2012 WNV Activity by County

(2021-08-04) - Source: http://westnile.ca.gov

Total Positive Counties: 42

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals4791644284954022
Alameda215---
Alpine-----
Amador-----
Butte105327451
Calaveras----1
Colusa35-6-
Contra Costa466197-
Del Norte-----
El Dorado-5---
Fresno2425147-3
Glenn716481
Humboldt-----
Imperial1-410-
Inyo-----
Kern2514571742
Kings32102--
Lake110234-
Lassen-----
Los Angeles163271339135-
Madera3214-1
Marin-1---
Mariposa-----
Mendocino-6---
Merced13424141
Modoc-----
Mono-----
Monterey1----
Napa-11--
Nevada-3---
Orange429269--
Placer12601088-
Plumas-----
Riverside19513363-
Sacramento30466487362
San Benito-----
San Bernardino32395845-
San Diego11---
San Francisco11---
San Joaquin1358169-2
San Luis Obispo-1---
San Mateo-5---
Santa Barbara-----
Santa Clara-203--
Santa Cruz-1---
Shasta1361765
Sierra-----
Siskiyou-----
Solano22832-
Sonoma-831-
Stanislaus265121081
Sutter8291938-
Tehama45---
Trinity-----
Tulare75414411-
Tuolumne-----
Ventura73822-
Yolo109815441
Yuba41115131
State Totals4791644284954022