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

Case Counts by County

CountyDead birds
Alameda20
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-
Orange17
Placer44
Plumas-
Riverside6
Sacramento241
San Benito-
San Bernardino-
San Diego1
San Francisco-
San Joaquin16
San Luis Obispo-
San Mateo5
Santa Barbara-
Santa Clara56
Santa Cruz2
Shasta5
Sierra-
Siskiyou-
Solano-
Sonoma-
Stanislaus1
Sutter4
Tehama-
Trinity-
Tulare-
Tuolumne1
Ventura-
Yolo41
Yuba-
Total500

WNV Activity by County
Printable Version
2018 | 2017 | 2016 | 2015 | 2014
2013 | 2012 | 2011
2010 | 2009 | 2008
2007

News

West Nile virus and Dead Bird Hotline

Oct 12, 2018

The West Nile virus and Dead Bird Hotline is staffed with live operators from mid-April to mid-October each year. During the winter months, you can still report a dead bird by using the report form on this website:

Report a Dead Bird

Although West Nile virus testing is reduced in the winter, some local vector control districts are collecting and testing birds year-round, especially crows, ravens, and magpies.

Having problems with mosquitoes?

Locate your local mosquito and vector control agency
Search by Zip Code








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

As of Dec 14, 2018201820175Y AVG
Counties414442
Human cases203501559
Dead birds5005061378
Mosquito samples196333713217
Sentinel chickens163305405
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2018 YTD activity -

WNV Reports

Weekly Report

12.18 2018 YTD WNV Activity Map
12.14 Arbovirus Bulletin #35
12.14 2018 YTD SLEV Activity Map

Humans

12.13 2018 Human WNV Incidence Report
12.13 2003-2018 WNV Case Summary
03.29 2017 Human WNV Incidence Report

Dead Birds

12.14Reported, Tested, Positive 2018
12.14Positive Species for 2018
12.14Positive Counts by City/County for 2018

Mosquitoes

11.09 AMOR - EVS Week 44
11.09 AMOR - GRAVID Week 44
11.09 AMOR - NJLT Week 44
- view report archives -