Human Cases
Year-to-date: 425 Counties: 34
There were 65 new WNV positive human cases reported in California this week from the following counties: Contra Costa (2), Fresno (2), Kern (1), Los Angeles (19), Sacramento (12), San Bernardino (3), San Joaquin (1), San Mateo (1), Stanislaus (1), Tulare (11), and Yolo (12).
19 WNV-related fatalities have been reported to CDPH this year from 12 jurisdictions: El Dorado (1), Fresno (1), Kern (1), Lake (1), Los Angeles (4), Placer (1), Sacramento (2), San Bernardino (2), San Joaquin (1), Stanislaus (1), Tulare (1), Yolo (3).
425 human cases from 34 counties have tested positive for WNV in 2023.
Dead Birds
Year-to-date: 857 Counties: 31
There were 6 new WNV positive dead birds reported in California this week from the following counties: Alameda (3), and San Diego (3).
857 dead birds from 31 counties have tested positive for WNV in 2023.
Mosquito Samples
Year-to-date: 4,522 Counties: 31
There were 10 new WNV positive mosquito samples reported in California this week from the following counties: Alameda (3), Los Angeles (4), and Orange (3).
4,522 mosquito samples from 31 counties have tested positive for WNV in 2023.
A mosquito sample may contain up to 50 individual mosquitoes.
Sentinel Chickens
Year-to-date: 186 Counties: 17
186 sentinel chickens from 17 counties have tested positive for WNV in 2023.
Horses
Year-to-date: 31 Counties: 20
31 horses from 20 counties have tested positive for WNV in 2023.