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 Angeles-
Madera-
Marin-
Mariposa-
Mendocino-
Merced-
Modoc-
Mono-
Monterey-
Napa-
Nevada-
Orange-
Placer-
Plumas-
Riverside-
Sacramento-
San Benito-
San Bernardino-
San Diego1
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-
Yuba-
Total1

WNV Activity by County
Printable Version
2018 | 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 10, 2019201920185Y AVG
Counties438
Human cases000
Dead birds1412
Mosquito samples417
Sentinel chickens000
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2019 YTD activity -

WNV Reports

Weekly Report

05.17 Arbovirus Bulletin #7
05.17 2019 YTD WNV Activity Map
05.16 2018 YTD WNV Activity Map

Humans

04.03 2018 Human WNV Incidence Report
04.03 2003-2018 WNV Case Summary
03.29 2017 Human WNV Incidence Report

Dead Birds

05.17Positive Counts by City/County for 2019
05.17Positive Species for 2019
05.17Reported, Tested, Positive 2019

Mosquitoes

05.17 AMOR - EVS Week 19
05.17 AMOR - GRAVID Week 19
05.17 AMOR - NJLT Week 19
- view report archives -