2016 West Nile Virus Activity

 

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: 11

n Date Reported City Cross Streets Species
1 7/11/16 Knightsen Holland Tract Area Cx tarsalis
2 7/18/16 Antioch Cavallo Ave x Wilbur Ave Cx tarsalis
3 8/1/16 Knightsen Holland Tract Area Cx tarsalis
4 8/1/16 Byron Byron Hwy x Rankin Rd Cx tarsalis
5 8/29/16 Bethel Island Stone Rd Cx tarsalis
6 8/29/16 Discovery Bay Byron Tract NW Cx tarsalis
7 9/6/16 Byron Byron Hwy x Rankin Rd Cx tarsalis
8 9/6/16 Brentwood Sycamore Ave x Garin Pkwy Cx tarsalis
9 9/19/16 Knightsen Holland Tract Area Cx tarsalis
10 10/3/16 Byron Byron Hwy x Rankin Rd Cx tarsalis
11 10/24/16 Bethel Island Stone Rd Cx tarsalis

Dead Birds: 33

n Date Reported City Cross Streets Species
1 6/13/16 Antioch Prewett Ranch Dr x Mokelumne Dr American Crow
2 7/11/16 Brentwood Eden Plains Rd x Chestnut St Western Scrub Jay
3 7/12/16 Antioch Marigold Wy x Prewett Ranch Dr American Crow
4 7/13/16 Brentwood Oak St x 2nd St American Crow
5 7/25/16 Oakley Oakley Rd x Trenton St American Crow
6 7/31/16 Blackhawk Deer Meadow Dr x Live Oak Dr American Crow
7 8/1/16 Oakley Big Bear Rd x Bernard Rd Western Scrub Jay
8 8/4/16 Alamo Stone Valley Rd x Alamo Glen Dr American Crow
9 8/7/16 Alamo Camino Sobrante x Orinda Wy American Crow
10 8/8/16 Brentwood Balfour Rd x Fairview Ave American Crow
11 8/9/16 Concord Glazier Dr x Armand Dr American Crow
12 8/9/16 Antioch Lone Tree Wy x Deer Valley Rd Western Scrub Jay
13 8/18/16 Pleasant Hill Geary Rd x Pleasant Hill Rd American Crow
14 8/19/16 Oakley Lakespring Dr x Beaulieu Ln Western Scrub Jay
15 8/23/16 Danville Verona Ave x Love Ln American Crow
16 8/24/16 Concord Treat Blvd x Oak Grove Rd American Crow
17 8/25/16 Concord Michigan Blvd x Washington Blvd American Crow
18 8/30/16 Concord Treat Blvd x Oak Grove Rd American Crow
19 8/31/16 Pleasant Hill Hubbard Ave x Roberta Ave Western Scrub Jay
20 9/7/16 Antioch Taylor Wy x Silveria Wy American Crow
21 9/7/16 Concord Glazier Dr x Mercer Ct American Crow
22 9/8/16 Concord Denkinger Rd x Wilson Ln American Crow
23 9/14/16 Concord Bailey Rd x Clayton Rd California Scrub Jay
24 9/16/16 Walnut Creek Primrose Ln x Peachwillow Ln American Crow
25 9/20/16 Martinez Morello Ave x Morello Hills Dr American Crow
26 9/22/16 Concord Clayton Rd x Bailey Rd American Crow
27 9/28/16 Concord Mendocino Dr x Salem St American Crow
28 10/3/16 Danville Old Farm Rd x Contada Cir American Crow
29 10/4/16 Danville Green Valley Rd x Blemer Rd American Crow
30 10/7/16 Walnut Creek Oak Grove Rd x Peachwillow Ln American Crow
31 10/10/16 Walnut Creek Los Felicias Ave x San Antonio Dr American Crow
32 10/11/16 Walnut Creek Naranja Dr x Walnut Ave American Crow
33 10/11/16 Concord Sunshine Dr x Meadow Ln American Crow

Sentinel Chicken Flocks: 2

Note: Chickens do not die from West Nile virus. They develop antibodies to the virus which is detected in their blood.

#/10 Date Bleed Area
2/10 7/18/16 Oakley
1/10 8/1/16 Holland Tract
2/10 8/15/16 Holland Tract

Horses: 0

n Date Reported City Dead/Euthanized
 
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