Volume 16, Number 8—August 2010
Research
Multiyear Surveillance for Avian Influenza Virus in Waterfowl from Wintering Grounds, Texas Coast, USA
Table A6
Apparent prevalence of avian influenza virus by age, sex, and detection method in hunter-harvested waterfowl, Texas mid–Gulf Coast, USA, September–January 2006–07, 2007–08, and 2008–09
Age/sex |
Hunting season |
Total, 2006–09 |
||||||||||||
2006–07 |
2007–08 |
2008–09 |
||||||||||||
No. tested |
Real-time RT-PCR* |
VI† |
No. tested |
Real-time RT-PCR* |
VI |
No. tested |
Real-time RT-PCR* |
VI |
No. tested |
Real-time RT-PCR* |
VI |
|||
Adult | ||||||||||||||
Hen | 483 | 34 (7.0) | 5 (1.0) | 468 | 55 (11.8) | 20 (4.3) | 259 | 10 (3.9) | 1 (0.4) | 1,210 | 99 (8.2) | 26 (2.2) | ||
Drake | 580 | 24 (4.1) | 3 (0.5) | 704 | 69 (9.8) | 19 (2.7) | 221 | 13 (5.9) | 0 | 1,505 | 106 (7.0) | 22 (1.5) | ||
Total | 1,063 | 58 (5.5) | 8 (0.8) | 1,172 | 124 (10.6) | 39 (3.3) | 480 | 23 (4.8) | 1 (0.2) | 2,715 | 205 (7.6) | 48 (1.8) | ||
p value |
– |
0.038 |
0.33 |
– |
0.288 |
0.141 |
– |
0.301 |
0.355 |
– |
0.264 |
0.177 |
||
Juvenile | ||||||||||||||
Hen | 250 | 15 (6.0) | 5 (2.0) | 409 | 60 (14.7) | 20 (4.9) | 136 | 10 (7.4) | 0 | 795 | 85 (10.7) | 25 (3.1) | ||
Drake | 254 | 27 (10.7) | 12 (4.7) | 344 | 45 (13.1) | 20 (5.8) | 80 | 9 (11.3) | 4 (5.0) | 678 | 81 (12.0) | 36 (5.3) | ||
Total | 504 | 42 (8.3) | 17 (3.4) | 753 | 105 (13.9) | 40 (5.3) | 216 | 19 (8.8) | 4 (1.9) | 1,473 | 166 (11.3) | 61 (4.1) | ||
p value | – | 0.060 | 0.090 | – | 0.531 | 0.573 | – | 0.329 | 0.008 | – | 0.448 | 0.038 |
*RT-PCR, reverse transcription–PCR. No. positive (apparent prevalence, %).
†VI, virus isolation. No. positive (apparent prevalence, %). Boldface indicates significance.