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

Case Counts by County

CountyDead birds
Alameda7
Alpine-
Amador-
Butte15
Calaveras-
Colusa-
Contra Costa15
Del Norte-
El Dorado1
Fresno4
Glenn4
Humboldt-
Imperial-
Inyo-
Kern-
Kings3
Lake3
Lassen-
Los Angeles76
Madera5
Marin4
Mariposa-
Mendocino-
Merced5
Modoc-
Mono-
Monterey-
Napa-
Nevada2
Orange34
Placer18
Plumas-
Riverside11
Sacramento390
San Benito-
San Bernardino3
San Diego222
San Francisco-
San Joaquin29
San Luis Obispo-
San Mateo10
Santa Barbara-
Santa Clara66
Santa Cruz2
Shasta1
Sierra-
Siskiyou-
Solano4
Sonoma1
Stanislaus8
Sutter7
Tehama-
Trinity-
Tulare2
Tuolumne-
Ventura20
Yolo62
Yuba3
Total1037

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

Resources

West Nile Virus Information for Physicians

Aug 3, 2012

West Nile virus (WNV) has been detected in many regions of the state. Physicians should:


  • Be aware if WNV is active in their area
  • Look for symptoms of WNV
  • Test for WNV because testing:

    • differentiates WNV from other conditions (enterovirus, other arboviral diseases) and thus may prompt a change in treatment regime
    • results offer anticipatory guidance--both WNV neuroinvasive disease and WN fever patients can have lingering symptoms and knowing the underlying etiology is helpful for the patient and family members
    • helps mosquito control and public health agencies institute proper control measures to reduce the risk of further cases in the event of a positive result

  • Contact their local public health department for details on sample submission and testing


For additional information, please see these resources:

Having problems with mosquitoes?

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

As of Aug 24, 2016201620155Y AVG
Counties363934
Human cases467749
Dead birds1037586816
Mosquito samples256217681468
Sentinel chickens161150128
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2015 YTD activity -

WNV Reports

Weekly Report

08.24 2016 YTD WNV Activity Map
08.22 Arbovirus Bulletin #24
08.16 2016 US Arboviral Activity Update

Humans

08.17 2016 Human WNV Incidence Report
08.17 2003-2016 WNV Case Summary
03.21 2015 Human WNV Incidence Report

Dead Birds

08.24Positive Species for 2016
08.24Reported, Tested, Positive 2016
08.24Positive Counts by City/County for 2016

Mosquitoes

08.19 AMOR - EVS Week 32
08.19 AMOR - GRAVID Week 32
08.19 AMOR - NJLT Week 32
- view report archives -