April 17 - 23 is West Nile and Mosquito and Vector Control Awareness Week in California! This week highlights the importance of preventing mosquito bites and protecting Californians from mosquito-borne diseases. Stop by the "Fight the Bite" event at the State Capitol in Sacramento on Thursday, April 21st from 1:00 - 4:00pm for more information. Contact your local mosquito and vector control district to learn about events in your area.

Interactive Map

Interactive Map View the interactive map courtesy of http://maps.calsurv.org - View Printable Map - Total Counties with WNV in 2018: 2 San Mateo, and Santa Clara. WNV Dead Bird Hotline Update The West Nile virus and Dead Bird Hotline is staffed with live operators from 8AM to 4:30PM, Monday through Friday (later we will also be staffed on Sundays). Call the hotline at 1-877-WNV-BIRD to report a dead bird. Or fill out an online report form here: Report a Dead Bird Hotline operators will determine if the bird meets criteria for pickup and testing They will arrange for suitable dead birds to be picked up by a local vector control or public health agency for West Nile virus testing. Dead bird reports are very important because they are usually the first indication that the virus is active in an area, and this allows CDPH and local agencies to monitor the virus and implement control measures throughout the year. Thank you for your report! Reporting a Dead Bird Video - view news and press release archives -

human cases YTD: 0 Counties: 0 No cases of human WNV illness have been reported positive for WNV in 2018.   horses YTD: 0 Counties: 0 No horses have tested positive for WNV in 2018.   dead birds YTD: 4 Counties: 2 4 dead birds from 2 counties have tested positive for WNV in 2018.   mosquito samples YTD: 0 Counties: 0 No mosquito samples have tested positive for WNV in 2018. A mosquito sample may contain up to 50 individual mosquitoes.   sentinel chickens YTD: 0 Counties: 0 No sentinel chickens have tested positive for WNV in 2018.

Help us track down the West Nile Virus by reporting all dead birds. You can submit an online report by clicking on the button on the right.

2003-2017 WNV Activity Summary

Element	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	Total
Human cases (fatal)	31 (0)	779 (29)	880 (19)	278 (7)	380 (21)	445 (15)	112 (4)	111 (6)	158 (9)	479 (20)	379 (15)	801 (31)	782 (53)	442 (19)	553 (44)	6,582 (292)
Horses	12	540	456	58	28	32	18	19	15	22	13	03	03	03	21	1,223
Dead birds	96	3,232	3,046	1,446	1,396	2,569	515	416	688	1,644	1,251	2,442	1,349	1,352	510	21,952
Mosquito samples	32	1,136	1,242	832	1,007	2,003	1,063	1,305	2,087	2849	2,528	3,340	3,329	3,528	3,371	29,652
Sentinel chickens	70	809	1,053	640	510	585	443	281	391	540	485	443	449	343	305	7,347
Squirrels	-	49	48	32	26	32	10	24	24	23	03	03	03	03	03	276
1 There were 20 imported human cases. 2 There were 3 imported horse cases. 3 No longer monitored.

The California Mosquito-borne Virus Surveillance and Response Program works to protect Californians from mosquito-borne viruses through environmental monitoring, laboratory testing, mosquito control, and public outreach.

Participating Agencies: California Department of Public Health | UC Davis Arbovirus Research and Training | Mosquito and Vector Control Association of California

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http://www.ca.gov