Disease Updates

Shasta Mosquito and Vector Control
West Nile Virus Activity: 2004 - 2023

 
 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004
Humans
 0 4 1 3 2 0 1 1 1 3 2 1
1
0
0
0
1
9*
 4 1 5
Horses
 0 0 0 0 0 0 1 0 1 2 1 0
5
0
0
1
0
3
 0 1 10*
Sentinel Chickens
 0 5 3 3 3 1 4 4 3 18 11 21*
6
0
0
0
3
7
 4 7 5
Mosquito Samples
 0 152* 39 28 25 3 8 0 12 48 33 15
17
1
0
2
0
17
 7 0 12
Dead Birds
 0 2 1 0 0 1 5 2 3 15 6 38
36
0
4
9
7
45
 88 28 90*
Squirrels
 0 0 0 0 0 0 0 0 0 0 0 1
1
0
0
0
0
0
 2* 0 1














*All-Time District Record

The all-time District record for WNV+ Dead Birds was 90 set in 2004, though all dead bird collection and testing was curtailed early.
The record for horse cases (30 cases) was also in 2004 with 10 Horse fatalities.
Squirrels are no longer tested.  The record of two squirrels was in 2006.

WNV Risk Level: