This map details mosquitoes, dead birds, chickens, and horses that have tested positive for West Nile virus. You can zoom in and out of the map and click on the placemarkers to get a detailed description of the date the positive activity was confirmed and the approximate location.
For information regarding human cases, please click here.
Mosquito Samples: 1
n
Date Collected
City
Cross Streets
Species
1
10/28/19
Martinez
I-680 x Waterfront Rd
Culex tarsalis
Dead Birds: 1
n
Date Reported
City
Cross Streets
Species
1
9/3/19
Danville
Tweed Drive x Old Orchard Drive
American Crow
Sentinel Chicken Flocks: 1
#/10
Date Bleed
Area
1
8/26/19
Holland Tract
1
9/23/19
Holland Tract
Note: Chickens do not die from West Nile virus. They develop antibodies to the virus which is detected in their blood.
Horses: 0
n
Date Reported
City
Dead/Euthanized
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Contra Costa Mosquito And Vector Control District is fully committed to providing accessible facilities, elements and
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