Human Cases
Year-to-date: 2 Counties: 2
There was 1 new WNV positive human case reported in California last week from Stanislaus County. This is the first WNV positive human case from Stanislaus County this year.
1 WNV-related fatalities have been reported to CDPH this year from 1 jurisdictions: Tulare (1)
2 human cases from 2 counties have tested positive for WNV in 2023.
Dead Birds
Year-to-date: 42 Counties: 8
There were 16 new WNV positive dead birds reported in California last week from the following counties: Fresno (1), Sacramento (4), San Diego (4), and Santa Clara (7). This is the first WNV positive dead bird from Sacramento County this year.
42 dead birds from 8 counties have tested positive for WNV in 2023.
Mosquito Samples
Year-to-date: 539 Counties: 19
There were 142 new WNV positive mosquito samples reported in California last week from the following counties: Fresno (4), Kern (4), Kings (2), Los Angeles (3), Madera (20), Merced (1), Placer (14), Sacramento (3), San Diego (26), San Joaquin (2), Shasta (1), Stanislaus (15), Sutter (1), Tulare (45), and Yuba (1). This is the first indication of WNV from Los Angeles, Shasta, Sutter, and Yuba counties this year.
539 mosquito samples from 19 counties have tested positive for WNV in 2023.
A mosquito sample may contain up to 50 individual mosquitoes.
Sentinel Chickens
Year-to-date: 0 Counties:
No sentinel chickens have tested positive for WNV in 2023.
Horses
Year-to-date: 0 Counties:
No horses have tested positive for WNV in 2023.