An American crow from Walnut Creek is the second bird to test positive for West Nile virus, the Contra Costa Mosquito and Vector Control District said Friday.

West Nile virus activity is on the rise in some northern California counties, according to the Sacramento-Yolo Mosquito and ...

Vanderburgh County has joined the list of local Indiana communities reporting the West Nile virus in mosquitoes.

Iowa officials have confirmed the state's first case of West Nile virus this year, prompting health warnings about mosquito activity.

Northern California’s first human West Nile virus case of the year has been confirmed in Butte County, according to local ...

Orange County health officials have confirmed the season’s first pool of mosquitoes carrying West Nile Virus, prompting renewed warnings for residents to take precautions against bites and mosquito ...

ANDERSON — The West Nile virus has been detected in mosquitoes in Madison County. Stephanie Mellinger, administrator with the Madison County Health Department, said mosquitoes tested positive ...

What is West Nile virus? West Nile is a mosquito-borne illness that belongs to a group of viruses called flaviviruses, according to the CDC.

Cases of West Nile virus are spreading nationwide, with deaths reported in Colorado and Arizona. What about Florida?

The Southern Nevada Health District said on Tuesday it has ollected its first sample of West Nile virus-positive mosquitoes this year.