Human Cases
Year-to-date: 229 Counties: 26
There were 37 new WNV positive human cases reported in California this week from the following counties: Contra Costa (1), Imperial (1), Kern (1), Lake (2), Los Angeles (20), Orange (1), Riverside (2), Sacramento (5), San Bernardino (1), San Joaquin (1), Tulare (1), and Yolo (1). These are the first WNV positive human cases from Imperial and Lake counties this year.
11 WNV-related fatalities have been reported to CDPH this year from Los Angeles (7), Merced (2), Orange (1), and Sacramento (1) counties.
229 human cases from 26 counties have tested positive for WNV in 2020.
Dead Birds
Year-to-date: 343 Counties: 21
There was 1 new WNV positive dead bird reported in California last week from Orange County.
343 dead birds from 21 counties have tested positive for WNV in 2020.
Mosquito Samples
Year-to-date: 2,628 Counties: 28
2,628 mosquito samples from 28 counties have tested positive for WNV in 2020.
A mosquito sample may contain up to 50 individual mosquitoes.
Sentinel Chickens
Year-to-date: 144 Counties: 17
144 sentinel chickens from 17 counties have tested positive for WNV in 2020.
Horses
Year-to-date: 20 Counties: 13
20 horses from 13 counties have tested positive for WNV in 2020.