human cases

YTD: 79 Counties: 24
There were 24 new WNV human cases reported in California last week from the following counties: Humboldt (1), Kern (2), Madera (2), Placer (7), Riverside (1), San Bernardino (2), San Joaquin (5), and Yolo (4). These are the first WNV human cases from Humboldt, Madera, and Placer counties this year.

4 WNV-related fatalities have been reported to CDPH this year from four local health jurisdictions: Glenn (1), Placer (1), Yolo (1), and Yuba (1) counties.

79 human cases from 24 counties have tested positive for WNV in 2018.

horses

YTD: 6 Counties: 5

6 horses from 5 counties have tested positive for WNV in 2018.

dead birds

YTD: 430 Counties: 18
There were 8 new WNV positive dead birds reported in California last week from the following counties: Alameda (2), Los Angeles (1), Placer (1), Sacramento (3), and Shasta (1).

430 dead birds from 18 counties have tested positive for WNV in 2018.

mosquito samples

YTD: 1,730 Counties: 28
There were 124 new WNV positive mosquito samples reported in California last week from the following counties: Butte (3), Fresno (1), Kern (7), Los Angeles (2), Madera (7), Orange (22), Placer (5), Sacramento (13), San Bernardino (1), San Joaquin (41), Stanislaus (6), Tulare (12), and Yolo (4).

1,730 mosquito samples from 28 counties have tested positive for WNV in 2018.

A mosquito sample may contain up to 50 individual mosquitoes.

sentinel chickens

YTD: 112 Counties: 14
There were 8 new WNV positive sentinel chickens reported in California last week from the following counties: Placer (1), Sacramento (4), Shasta (1), and Yolo (2). This is the first WNV positive sentinel chicken from Sacramento County this year.

112 sentinel chickens from 14 counties have tested positive for WNV in 2018.