Volume 10, Number 6—June 2004
Dispatch
Antibody Prevalence of West Nile Virus in Birds, Illinois, 2002
Adam M. Ringia*
, Bradley J. Blitvich†, Hyun-Young Koo‡, Marshall Van de Wyngaerde*, Jeff D. Brawn‡, and Robert J. Novak*
, Bradley J. Blitvich†, Hyun-Young Koo‡, Marshall Van de Wyngaerde*, Jeff D. Brawn‡, and Robert J. Novak*Table 1
Birds, listed alphabetically by order, tested for WNV antibody in Illinois in 2002, including number of birds positive and number testeda
| Order | Common name | No. tested | WNV-positive no. (%) | 95% CI | |
|---|---|---|---|---|---|
| Anseriformes |
Canada Goose |
253 |
3 (1.2) |
0.3 to 3.4 |
|
| Wood Duck |
120 |
3 (2.5) |
0.5 to 7.1 |
||
| 3 additional species |
35 |
0 |
|||
| Columbiformes |
Mourning Dove |
11 |
1 (9.1) |
0.2 to 41.3 |
|
| Rock Doveb |
20 |
11 (55.0) |
31.5 to 76.9 |
||
| Galliformes |
Chukarb |
22 |
6 (27.3) |
10.7 to 50.2 |
|
| Domestic Chickenb |
63 |
5 (7.9) |
2.6 to 17.6 |
||
| 2 additional species |
16 |
0 |
|||
| Passeriformes |
Cedar Waxwing |
5 |
1 (20.0) |
0.5 to 71.6 |
|
| Blue Grosbeak |
2 |
1 (50.0) |
1.2 to 98.7 |
||
| Indigo Bunting |
28 |
1 (3.6) |
0.1 to 18.4 |
||
| Northern Cardinal |
129 |
16 (12.4) |
7.3 to 9.4 |
||
| American Crow |
157 |
5 (3.2) |
1.0 to 7.3 |
||
| Red-winged Blackbird |
39 |
3 (7.7) |
1.6 to 20.9 |
||
| Brown Thrasher |
19 |
2 (10.5) |
1.3 to 33.1 |
||
| Gray Catbird |
72 |
6 (8.3) |
3.1 to 17.3 |
||
| Ovenbird |
32 |
1 (3.1) |
0.1 to 16.2 |
||
| House Sparrow |
185 |
21 (11.4) |
7.1 to 16.8 |
||
| American Robin |
79 |
3 (3.8) |
0.8 to 10.7 |
||
| Swainson’s Thrush |
32 |
1 (3.1) |
0.1 to16.2 |
||
| 45 additional species |
422 |
0 (0) |
|||
| Strigiformes |
Great Horned Owlb |
9 |
4 (44.4) |
13.7 to 78.8 |
|
| 2 additional species |
3 |
0 |
|||
| Other (5 orders) |
10 species |
31 |
0 |
||
| Total (10 orders) | 81 species | 1784 | 94 (5.3) | 4.2 to 6.4 | |
aWNV, West Nile virus; CI, confidence interval.
bIndicates captive specimens.
