2016 WNV Activity by County
Year To Date (Weeks 1 - 41)

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

Total Positive Counties: 38

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals326132534483240
Alameda-112--
Alpine-----
Amador-----
Butte21224838-
Calaveras-----
Colusa2--9-
Contra Costa133105-
Del Norte-----
El Dorado14---
Fresno96184--
Glenn541110-
Humboldt-----
Imperial--1--
Inyo-----
Kern12-80--
Kings34118--
Lake14395-
Lassen-----
Los Angeles114117414114-
Madera55100--
Marin-5---
Mariposa-----
Mendocino-----
Merced-51333-
Modoc-----
Mono-----
Monterey1----
Napa-14--
Nevada-2-1-
Orange2383416--
Placer5301037-
Plumas-----
Riverside41632--
Sacramento214114552-
San Benito-----
San Bernardino757920-
San Diego13258759-
San Francisco-----
San Joaquin737350--
San Luis Obispo-----
San Mateo-135--
Santa Barbara-----
Santa Clara18713--
Santa Cruz-23--
Shasta13123-
Sierra-----
Siskiyou-----
Solano3131610-
Sonoma-82--
Stanislaus2114258--
Sutter10106833-
Tehama5--8-
Trinity-----
Tulare73260--
Tuolumne-----
Ventura233---
Yolo12722594-
Yuba941813-
State Totals326132534483240