West Nile virus turned up Wednesday in mosquitoes trapped near Eagle Road and State Street, Ada County officials announced.
Infected mosquitoes were recently discovered in Canyon and Gem counties, but this is the first discovery in Ada County. Infected mosquitoes were also reported Wednesday in the Cambridge area of Washington County.
The Ada County mosquitoes that tested positive for the virus were found in a trap just east of Eagle Road, near the intersection of State Street and Idaho 55.
"Given this discovery, Ada County Mosquito Abatement will implement their usual response of ground fogging tonight for adult mosquitoes in the area, and will follow that with ground larviciding tomorrow morning," a county news release announced.
The county announced Tuesday it will begin aerial spraying for mosquitoes this week, but the infected trap is located just outside of the aerial spray zone. Spraying will likely begin in that zone Thursday, the county reported.
The county's news release also included a statement that proper application of aerial spray will not harm bees, and the abatement district will use the smallest recommended application amount.