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West Nile Virus
Bird
2011
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West Nile Virus:  California - Bird
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Siskiyou County Del Norte County Modoc County Humboldt County Trinity County Lassen County Shasta County Humboldt County Tehama County (1) Plumas County Butte County Mendocino County Glenn County (2) Sierra County Yuba County (1) Lake County (1) Nevada County (1) Colusa County Placer County (10) Sutter County (2) El Dorado County (2) Alpine County Yolo County (9) Napa County Sonoma County Sacramento County (134) Mono County Amador County Solano County (1) Calaveras County Tuolumne County Marin County San Joaquin County (27) Solano County (1) Solano County (1) Contra Costa County (38) Solano County (1) Stanislaus County (24) Sacramento County (134) Contra Costa County (38) Alameda County Mariposa County Marin County San Francisco County San Francisco County Alameda County San Francisco County Madera County (3) San Francisco County San Francisco County San Francisco County San Mateo County San Francisco County San Francisco County Merced County (9) Fresno County (15) Santa Clara County (35) Inyo County Santa Cruz County San Benito County Monterey County Tulare County (42) Kings County (9) San Bernardino County (33) San Luis Obispo County Kern County (4) Santa Barbara County Ventura County (1) Los Angeles County (227) Riverside County (7) Santa Barbara County Santa Barbara County Santa Barbara County Santa Barbara County Ventura County (1) Ventura County (1) Ventura County (1) Orange County (50) Los Angeles County (227) San Diego County Santa Barbara County Los Angeles County (227) Imperial County Ventura County (1) Los Angeles County (227) Los Angeles County (227) San Diego County 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 2011 Data as of 3 am, Apr 17, 2012*
These data are considered the final 2011 data as of April 17,2012.
[Epi curve - Vertical bar graph showing number of incidents for each of 52 weeks]
Cumulative Dead Bird Infections by Local Jurisdiction - California, 2011
Contra Costa County38
El Dorado County2
Fresno County15
Glenn County2
Kern County4
Kings County9
Lake County1
Los Angeles County227
Madera County3
Merced County9
Nevada County1
Orange County50
Placer County10
Riverside County7
Sacramento County134
San Bernardino County33
San Joaquin County27
Santa Clara County35
Solano County1
Stanislaus County24
Sutter County2
Tehama County1
Tulare County42
Ventura County1
Yolo County9
Yuba County1
Cumulative Total Entire State: 688
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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.