Human Cases
Year-to-date: 0 Counties:
No human cases have tested positive for WNV in 2024.
Dead Birds
Year-to-date: 94 Counties: 10
There were 10 new WNV positive dead birds reported in California last week from the following counties: Sacramento (2), San Bernardino (1), and Santa Clara (7).
94 dead birds from 10 counties have tested positive for WNV in 2024.
Mosquito Samples
Year-to-date: 320 Counties: 20
There were 51 new WNV positive mosquito samples reported in California last week from the following counties: Fresno (16), Los Angeles (2), Madera (1), Placer (1), Riverside (16), Sacramento (1), San Joaquin (7), Shasta (1), Stanislaus (1), Tulare (1), Yolo (2), and Yuba (2). This is the first indication of WNV from Madera, Placer, and Shasta counties this year.
320 mosquito samples from 20 counties have tested positive for WNV in 2024.
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 2024.
Horses
Year-to-date: 0 Counties:
No horses have tested positive for WNV in 2024.