2021 WNV Activity by County

(2021-10-28) - Source: http://westnile.ca.gov

Total Positive Counties: 35

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals8820822558813
Alameda-2---
Alpine-----
Amador----1
Butte1328027-
Calaveras-----
Colusa---1-
Contra Costa238--
Del Norte-----
El Dorado1----
Fresno6-219-2
Glenn2----
Humboldt-----
Imperial-----
Inyo-----
Kern3-103--
Kings5-34-1
Lake--44-
Lassen-----
Los Angeles13432583-
Madera3-131--
Marin-----
Mariposa-----
Mendocino-----
Merced5110191
Modoc-----
Mono-----
Monterey-----
Napa--1--
Nevada-2---
Orange2749--
Placer2563--
Plumas-----
Riverside1-108--
Sacramento-10012012
San Benito-----
San Bernardino119--
San Diego2----
San Francisco-----
San Joaquin517389-3
San Luis Obispo2----
San Mateo-----
Santa Barbara-----
Santa Clara-14--
Santa Cruz-----
Shasta3-283-
Sierra-----
Siskiyou-----
Solano2222--
Sonoma-12--
Stanislaus72152-1
Sutter-11811-
Tehama---5-
Trinity-----
Tulare773758-
Tuolumne-----
Ventura-1---
Yolo110564-
Yuba--1222
State Totals8820822558813