Case Counts by County

CountyDead birds
Alameda-
Alpine-
Amador-
Butte-
Calaveras-
Colusa-
Contra Costa-
Del Norte-
El Dorado-
Fresno-
Glenn-
Humboldt-
Imperial-
Inyo-
Kern-
Kings-
Lake-
Lassen-
Los Angeles1
Madera-
Marin-
Mariposa-
Mendocino-
Merced-
Modoc-
Mono-
Monterey-
Napa-
Nevada-
Orange-
Placer-
Plumas-
Riverside-
Sacramento-
San Benito-
San Bernardino-
San Diego-
San Francisco-
San Joaquin-
San Luis Obispo-
San Mateo-
Santa Barbara-
Santa Clara-
Santa Cruz-
Shasta-
Sierra-
Siskiyou-
Solano-
Sonoma-
Stanislaus-
Sutter-
Tehama-
Trinity-
Tulare-
Tuolumne-
Ventura-
Yolo-
Yuba1
Total2

WNV Activity by County
Printable Version
2013 | 2012 | 2011 | 2010
2009 | 2008 | 2007

News

Don't Let The Summer Heat Make You Mosquito Meat!

Jun 8, 2009

Summer is the time when the risk of being bitten by a mosquito carrying West Nile virus (WNV) increases, both outside and inside the home.

Mosquitoes that carry WNV are most active at dawn and dusk, and into the early evening hours. Keep mosquito repellent handy so that each family member remembers to apply it before venturing outside at these times. Use EPA-registered mosquito repellents containing one of the following:

  • DEET
  • Picaridin
  • Oil of lemon eucalyptus
  • IR3535
And don't forget about your protecting yourself and your family inside your home! Make sure each door and window has a screen without rips, tears, or holes. Even a small rip can allow WNV-carrying mosquitoes to enter your home and bite you.

Following these simple suggestions will help you avoid mosquito bites and let you enjoy the wonderful California summer!

Locate Your Local Mosquito and Vector Control Agency
Search by Zip Code

Compared to 2012 YTD

As of May 24, 201320122013
Counties95
Human cases00
Horses00
Dead birds162
Mosquito samples89
Sentinel chickens00
Squirrels00
2012 YTD - Year to date corresponds to the same time last year.

- view all 2012 YTD activity -

WNV Reports

Weekly Report

05.24 Arbovirus Bulletin #12
05.24 2013 YTD WNV Activity Map
05.20 Arbovirus Bulletin #11

Humans

04.26 2012 Human WNV Case Linelist
04.26 2003-2012 WNV Case Summary
03.18 2012 Human WNV Incidence Report

Dead Birds

05.24Positive Species for 2013
05.24Positive Counts by City/County for 2013
05.24Reported, Tested, Positive 2013 YTD

Mosquitoes

05.24 AMOR - EVS Week 20
05.24 AMOR - GRAVID Week 20
05.24 AMOR - NJLT Week 20

Horses

12.16 2010 Equine WNV Result Map
12.16 2010 Confirmed Equine Cases Report
05.26 2009 Equine WNV Result Map
- view report archives -