2019 WNV Activity by County

(2021-08-04) - Source: http://westnile.ca.gov

Total Positive Counties: 34

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals225226328813915
Alameda1----
Alpine-----
Amador1----
Butte514434-
Calaveras-----
Colusa1--6-
Contra Costa1112-
Del Norte-----
El Dorado-----
Fresno5110495-2
Glenn--11-
Humboldt-----
Imperial3-2--
Inyo-----
Kern282128-2
Kings3-63--
Lake--6--
Lassen-----
Los Angeles31539428-
Madera3-85-1
Marin-----
Mariposa-----
Mendocino-----
Merced10348161
Modoc-----
Mono-----
Monterey-----
Napa-----
Nevada-----
Orange550208--
Placer13538-
Plumas-----
Riverside125524-1
Sacramento4447441
San Benito---1-
San Bernardino7452-1
San Diego32---
San Francisco-----
San Joaquin75288-1
San Luis Obispo2----
San Mateo-----
Santa Barbara-----
Santa Clara18---
Santa Cruz-----
Shasta-131-
Sierra-----
Siskiyou-----
Solano1-54-
Sonoma-----
Stanislaus164203-2
Sutter1-1511-
Tehama---4-
Trinity-----
Tulare2417814101
Tuolumne-1--1
Ventura22131
Yolo17591-
Yuba-3225-
State Totals225226328813915