2009 WNV Activity by County

(2018-12-15) - Source: http://www.westnile.ca.gov

Total Positive Counties: 42

CountyHuman CasesHorsesDead BirdsMosquito SamplesSentinel Chickens
State Totals112185151063443
Alameda--101-
Alpine-----
Amador--1--
Butte2-13536
Calaveras-----
Colusa--2--
Contra Costa51451713
Del Norte-----
El Dorado1-9--
Fresno1316213217
Glenn--6-3
Humboldt-----
Imperial---342
Inyo-----
Kern19-28138104
Kings3-9105-
Lake--221
Lassen-----
Los Angeles201829941
Madera1-1137
Marin-----
Mariposa-----
Mendocino-----
Merced4391114
Modoc--1--
Mono---1-
Monterey1-4--
Napa----3
Nevada-----
Orange4-1016-
Placer--44011
Plumas-----
Riverside3122737
Sacramento-228362
San Benito-----
San Bernardino2-185414
San Diego4-3955
San Francisco--1--
San Joaquin103248310
San Luis Obispo--1--
San Mateo--1--
Santa Barbara--1--
Santa Clara--1414-
Santa Cruz--1--
Shasta-192-
Sierra-----
Siskiyou-----
Solano-13213
Sonoma-----
Stanislaus132289425
Sutter---2511
Tehama-1--2
Trinity-----
Tulare412513128
Tuolumne--2--
Ventura--3--
Yolo2-7164
Yuba1--1-
State Totals112185151063443