2014 WNV Activity by County

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

Total Positive Counties: 40

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals801244233404430
Alameda196161-
Alpine-----
Amador-----
Butte24224037-
Calaveras-----
Colusa3419-
Contra Costa5442515-
Del Norte-----
El Dorado-7---
Fresno439138--
Glenn10489-
Humboldt-2---
Imperial1----
Inyo-----
Kern113111--
Kings43150--
Lake118715-
Lassen-----
Los Angeles25399356146-
Madera3537--
Marin-63--
Mariposa-----
Mendocino1----
Merced181111-
Modoc-----
Mono-----
Monterey-----
Napa-12---
Nevada---2-
Orange263431499--
Placer74077--
Plumas-----
Riverside1419143-
Sacramento1029448710-
San Benito-----
San Bernardino21179732-
San Diego113912-
San Francisco-----
San Joaquin953239--
San Luis Obispo-----
San Mateo-2115--
Santa Barbara-2---
Santa Clara10925305-
Santa Cruz-1---
Shasta263312-
Sierra-----
Siskiyou-----
Solano5331123-
Sonoma-3793-
Stanislaus334717612-
Sutter8195231-
Tehama4--13-
Trinity-----
Tulare21403114-
Tuolumne-----
Ventura17---
Yolo15712219-
Yuba616249-
State Totals801244233404430