Irving mosquitoes tested positive for West Nile virus, according to the Dallas County Health and Social Services Department.
A mosquito trap sample of postal code 75038 has recently been tested positive for the virus. No mosquito spray project has been announced.
DCHHS, however, said it sprays Monday and Tuesday in North Dallas after a mosquito sample tested positive for postal code 75230.
So far this year, no human cases of West Nile virus have been reported in Dallas County.
West Nile virus is a disease transmitted by the bite of an infected mosquito.
Mosquitoes can be infected when they feed on the blood of infected birds. Infected mosquitoes can then transmit WNV to humans and animals. Serious infections with WNV can lead to neurological complications such as encephalitis. Fever, headache and body aches are less serious symptoms. There is no vaccine or specific treatment for WNV.
"The mosquito season has come in. We want the people of Dallas County to know that they are expecting more positive traps this season and that they will remember the 4Ds." said Dr. Philip Huang, director of DCHHS, in a previous statement.