west nile virus california

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West Nile virus, California

Highest number of West Nile cases in a day reported in these California counties

West Nile virus activity is on the rise in some northern California counties, according to the Sacramento-Yolo Mosquito and Vector Control District. Three dead birds and 13 mosquito samples tested positive for the virus on Aug. 13, “the highest number of positive results reported in a single day this year,” the agency said in a news release.

Modesto Bee · 2d

First human West Nile virus infection confirmed in Northern California

· 2d · on MSN

Butte County confirms first human case of West Nile virus in 2025

2don MSN

West Nile virus-infected crow found in East Bay

A crow from Walnut Creek has tested positive for West Nile virus (WNV) in Contra Costa County, confirmed the Contra Costa ...

14h

American crow with West Nile Virus infection found in Walnut Creek

An American crow in Walnut Creek was found to be the second bird infected with West Nile Virus, according to the Contra Costa ...

Local News Matters on MSN15d

Officials urge precautions as West Nile virus detected in East Contra Costa mosquitoes

More signs of West Nile virus have cropped up this summer in Contra Costa County, this time in Knightsen, officials said. A group of mosquitoes collected from a trap in Knightsen, a community in ...

Action News Now3d

First human case of West Nile Virus confirmed in Butte County

West Nile Virus infections generally fall into three categories. Eight in 10 people are asymptomatic, one in 5 experience mild to moderate symptoms, and less than 1 in 150 develop ...

4don MSN

No need to panic, but West Nile threat very real, Manitoba health expert says

Health experts say a confirmed case of West Nile Virus is connected to someone who travelled outside of Manitoba, but that ...

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