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

Case Counts by County

CountyDead birds
Alameda19
Alpine-
Amador-
Butte4
Calaveras-
Colusa-
Contra Costa13
Del Norte-
El Dorado2
Fresno-
Glenn-
Humboldt1
Imperial-
Inyo-
Kern1
Kings-
Lake-
Lassen-
Los Angeles19
Madera-
Marin-
Mariposa-
Mendocino-
Merced-
Modoc-
Mono-
Monterey-
Napa-
Nevada-
Orange12
Placer44
Plumas-
Riverside6
Sacramento241
San Benito-
San Bernardino-
San Diego-
San Francisco-
San Joaquin16
San Luis Obispo-
San Mateo5
Santa Barbara-
Santa Clara53
Santa Cruz2
Shasta5
Sierra-
Siskiyou-
Solano-
Sonoma-
Stanislaus1
Sutter4
Tehama-
Trinity-
Tulare-
Tuolumne1
Ventura-
Yolo41
Yuba-
Total490

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 Oct 19, 2018201820175Y AVG
Counties394441
Human cases143360406
Dead birds4904741308
Mosquito samples195233043137
Sentinel chickens152296376
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2018 YTD activity -

WNV Reports

Weekly Report

10.19 Arbovirus Bulletin #29
10.19 2018 YTD SLEV Activity Map
10.19 2018 YTD WNV Activity Map

Humans

10.18 2018 Human WNV Incidence Report
10.18 2003-2018 WNV Case Summary
03.29 2017 Human WNV Incidence Report

Dead Birds

10.19Reported, Tested, Positive 2018
10.19Positive Species for 2018
10.19Positive Counts by City/County for 2018

Mosquitoes

10.19 AMOR - EVS Week 41
10.19 AMOR - GRAVID Week 41
10.19 AMOR - NJLT Week 41
- view report archives -