2009 WNV Activity by County

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

Total Positive Counties: 42

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals112515106344318
Alameda-101--
Alpine-----
Amador-1---
Butte213536-
Calaveras-----
Colusa-2---
Contra Costa54517131
Del Norte-----
El Dorado19---
Fresno1362132171
Glenn-6-3-
Humboldt-----
Imperial--342-
Inyo-----
Kern1928138104-
Kings39105--
Lake-221-
Lassen-----
Los Angeles208299411
Madera11137-
Marin-----
Mariposa-----
Mendocino-----
Merced4911143
Modoc-1---
Mono--1--
Monterey14---
Napa---3-
Nevada-----
Orange41016--
Placer-44011-
Plumas-----
Riverside3227371
Sacramento-283622
San Benito-----
San Bernardino2185414-
San Diego43955-
San Francisco-1---
San Joaquin102483103
San Luis Obispo-1---
San Mateo-1---
Santa Barbara-1---
Santa Clara-1414--
Santa Cruz-1---
Shasta-92-1
Sierra-----
Siskiyou-----
Solano-32131
Sonoma-----
Stanislaus132894252
Sutter--2511-
Tehama---21
Trinity-----
Tulare425131281
Tuolumne-2---
Ventura-3---
Yolo27164-
Yuba1-1--
State Totals112515106344318