Human Cases
Year-to-date: 107 Counties: 23
There were 9 new WNV positive human cases reported in California last week from the following counties: Fresno (2), Los Angeles (6), and Merced (1).
11 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 (2), Merced (1), Riverside (1), Santa Clara (1), Tehama (1).
107 human cases from 23 counties have tested positive for WNV in 2024.
Dead Birds
Year-to-date: 521 Counties: 21
There were 14 new WNV positive dead birds reported in California last week from the following counties: San Diego (1), and Santa Clara (13).
521 dead birds from 21 counties have tested positive for WNV in 2024.
Mosquito Samples
Year-to-date: 1,998 Counties: 25
There were 2 new WNV positive mosquito samples reported in California last week from Los Angeles County.
1,998 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: 158 Counties: 16
There was 1 new WNV positive sentinel chicken reported in California last week from Alameda County.
158 sentinel chickens from 16 counties have tested positive for WNV in 2024.
Horses
Year-to-date: 7 Counties: 7
7 horses from 7 counties have tested positive for WNV in 2024.