Case Counts by County

CountyDead birds
Alameda12
Alpine-
Amador-
Butte33
Calaveras-
Colusa3
Contra Costa4
Del Norte-
El Dorado2
Fresno1
Glenn4
Humboldt2
Imperial-
Inyo-
Kern1
Kings3
Lake5
Lassen-
Los Angeles12
Madera1
Marin3
Mariposa-
Mendocino-
Merced1
Modoc-
Mono-
Monterey-
Napa5
Nevada9
Orange25
Placer8
Plumas-
Riverside39
Sacramento62
San Benito-
San Bernardino4
San Diego107
San Francisco-
San Joaquin11
San Luis Obispo-
San Mateo8
Santa Barbara-
Santa Clara83
Santa Cruz-
Shasta10
Sierra-
Siskiyou-
Solano7
Sonoma4
Stanislaus13
Sutter16
Tehama-
Trinity2
Tulare22
Tuolumne-
Ventura6
Yolo48
Yuba6
Total582

WNV Activity by County
Printable Version
2015 | 2014 | 2013
2012 | 2011 | 2010
2009 | 2008 | 2007
All media inquiries, including requests for interviews, should be directed to the California Department of Public Health, Office of Public Affairs at 916-440-7259 or via email at CDPHPress@cdph.ca.gov.

News

Reporting a Dead Bird Video
WNV Dead Bird Hotline Update
CDPH Reports First Human West Nile Virus Case This Summer
Climate Change May Mean More Mosquitoes -- And Diseases
Mosquito Control Matters video (MVCAC)
CDPH Reports First Human West Nile Virus Case of 2011
WNV in CA 2011
CDPH REPORTS FIRST HUMAN WEST NILE VIRUS FATALITY OF 2010
CDPH REPORTS FIRST HUMAN WEST NILE VIRUS CASES OF 2010
At the Twilight's Last Gleam - Be Sure Repellent is on Your TEAM!
Summer is right around the corner
Don't Let The Summer Heat Make You Mosquito Meat!
Winter Rain Means Dump and Drain
Gov. Schwarzenegger Declares State of Emergency in Counties Hit Hardest by West Nile Virus
Rise in Cases of West Nile May Portend an Epidemic (NY Times)
West Nile Virus Activity Increases in California

Press Releases

CDPH Confirms First Human West Nile Virus Death of 2015
West Nile Virus Activity Increases Throughout California
California Sets Record for West Nile Virus Activity
West Nile Virus at Highest Level Ever in Mosquitoes
CDPH Reports First Human West Nile Virus Fatalities This Summer
CDPH Reports First Human West Nile Virus Infections This Season
First California Fatality from West Nile Virus in 2012
CDPH Reports First Human West Nile Virus Case of 2012
First Two California Fatalities From West Nile Virus in 2011
CDPH REPORTS FIRST CONFIRMED HUMAN WEST NILE VIRUS FATALITIES OF 2009
CALIFORNIA DEPARTMENT OF PUBLIC HEALTH ANNOUNCES FIRST DEATH FROM WEST NILE VIRUS IN 2008
First Confirmed Case of West Nile Virus in Horses for 2008
CALIFORNIA DEPARTMENT OF PUBLIC HEALTH ANNOUNCES FIRST CONFIRMED HUMAN WEST NILE VIRUS CASE IN 2008
CALIFORNIA DEPARTMENT OF PUBLIC HEALTH REMINDS CALIFORNIANS TO PROTECT THEMSELVES FROM MOSQUITOES THAT CARRY WNV
Governor Schwarzenegger Orders Enhancements to Fight West Nile Virus
Gov. Schwarzenegger Deploys Additional Resources to Fight West Nile Virus in Wetland Wildlife Areas
Gov. Schwarzenegger Announces Additional Emergency Funding to Fight West Nile Virus, Totals More Than $1.3 Million This Week
Gov. Schwarzenegger Announces Release of Emergency Funding to Fight West Nile Virus
CALIFORNIA DEPARTMENT OF PUBLIC HEALTH ANNOUNCES FIFTH DEATH THIS YEAR DUE TO WEST NILE VIRUS
CALIFORNIA DEPARTMENT OF PUBLIC HEALTH ANNOUNCES THIRD AND FOURTH DEATHS DUE TO WEST NILE VIRUS
CALIFORNIA DEPARTMENT OF PUBLIC HEALTH ANNOUNCES SECOND DEATH FROM WEST NILE VIRUS IN 2007
OFICIAL ESTATAL DE SALUD ANUNCIA LA PRIMER MUERTE EN CALIFORNIA A CONSECUENCIA DEL VIRUS DEL NILO OCCIDENTAL
CALIFORNIA DEPARTMENT OF PUBLIC HEALTH ANNOUNCES FIRST DEATH FROM WEST NILE VIRUS IN 2007
STATE HEALTH OFFICER ANNOUNCES FIRST CONFIRMED HUMAN CASE OF WEST NILE VIRUS IN CALIFORNIA THIS YEAR
EARLY ONSET OF WARM WEATHER TRIGGERS AN EARLY WEST NILE VIRUS SEASON

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Compared to previous year and previous five-year average to date

As of Aug 28, 2015201520145Y AVG
Counties403632
Human cases8312554
Dead birds5821573751
Mosquito samples207324841702
Sentinel chickens174184151
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2014 YTD activity -

WNV Reports

Weekly Report

09.01 2015 US Arboviral Activity Update
08.31 2015 YTD WNV Activity Map
08.28 Arbovirus Bulletin #26

Humans

08.28 2015 Human WNV Incidence Report
08.28 2003-2015 WNV Case Summary
03.09 2014 Human WNV Incidence Report

Dead Birds

08.31Positive Species for 2015
08.31Positive Counts by City/County for 2015
08.31Reported, Tested, Positive 2015

Mosquitoes

08.28 AMOR - EVS Week 33
08.28 AMOR - GRAVID Week 33
08.28 AMOR - NJLT Week 33
- view report archives -