2011 WNV Activity by County

(2021-03-02) - Source: http://westnile.ca.gov

Total Positive Counties: 35

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals158688208739115
Alameda-----
Alpine-----
Amador1----
Butte3-120-
Calaveras-----
Colusa-----
Contra Costa3387--
Del Norte-----
El Dorado12---
Fresno915123-5
Glenn12-5-
Humboldt-----
Imperial--33-
Inyo--2--
Kern1843891401
Kings1963--
Lake-13--
Lassen-----
Los Angeles58227467861
Madera235--
Marin-----
Mariposa-----
Mendocino-----
Merced1911153
Modoc-----
Mono-----
Monterey-----
Napa-----
Nevada-1---
Orange104991--
Placer1104862
Plumas-----
Riverside775640-
Sacramento41343817-
San Benito-----
San Bernardino43315042-
San Diego--1--
San Francisco-----
San Joaquin52751--
San Luis Obispo-----
San Mateo-----
Santa Barbara1----
Santa Clara13616--
Santa Cruz1----
Shasta--1--
Sierra-----
Siskiyou-----
Solano-1-1-
Sonoma--2--
Stanislaus11241007-
Sutter-2268-
Tehama11---
Trinity-----
Tulare11428271
Tuolumne-----
Ventura-1---
Yolo-97-2
Yuba3114-
State Totals158688208739115