SACRAMENTO - West Nile virus cases in Sacramento County reached 150 Friday, up from 135 on Tuesday.
Sacramento County remains the epicenter for the disease in California, even as the rate of transmission of the virus has slowed the past two weeks.
Statewide, the caseload jumped to 663 from 618. After Sacramento County, Riverside County logged the next highest number of cases, at 73; Stanislaus County had the third-highest number, with 69.
Health officials caution that the region still has infectious mosquitoes, and that mosquito breeding will continue until the first cold rain of the season.