By Susy Solis, CBS 11 News

MANSFIELD (CBSDFW.COM)- Mansfield began targeted ground spraying for the first time this season Sunday night.

The city received its first positive test from a mosquito trap in early August.

So far seven human cases of West Nile virus have been identified by the Tarrant County Health Department.

The increasing number of human cases and number of mosquito traps testing positive for West Nile virus prompted the city to begin ground spraying.

“We are doing it three consecutive evenings, which is what the CDC recommends for maximum effectiveness,” said Howard Redfearn, the stormwater manager for the city of Mansfield.

For residents, like Diane Rhodes, ground spraying is welcome.

“I always smell like bug spray now! But that’s okay, I’d rather do that than get bitten by a mosquito,” she said as she walked her dog, Lulu. “I think spraying is a good idea. I still think people need to take their own precautions.”

Five neighborhoods in which human cases or positive mosquito traps have been identified will be sprayed.

Two trucks rolled out in Mansfield at 9 p.m. and began spraying.

Spraying will continue Monday and Tuesday, August 27-28, at the same time, weather permitting.

Crews will cover 60 linear miles of Mansfield by 5 a.m.

Following spraying, residents are encouraged to use water to clean off patio furniture and other outdoor items