CA Dept. of Public Health UC Davis Arbovirus Research and Training Mosquito and Vector Control Assoc. of CA

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-
Orange1
Placer-
Plumas-
Riverside-
Sacramento4
San Benito-
San Bernardino-
San Diego1
San Francisco-
San Joaquin-
San Luis Obispo-
San Mateo1
Santa Barbara-
Santa Clara-
Santa Cruz-
Shasta-
Sierra-
Siskiyou-
Solano-
Sonoma-
Stanislaus-
Sutter-
Tehama-
Trinity-
Tulare-
Tuolumne-
Ventura-
Yolo-
Yuba-
Total8

WNV Activity by County
Printable Version
2017 | 2016 | 2015 | 2014
2013 | 2012 | 2011
2010 | 2009 | 2008
2007

News

Winter Rain Means Dump and Drain

Feb 27, 2009

Winter is a good time to dump and drain standing water around your home to help reduce the places where mosquitoes carrying West Nile virus breed. Places to check for standing water include planters, containers, children's toys, and debris filled rain gutters.

And don't forget about that swimming pool! Neglected pools are prime breeding places for mosquitoes. If you are unable to properly maintain your swimming pool or know of one that is not maintained, call your local mosquito and vector control agency for assistance. Remember dumping and draining standing water on a regular basis is an easy and effective way to help protect you and your family from West Nile virus. Fight the bite!

Having problems with mosquitoes?

Locate your local mosquito and vector control agency
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Compared to previous year and previous five-year average to date

As of May 26, 2017201720165Y AVG
Counties91110
Human cases100
Dead birds85331
Mosquito samples122720
Sentinel chickens000
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2016 YTD activity -

WNV Reports

Weekly Report

05.26 Arbovirus Bulletin #8
05.26 2017 YTD WNV Activity Map
05.19 Arbovirus Bulletin #7

Humans

02.08 2016 Human WNV Incidence Report
02.08 2003-2016 WNV Case Summary
03.21 2015 Human WNV Incidence Report

Dead Birds

05.26Positive Counts by City/County for 2017
05.26Positive Species for 2017
05.26Reported, Tested, Positive 2017

Mosquitoes

05.26 AMOR - EVS Week 20
05.26 AMOR - GRAVID Week 20
05.26 AMOR - NJLT Week 20
- view report archives -