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West Nile Virus
Human
2009
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West Nile Virus:  California - Human
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Siskiyou County Del Norte County Modoc County Humboldt County Trinity County Lassen County Shasta County Humboldt County Tehama County Plumas County Butte County (2) Mendocino County Glenn County Sierra County Yuba County (1) Lake County Nevada County Colusa County Placer County Sutter County El Dorado County (1) Alpine County Yolo County (2) Napa County Sonoma County Sacramento County Mono County Amador County Solano County Calaveras County Tuolumne County Marin County San Joaquin County (10) Solano County Solano County Contra Costa County (5) Solano County Stanislaus County (14) Sacramento County Contra Costa County (5) Alameda County Mariposa County Marin County San Francisco County San Francisco County Alameda County San Francisco County Madera County (1) San Francisco County San Francisco County San Francisco County San Mateo County San Francisco County San Francisco County Merced County (4) Fresno County (13) Santa Clara County Inyo County Santa Cruz County San Benito County Monterey County (1) Tulare County (4) Kings County (3) San Bernardino County (2) San Luis Obispo County Kern County (18) Santa Barbara County Ventura County Los Angeles County (20) Riverside County (3) Santa Barbara County Santa Barbara County Santa Barbara County Santa Barbara County Ventura County Ventura County Ventura County Orange County (4) Los Angeles County (20) San Diego County (4) Santa Barbara County Los Angeles County (20) Imperial County Ventura County Los Angeles County (20) Los Angeles County (20) San Diego County (4) Navigate to Arizona page Navigate to Idaho page Navigate to Nevada page Navigate to Oregon page Navigate to Utah page Navigate to Wyoming page
Map Scalebar 350 km
Cumulative 2009 Data as of 3 am, May 04, 2010*
These data are provisional and may be revised or adjusted in the future.
[Epi curve - Vertical bar graph showing number of incidents for each of 52 weeks]
Epi curve graph
Cumulative Human Disease Cases by County - California, 2009
Butte County2
Contra Costa County5
El Dorado County1
Fresno County13
Kern County18
Kings County3
Los Angeles County20
Madera County1
Merced County4
Monterey County1
Orange County4
Riverside County3
San Bernardino County2
San Diego County4
San Joaquin County10
Stanislaus County14
Tulare County4
Yolo County2
Yuba County1
Cumulative Total Entire State: 112
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Map Legend
* States and counties in yellow either did not perform surveillance or did not report any positive test results from their surveillance.