human cases

YTD: 0 Counties: 0
One individual in Los Angeles County has tested positive for West Nile virus in 2009. This individual donated blood and testing performed at the blood bank was positive for WNV. The individual has not developed any symptoms so does not meet the case definition for West Nile virus illness. No cases of human WNV illness have been reported positive for WNV in 2009.

horses

YTD: 0 Counties: 0
No horses have tested positive for WNV in 2009.

dead birds

YTD: 88 Counties: 15
There were 26 new WNV positive dead birds reported in California this week from the following counties: Alameda (5), Fresno (8), Kern (4), Kings (2), Los Angeles (3), Madera (1), Riverside (1), Sacramento (1), and San Bernardino (1). These are the first WNV positive dead birds from Riverside and Sacramento counties this year. This is the first indication of WNV from Alameda and San Bernardino counties this year. 88 dead birds from 15 counties have tested positive for WNV in 2009.

mosquito samples

YTD: 81 Counties: 11
There were 13 new WNV positive mosquito samples reported in California last week from the following counties: Fresno (8), Kern (2), Madera (1), Sacramento (1), and San Joaquin (1). These are the first WNV positive mosquito samples from Madera and San Joaquin counties this year. This is the first indication of WNV from Sacramento County this year. 81 mosquito samples from 11 counties have tested positive for WNV in 2009.

sentinel chickens

YTD: 3 Counties: 1

3 sentinel chickens from 1 county have tested positive for WNV in 2009.

squirrels

YTD: 1 Counties: 1
1 squirrel from 1 county has tested positive for WNV in 2009.