A half-dozen non-native Aedes aegypti mosquitoes have been detected in East San Jose, according to the county. The insect is invasive and has been known to spread diseases such as dengue, Zika and yellow fever. 

The vector control district said there is no need for residents to relocate during the treatment, but people can close windows and stay inside to minimize exposure to the insecticide

Residents will not have to relocate during the treatment, which officials said poses minimal risk to people, pets, animals and the environment.

Santa Clara County will chemically fog parts of San Jose after some mosquitoes tested positive for West Nile Virus.

Mosquitoes found in Campbell, Los Gatos, Monte Sereno and San Jose tested positive for West Nile Virus, county officials warned Monday.