2014 WNV Activity by County
Year To Date (Weeks 1 - 39)

(2024-03-28) - Source: http://westnile.ca.gov

Total Positive Counties: 38

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals422215830473620
Alameda189161-
Alpine-----
Amador-----
Butte20203836-
Calaveras-----
Colusa2418-
Contra Costa2412213-
Del Norte-----
El Dorado-5---
Fresno319128--
Glenn9488-
Humboldt-2---
Imperial1----
Inyo-----
Kern63110--
Kings23148--
Lake118685-
Lassen-----
Los Angeles8970266114-
Madera3537--
Marin-53--
Mariposa-----
Mendocino1----
Merced17119-
Modoc-----
Mono-----
Monterey-----
Napa-12---
Nevada-----
Orange155326412--
Placer33976--
Plumas-----
Riverside517429-
Sacramento102854768-
San Benito-----
San Bernardino11159123-
San Diego27---
San Francisco-----
San Joaquin550208--
San Luis Obispo-----
San Mateo-1613--
Santa Barbara-----
Santa Clara6863304-
Santa Cruz-1---
Shasta26339-
Sierra-----
Siskiyou-----
Solano1331119-
Sonoma-2662-
Stanislaus264515512-
Sutter2195227-
Tehama3--13-
Trinity-----
Tulare13403114-
Tuolumne-----
Ventura-5---
Yolo5682199-
Yuba416249-
State Totals422215830473620