Human Cases
Year-to-date: 89 Counties: 22
There were 6 new WNV positive human cases reported in California this week from the following counties: Contra Costa (1), Kern (2), and Los Angeles (3).
10 WNV-related fatalities have been reported to CDPH this year from 10 jurisdictions: Butte (1), Contra Costa (1), Fresno (1), Glenn (1), Kern (1), Los Angeles (1), Merced (1), Riverside (1), Santa Clara (1), Tehama (1)
89 human cases from 22 counties have tested positive for WNV in 2023.
Dead Birds
Year-to-date: 505 Counties: 21
There were 11 new WNV positive dead birds reported in California this week from the following counties: Los Angeles (1), Placer (1), Riverside (1), San Mateo (3), and Santa Clara (5).
505 dead birds from 21 counties have tested positive for WNV in 2023.
Mosquito Samples
Year-to-date: 1,990 Counties: 25
There were 28 new WNV positive mosquito samples reported in California this week from the following counties: Fresno (1), Kern (1), Los Angeles (12), Merced (1), Orange (3), Tulare (9), and Yolo (1).
1,990 mosquito samples from 25 counties have tested positive for WNV in 2023.
A mosquito sample may contain up to 50 individual mosquitoes.
Sentinel Chickens
Year-to-date: 155 Counties: 16
There have been 2 new WNV positive sentinel chickens reported in California this week from Los Angeles (1) and Solano (1) counties.
155 sentinel chickens from 16 counties have tested positive for WNV in 2023.
Horses
Year-to-date: 7 Counties: 7
There was 1 new WNV positive horse reported in California last week from Tehama County. This is the first WNV positive horse from Tehama County this year.
7 horses from 7 counties have tested positive for WNV in 2023.