2014 WNV Activity by County
Year To Date (Weeks 1 - 40)

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

Total Positive Counties: 38

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals477225531393830
Alameda190161-
Alpine-----
Amador-----
Butte21224037-
Calaveras-----
Colusa2418-
Contra Costa3422214-
Del Norte-----
El Dorado-5---
Fresno319130--
Glenn10489-
Humboldt-2---
Imperial1----
Inyo-----
Kern63110--
Kings33150--
Lake118685-
Lassen-----
Los Angeles10585285120-
Madera3537--
Marin-53--
Mariposa-----
Mendocino1----
Merced18119-
Modoc-----
Mono-----
Monterey-----
Napa-12---
Nevada-----
Orange171367435--
Placer33976--
Plumas-----
Riverside818530-
Sacramento102894848-
San Benito-----
San Bernardino13179327-
San Diego212---
San Francisco-----
San Joaquin752210--
San Luis Obispo-----
San Mateo-1715--
Santa Barbara-----
Santa Clara7878304-
Santa Cruz-1---
Shasta26339-
Sierra-----
Siskiyou-----
Solano1331123-
Sonoma-2983-
Stanislaus294717012-
Sutter4195229-
Tehama3--13-
Trinity-----
Tulare14403114-
Tuolumne-----
Ventura-5---
Yolo10702219-
Yuba416249-
State Totals477225531393830