2017 WNV Activity by County

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

Total Positive Counties: 47

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals553510337130521
Alameda12---
Alpine-----
Amador-----
Butte454731-
Calaveras---1-
Colusa-1---
Contra Costa419971
Del Norte-----
El Dorado-2---
Fresno135167-1
Glenn-21212
Humboldt-1---
Imperial3----
Inyo4-9--
Kern303152-2
Kings5179--
Lake-5172-
Lassen----3
Los Angeles2771015821451
Madera2162--
Marin-1---
Mariposa-----
Mendocino-----
Merced1014019-
Modoc-----
Mono-----
Monterey-1---
Napa-----
Nevada-1---
Orange3357280--
Placer-4595-
Plumas----1
Riverside3241196-4
Sacramento68615321
San Benito---1-
San Bernardino574529536-
San Diego2439-1
San Francisco11---
San Joaquin147242-2
San Luis Obispo-6---
San Mateo-1---
Santa Barbara-114-
Santa Clara-15---
Santa Cruz-1---
Shasta12-4-
Sierra-----
Siskiyou-----
Solano14911-
Sonoma-51--
Stanislaus286196--
Sutter331622-
Tehama2--41
Trinity-----
Tulare128630--
Tuolumne----1
Ventura123--
Yolo614872-
Yuba16188-
State Totals553510337130521