.
Additional information about Frisco's Mosquito Surveillance and Response Plan is available at www.friscotexas.gov/mosquitoes.