2024 WNV Activity by County

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

Total Positive Counties: 42

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals360851451218631
Alameda177154-
Alpine-----
Amador-----
Butte18269331
Calaveras1--3-
Colusa1222-
Contra Costa8952611-
Del Norte-----
El Dorado34---
Fresno201232-2
Glenn4-1--
Humboldt-----
Imperial--3--
Inyo--2--
Kern15-107-2
Kings9-70-1
Lake6826--
Lassen-----
Los Angeles434457630-
Madera91207-1
Marin-2---
Mariposa-----
Mendocino-----
Merced8-43222
Modoc-----
Mono-----
Monterey1----
Napa-47-1
Nevada11-2-
Orange62215-1
Placer643177-1
Plumas-----
Riverside2069182-3
Sacramento3919634273
San Benito-1-6-
San Bernardino2311158-2
San Diego-111--
San Francisco-----
San Joaquin1420607-2
San Luis Obispo21--2
San Mateo214--1
Santa Barbara-----
Santa Clara111818-1
Santa Cruz-----
Shasta621515-
Sierra-----
Siskiyou----1
Solano6182411-
Sonoma1166--
Stanislaus326293-2
Sutter766619-
Tehama---4-
Trinity-----
Tulare145566101
Tuolumne-----
Ventura14---
Yolo276729410-
Yuba5-2671
State Totals360851451218631