Historical West Nile Virus Activity in San Diego County

Year
(click link for map)
Mosquito Batches Birds Horses Humans* Sentinel Chickens** Total Source Positives
2021 0 1 0 3 - 4
2020 2 1 0 1 - 4
2019 0 2 0 3 - 5
2018 3 1 0 2 - 6
2017 9 43 1 2 - 55
2016 99 266 1 22 9 397
2015 49 367 1 44 12 473
2014 2 41 3 13 6 65
2013 0 9 0 0 0 9
2012 0 1 0 2 0 3
2011 1 0 0 0 0 1
2010 1 2 0 0 0 3
2009 5 38 0 4 5 52
2008 40 563 5 36 15 659
2007 5 118 4 15 1 143
2006 0 19 3 1 0 23
2005 0 162 0 1 0 163
2004 0 34 2 2 0 38
2003 0 5 1 0 0 6

* Cases as reported by CDPH, includes non-locally acquired cases, last updated 12/31/2021

** Use of sentinel chickens was discontinued in 2017


Questions?

  (858) 694-2888

  vector@sdcounty.ca.gov