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2005 Summary  > 2005 WNV Activity by County 04/05/06

 

2005 WNV Activity by County

2005 West Nile Activity
 
Humans
Horses
Dead Birds
Mosquito Pools*

Sentinel Chickens
WNV/SLE **

State Totals
935
456
3,046
1,242
1,053
Alameda
1
2
48
8
-
Alpine
-
-
-
-
-
Amador
4
7
24
-
-
Butte
25
7
79
4
53
Calaveras
2
6
10
-
1
Colusa
2
2
14
-
3
Contra Costa
11
10
93
1
21
Del Norte
-
-
-
-
-
El Dorado
1
5
67
-
-
Fresno
68
33
97
71
85
Glenn
13
2
30
5
9
Humboldt
1
-
4
-
-
Imperial
1
-
-
10
62
Inyo
-
2
12
2
-
Kern
68
26
44
235
111
Kings
32
5
73
3
39
Lake
-
10
32
32
4
Lassen
-
1
3
-
-
Los Angeles
47
10
173
218
74
Madera
19
20
22
5
14
Marin
-
-
14
-
-
Mariposa
-
2
6
-
-
Mendocino
-
1
34
-
-
Merced
28
25
171
34
46
Modoc
-
-
1
-
-
Mono
-
1
1
-
-
Monterey
-
1
2
-
-
Napa
-
-
44
-
2
Nevada
4
5
27
-
2
Orange
17
-
302
83
Placer
35
23
84
20
2
Plumas
1
1
-
-
-
Riverside
104
46
111
111
161
Sacramento
177
33
70
122
9
San Benito
-
2
1
-
-
San Bernardino
35
3
74
40
89
San Diego
1
-
160
-
-
San Francisco
2
-
2
-
-
San Joaquin
36
19
24
1
16
San Luis Obispo
-
13
41
2
4
San Mateo
1
-
10
-
-
Santa Barbara
2
6
73
21
8
Santa Clara
5
1
144
3
-
Santa Cruz
-
-
2
-
-
Shasta
1
2
28
-
9
Sierra
-
-
-
-
-
Siskiyou
-
-
6
-
-
Solano
5
16
44
4
23
Sonoma
1
1
78
-
-
Stanislaus
92
46
235
114
72
Sutter
9
1
9
43
32
Tehama
4
3
47
-
1
Trinity
-
-
-
-
-
Tulare
60
22
226
16
71
Tuolumne
1
3
59
-
-
Ventura
1
8
62
2
8
Yolo
12
14
17
23
9
Yuba
6
10
12
9
10

* A mosquito pool is a collection of approximately 50 mosquitoes that are tested together for West Nile virus.

** WNV and SLE (St. Louis encephalitis) are closely related viruses in the family Flaviviridae and preliminary testing cannot distinguish between these two viruses.  Further testing is conducted as needed to determine if the sentinel chickens are antibody positive to WNV or SLE.

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