Mosquitoes in Addison have tested positive for West Nile virus, according to the Dallas County Health and Human Services Department.
A sampling of mosquito traps in the 75254 ZIP code recently tested positive for the virus.
Last month, the first mosquito sample to test positive for West Nile in Richardson. Last week, county health officials said tests were positive for the virus in Richardson, Highland Park and Mesquite.
The county has not announced any plans to spray for mosquitoes.
The West Nile Virus is a disease spread by the bite of an infected mosquito.
Mosquitoes can become infected when they feed on the blood from infected birds. The infected mosquitoes can then transmit WNV to humans and animals. Severe WNV infections can cause neurologic complications such as encephalitis. Milder symptoms include fever, headache and muscle aches. There is no vaccine or specific treatment for WNV.
"Mosquito season is here. We want the residents of Dallas County to know to expect more positive traps this season and to therefore remember the 4 Ds." said Dr. Philip Huang, DCHHS director, in a previous statement.