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

Case Counts by County

CountyDead birds
Alameda1
Alpine-
Amador-
Butte-
Calaveras-
Colusa1
Contra Costa-
Del Norte-
El Dorado-
Fresno1
Glenn-
Humboldt-
Imperial-
Inyo-
Kern3
Kings-
Lake1
Lassen-
Los Angeles13
Madera-
Marin-
Mariposa-
Mendocino-
Merced-
Modoc-
Mono-
Monterey-
Napa-
Nevada1
Orange7
Placer1
Plumas-
Riverside11
Sacramento21
San Benito-
San Bernardino11
San Diego5
San Francisco-
San Joaquin2
San Luis Obispo-
San Mateo1
Santa Barbara-
Santa Clara-
Santa Cruz1
Shasta-
Sierra-
Siskiyou-
Solano-
Sonoma-
Stanislaus-
Sutter-
Tehama-
Trinity-
Tulare8
Tuolumne-
Ventura-
Yolo-
Yuba-
Total89

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

News

WNV Dead Bird Hotline Update

Dec 23, 2015

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.

Thank you for your report!

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 Jul 21, 2017201720165Y AVG
Counties253231
Human cases404
Dead birds89658456
Mosquito samples8951157766
Sentinel chickens213027
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2016 YTD activity -

WNV Reports

Weekly Report

07.24 Arbovirus Bulletin #16
07.21 2017 YTD WNV Activity Map
07.18 2017 US Arboviral Activity Update

Humans

07.19 2017 Human WNV Incidence Report
07.19 2003-2017 WNV Case Summary
02.08 2016 Human WNV Incidence Report

Dead Birds

07.21Positive Counts by City/County for 2017
07.21Positive Species for 2017
07.21Reported, Tested, Positive 2017

Mosquitoes

07.21 AMOR - EVS Week 28
07.21 AMOR - GRAVID Week 28
07.21 AMOR - NJLT Week 28
- view report archives -