Butte County confirms first human cases of West Nile Virus

Jul 16, 2015 1:25 PM by News Staff

The state's first human cases of West Nile Virus have been confirmed in two residents of Butte County after a routine blood donation.

As of July 15, West Nile activity has been detected in 31 of California's 58 counties, with 152 non-human cases of WNV infection.

Mosquito sampling is done throughout the county by the Butte County Mosquito and Vector Control District and so far this year one dead bird and 15 mosquito samples have tested positive for the virus this year. Infected mosquito pools have been collected in east Gridley, west Gridley, east Biggs, and Biggs.

Eighty percent of people infected with West Nile Virus do not have symptoms. However people 50 year-old and above are more likely to develop serious symptoms if infected.

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