human cases

YTD: 11 Counties: 7
There were 5 new WNV positive human cases reported in California this week from the following counties: Fresno (1), Los Angeles (3), and San Diego (1). These are the first WNV positive human cases from Fresno, Los Angeles, and San Diego counties this year. There have been 0 WNV-related fatalities reported in California this year. 11 human cases from 7 counties have tested positive for WNV in 2008.

horses

YTD: 3 Counties: 3
There was 1 new WNV positive horse reported in California this week from Fresno County. This is the first WNV positive horse from Fresno County this year. There has been 1 WNV-related horse euthanized or died in California this year from Riverside county. 3 horses from 3 counties have tested positive for WNV in 2008.

dead birds

YTD: 557 Counties: 26
There were 122 new WNV positive dead birds reported in California this week from the following counties: Butte (4), Contra Costa (5), Kern (1), Los Angeles (17), Monterey (1), Orange (21), Riverside (4), Sacramento (17), San Bernardino (8), San Diego (27), San Joaquin (10), Solano (1), Stanislaus (2), Tulare (1), Ventura (2), and Yolo (1). This is the first WNV positive dead bird from Yolo County this year. 557 dead birds from 26 counties have tested positive for WNV in 2008.

mosquito samples

YTD: 292 Counties: 19
There were 137 new WNV positive mosquito samples reported in California last week from the following counties: Contra Costa (3), Fresno (5), Los Angeles (11), Orange (48), Placer (1), Riverside (13), Sacramento (13), San Bernardino (18), San Diego (3), San Joaquin (10), Stanislaus (2), Sutter (5), Tulare (3), Yolo (1), and Yuba (1). This is the first indication of WNV from Placer, Yolo, and Yuba counties this year. 292 mosquito samples from 19 counties have tested positive for WNV in 2008.

sentinel chickens

YTD: 8 Counties: 5
There have been 2 new WNV positive sentinel chickens reported in California last week from San Diego (2) counties. This is the first WNV positive sentinel chicken from San Diego County this year. 8 sentinel chickens from 5 counties have tested positive for WNV in 2008.

squirrels

YTD: 3 Counties: 2
There have been 2 new WNV positive squirrels reported in California last week from Contra Costa (2) counties. This is the first WNV positive squirrel from Contra Costa County this year. 3 squirrels from 2 counties have tested positive for WNV in 2008.

As of July 22, 2008, 43 human cases had been reported nationwide this year in the following 14 states: Alabama (1), Arizona (1), Arkansas (2), California (6), Colorado (2), Connecticut (1), Louisiana (2), Mississippi (9), North Dakota (5), Oklahoma (3), South Dakota (3), Tennessee (1), Texas (6), and Utah (1). Of the 43 individuals, 16 (37%) had neuroinvasive illness. No cases have resulted in fatalities. At this time last year, 122 human cases had been reported nationwide.