2017 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: 2

n Date Reported City Cross Streets Species
1 7/26/17 DIscovery Bay Point of TImber Rd. x Poe Dr. Culex pipiens
2 8/2/17 Byron Byron Hwy x Rankin Rd. Culex tarsalis

Dead Birds: 5

n Date Reported City Cross Streets Species
1 7/26/17 Walnut Creek Ygnacio Valley Rd. x Wiget Ln. American Crow
2 7/26/17 Walnut Creek Ygnacio Valley Rd. x Wiget Ln. American Crow
3 8/1/2017 Walnut Creek Ygnacio Valley Rd. x Wiget Ln. American Crow
4 8/3/2017 Danville Brookside Dr. x Greenbrook Dr. American Crow
5 8/8/2017 Discovery Bay Highway 4 x Discovery Bay Blvd. Western Scrub Jay

Sentinel Chicken Flocks: 1

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
4/10 8/7/17 Knightsen

Horses: 1

n Date Reported City Dead/Euthanized
1 8/11/2017 Brentwood No
 
Return to Top