2013 WNV Activity by County
Year To Date (Weeks 1 - 34)

(2024-03-29) - Source: http://westnile.ca.gov

Total Positive Counties: 39

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals5983415622318
Alameda-9---
Alpine-----
Amador-----
Butte3342939-
Calaveras-----
Colusa11-8-
Contra Costa246104-
Del Norte-----
El Dorado-----
Fresno2741--
Glenn37169-
Humboldt-1---
Imperial-----
Inyo-----
Kern428521
Kings-1055--
Lake-7462-
Lassen-----
Los Angeles2726425560-
Madera-712--
Marin-4-1-
Mariposa-----
Mendocino-1---
Merced-28711-
Modoc-----
Mono-----
Monterey-----
Napa-1---
Nevada-4---
Orange11611--
Placer1197641
Plumas-----
Riverside21447131
Sacramento311727723
San Benito-----
San Bernardino-1211812-
San Diego-5---
San Francisco-----
San Joaquin32689--
San Luis Obispo--1--
San Mateo-----
Santa Barbara-----
Santa Clara13819--
Santa Cruz-1---
Shasta-2646-
Sierra-----
Siskiyou-----
Solano1615-
Sonoma-8---
Stanislaus197182
Sutter1146030-
Tehama-2-1-
Trinity-1---
Tulare-325--
Tuolumne-1---
Ventura16---
Yolo2701945-
Yuba-7139-
State Totals5983415622318