Crews spray after West Nile found in Evanston mosquitoes

July 26, 2011 8:00:52 PM PDT
Crews were out spraying along Chicago's North Shore Tuesday night after mosquitoes tested positive for the West Nile virus in Evanston.

They started around 8 p.m. in suburbs including Winnetka, Evanston and west suburban Cicero.

Health officials say spraying for insects is necessary because a hot summer could increase mosquito activity.

Crews sprayed along the North Shore until 2 a.m.