The Sacramento-Yolo Mosquito and Vector Control District in Califor announced on October 12, 2021, that the invasive mosquito Aedes aegypti had been found within the City of Sacramento.
Invasive mosquitoes are a public health threat because they can transmit debilitating diseases, including Zika, dengue, and chikungunya.
The detection occurred when a single female mosquito was caught by a trap set near Camelia Park in south Sacramento as part of the District’s ongoing surveillance program.
The following day, traps were set in the vicinity, leading to additional findings of invasive mosquitoes.
Aedes aegypti mosquitoes have also been detected in Orangevale, Elk Grove, Arden-Arcade in Sacramento County, and the City of Winters in Yolo County.
“Finding these mosquitoes in a completely new area likely means they could be established anywhere. Therefore, we will continue to work diligently looking for and identifying locations where these mosquitoes could be breeding,” stated Gary Goodman, District Manager.
Aedes aegypti are not native to California; however, they are now permanently established in many areas throughout the State.
“We are at the peak of the season for detecting invasive mosquitoes when they are very active,” added Goodman.
Invasive mosquitoes were first discovered within District boundaries in 2019 in Citrus Heights.
In response to the new detection site, the District will enhance surveillance efforts by setting up additional traps in surrounding neighborhoods to determine the scope of the infestation.
In southern California, Aedes mosquitoes have been found in Los Angeles County.
But have not found any mosquitoes infected with the Zika virus.
To date, all cases of Zika in Los Angeles County acquired their infection when traveling outside of California. Information on the number of Zika cases detected in Los Angeles County is available at this link.