2022 WNV Activity by County

(2022-12-09) - Source: http://westnile.ca.gov

Total Positive Counties: 34

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals155186316514516
Alameda-----
Alpine-----
Amador-----
Butte323927-
Calaveras-----
Colusa1--3-
Contra Costa1125-
Del Norte-----
El Dorado-----
Fresno262296--
Glenn1----
Humboldt-----
Imperial--1--
Inyo-----
Kern21-99-3
Kings7-105-1
Lake-273-
Lassen-----
Los Angeles2547578331
Madera32132--
Marin-----
Mariposa-----
Mendocino-----
Merced712016-
Modoc-----
Mono-----
Monterey-----
Napa--1--
Nevada-1--1
Orange9139--
Placer2589--
Plumas-----
Riverside-5125--
Sacramento4404262
San Benito-----
San Bernardino-7100--
San Diego1----
San Francisco-----
San Joaquin41208-1
San Luis Obispo----1
San Mateo1----
Santa Barbara-----
Santa Clara12623--
Santa Cruz-----
Shasta11393-
Sierra-----
Siskiyou-----
Solano3912--
Sonoma11---
Stanislaus15-70-1
Sutter143116-
Tehama3--62
Trinity-----
Tulare1021030103
Tuolumne-----
Ventura-1---
Yolo324654-
Yuba111213-
State Totals155186316514516