Human Cases
Year-to-date: 63 Counties: 20
There were 4 new WNV positive human cases reported in California this week from the following counties: Colusa (1), Fresno (2), and Riverside (1). This is the first WNV positive human case from Colusa County this year.
6 WNV-related fatalities have been reported to CDPH this year from 6 jurisdictions: Butte (1), Contra Costa (1), Fresno (1), Merced (1), Santa Clara (1), Tehama (1).
63 human cases from 20 counties have tested positive for WNV in 2024.
Dead Birds
Year-to-date: 474 Counties: 20
There were 23 new WNV positive dead birds reported in California this week from the following counties: Alameda (2), Los Angeles (2), Madera (1), Merced (1), Sacramento (3), San Mateo (2), and Santa Clara (12). These are the first WNV positive dead birds from Madera and Merced counties this year.
474 dead birds from 20 counties have tested positive for WNV in 2024.
Mosquito Samples
Year-to-date: 1,835 Counties: 25
There were 87 new WNV positive mosquito samples reported in California this week from the following counties: Fresno (6), Imperial (1), Kern (4), Los Angeles (12), Madera (6), Merced (6), Placer (2), San Bernardino (2), San Joaquin (16), Shasta (2), Solano (2), Stanislaus (4), Tulare (22), and Yolo (2).
1,835 mosquito samples from 25 counties have tested positive for WNV in 2024.
A mosquito sample may contain up to 50 individual mosquitoes.
Sentinel Chickens
Year-to-date: 139 Counties: 15
There were 23 new WNV positive sentinel chickens reported in California last week from the following counties: Butte (1), Colusa (2), Los Angeles (12), Sacramento (1), Sutter (2), Tehama (2), and Yolo (3). These are the first WNV positive sentinel chickens from Colusa, Sacramento, and Yolo counties this year.
139 sentinel chickens from 15 counties have tested positive for WNV in 2024.
Horses
Year-to-date: 6 Counties: 6
6 horses from 6 counties have tested positive for WNV in 2024.