From The Sacramento Bee
August 15, 2017
The first human case this year of West Nile virus in Northern California was reported by Butte County health officials Tuesday.
The virus was identified by a blood donation center while it was performing regular screening on blood samples Friday. The donated blood was discarded, and the person in whose blood the virus was found has been notified, said Lisa Almaguer, a Butte County Public Health Department spokeswoman.
Almaguer said she could not disclose the location of the blood donation center or the city where the human case was found. Statewide, 22 cases of West Nile virus have been reported this year, mostly in Kern, Kings, Los Angeles and San Bernardino counties.
The Butte County Mosquito and Vector Control District said it is not notified of the locations of human cases until people show symptoms, District Manager Matt Ball said.