The treatment is meant to decrease the mosquito population and minimize the risk of transmission of West Nile Virus.
The Allegheny County Health Department will treat for mosquitoes in several Pittsburgh neighborhoods where they have tested positive for West Nile Virus. Standing water can be treated with EPA-approved larvicides to kill mosquitoes before they become adults.
Mosquitos are collected from over 90 test sites across CT to test for viruses including West Nile, Zika and Eastern Equine Encephalitis.
The health district said mosquito testing, which began in June is expected to continue through the late fall.
Dusk and dawn are when mosquitoes are most active.
The mosquitos get the virus by feeding on infected birds.
There is new evidence of West Nile virus in Perth County. The most common symptoms of the virus are fever, headaches or physical weakness.
Cover up with light-colored clothes, long sleeves and trousers when outdoors or while in areas where mosquito activity is high.
Last year, 26 people contracted the virus and two died in Dallas County.
Use effective insect repellent such as DEET or Picaridin.