NAMPA, Idaho (AP) -- Health officials in Canyon County say some mosquitoes trapped in recent days have tested positive for the West Nile virus.
The positive results are the first for Canyon County since 2009.
The results also mean county workers intend to step up spraying and abatement programs, specifically at the Deer Flat National Wildlife Refuge where the mosquitoes carrying the virus were trapped.
Canyon now joins Ada as two Idaho counties that have tested positive for the virus this summer. So far, health officials say they have no reports of human cases of West Nile.
Idaho led the nation in West Nile cases in 2006, with about 1,000 infections reported and 23 deaths. Last year, there were just three reported cases in humans, and no deaths.