2018 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: 17
| n | Date Collected | City | Cross Streets | Species |
|---|---|---|---|---|
| 1 | 7/11/18 | Discovery Bay | Cherry Hills Drive x Hwy 4 | Culex pipiens |
| 2 | 7/16/18 | Agricultural Area East of Brentwood | Orwood Road x Levee Road | Culex tarsalis |
| 3 | 7/30/18 | Discovery Bay | Marina Rd x Willow Lake Rd | Culex pipiens |
| 4 | 8/1//18 | Oakley | E. Summer Lake Dr x Cypress Rd | Culex tarsalis |
| 5 | 8/8/18 | Discovery Bay | Willow Lake Rd x Discovery Bay Blvd | Culex pipiens |
| 6 | 8/13/18 | Holland Tract Area | Holland Tract | Culex tarsalis |
| 7 | 8/13/18 | Martinez | Waterfront Rd Mococo Rd | Culex tarsalis |
| 8 | 8/9/18 | Oakley | Blue Lake Ct x Clear Lake Dr | Culex pipiens |
| 9 | 8/15/18 | Discovery Bay | Bixler Rd x Point of Timber Rd | Culex tarsalis |
| 10 | 8/15/18 | Quimby Island | Quimby Island | Culex tarsalis |
| 11 | 8/20/18 | Discovery Bay | Cherry Hills Dr. x Hwy 4 | Culex pipiens |
| 12 | 8/20/18 | Byron | Rankin Rd x Western Farms Ranch Rd | Culex tarsalis |
| 13 | 8/22/18 | Brentwood | Fertado Ln x Ellisa Ln. | Culex pipiens |
| 14 | 8/29/18 | Quimby Island | Quimby Island | Culex tarsalis |
| 15 | 8/29/18 | Brentwood | Eden Plains Rd x Arabian Ln | Culex pipiens |
| 16 | 9/11/18 | Quimby Island | Quimby Island | Culex tarsalis |
| 17 | 9/17/18 | Bethel Island | Stone Rd | Culex tarsalis |
Dead Birds: 13
| n | Date Reported | City | Cross Streets | Species | |
|---|---|---|---|---|---|
| 1 | 7/29/18 | Brentwood | Sycamore Ave x Garin Pky | California Scrub-Jay | |
| 2 | 8/5/18 | Discovery Bay | Discovery Bay Blvd x Willow Lake Rd | California Scrub-Jay | |
| 3 | 8/5/18 | Discovery Bay | Dune Point Wy x Dune Point Pl | California Scrub-Jay | |
| 4 | 8/8/18 | Brentwood | Walnut Blvd x Carnegie Ln | American Crow | |
| 5 | 8/15/18 | Brentwood | Fertado Ln x Ellisa Ln | American Crow | |
| 6 | 8/15/18 | Discovery Bay | Wayfarer Dr x Cherry Hills Dr | American Crow | |
| 7 | 8/15/18 | Antioch | Valley Wy x Ridgeview Dr | American Crow | |
| 8 | 8/15/18 | Concord | Concord Blvd x Crestwood Cir | California Scrub Jay | |
| 9 | 8/28/18 | Martinez | Blum Rd x Alan Wy | California Scrub Jay | |
| 10 | 8/29/18 | Discovery Bay | Westport Cir x N Lakefront Loop | American Crow | |
| 11 | 8/30/18 | Discovery Bay | Greenfield Wy x Greenfield Ct | American Crow | |
| 12 | 9/12/18 | Oakley | Main St x Norcross Ln | American Crow | |
| 13 | 9/27/18 | Brentwood | Fertado Ln x Marsh Creek Rd | American Crow |
Sentinel Chicken Flocks: 3
| #/10 | Date Bleed | Area |
|---|---|---|
| 7 | 7/2/18 | Holland Tract |
| 3 | 7/16/18 | Martinez |
| 3 | 8/13/18 | Holland Tract |
| 1 | 9/10/18 | Martinez |
| 1 | 9/10/18 | Oakley |
| 1 | 9/24/18 | Oakley |
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 |
|---|---|---|---|