2022 WNV Activity by County

(2024-02-26) - Source: http://westnile.ca.gov

Total Positive Counties: 35

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals207189316514516
Alameda1----
Alpine-----
Amador-----
Butte323927-
Calaveras-----
Colusa1--3-
Contra Costa1125-
Del Norte-----
El Dorado-----
Fresno302296--
Glenn1----
Humboldt-----
Imperial--1--
Inyo-----
Kern22-99-3
Kings7-105-1
Lake-273-
Lassen-----
Los Angeles6149578331
Madera32132--
Marin-----
Mariposa-----
Mendocino-----
Merced722016-
Modoc-----
Mono-----
Monterey-----
Napa--1--
Nevada-1--1
Orange9139--
Placer2589--
Plumas-----
Riverside-5125--
Sacramento5404262
San Benito-----
San Bernardino47100--
San Diego3----
San Francisco-----
San Joaquin41208-1
San Luis Obispo----1
San Mateo1----
Santa Barbara-----
Santa Clara12623--
Santa Cruz-----
Shasta11393-
Sierra-----
Siskiyou-----
Solano2912--
Sonoma-1---
Stanislaus15-70-1
Sutter143116-
Tehama3--62
Trinity-----
Tulare1521030103
Tuolumne-----
Ventura-1---
Yolo324654-
Yuba111213-
State Totals207189316514516