Volume 16, Number 8—August 2010
Research
Multiyear Surveillance for Avian Influenza Virus in Waterfowl from Wintering Grounds, Texas Coast, USA
Pamela J. Ferro, Christine M. Budke, Markus J. Peterson, Dayna Cox, Emily Roltsch, Todd Merendino1, Matt Nelson, and Blanca Lupiani
Table A5
Comparison of apparent prevalence of avian influenza virus by sex and detection method in hunter-harvested waterfowl, Texas mid–Gulf Coast, USA, September–January 2006–07, 2007–08, and 2008–09
| Hunting season |
Hen |
Drake |
p value for
rRT-PCR, VI |
|||||
| No. tested |
Real-time RT-PCR* |
VI† |
No. tested |
Real-time RT-PCR* |
VI |
|||
| 2006–07 | 967 | 7.14 (5.51–8.76) | 1.24 (0.54–1.94) | 1,083 | 6.10 (4.67–7.53) | 1.48 (0.76–2.20) | 0.343, 0.645 | |
| 2007–08 | 895 | 13.30 (11.10–15.50) | 4.69 (3.31–6.08) | 1,059 | 10.70 (8.89–12.60) | 3.77 (2.62–4.92) | 0.084, 0.312 | |
| 2008–09 |
400 |
5.00 (2.86–7.14) |
0.25 (0.01–1.38) |
303 |
7.26 (4.34–10.18) |
1.32 (0.36–3.35) |
0.210, 0.171 |
|
| Total‡ | 2,262 | 9.20 (8.00–10.39) | 2.39 (1.76–3.02) | 2,445 | 8.26 (7.17–9.35) | 2.41 (1.80–3.02) | 0.255, 0.956 | |
*RT-PCR, reverse transcription–PCR. Apparent prevalence, % (95% confidence interval).
†VI, virus isolation. Apparent prevalence, % (95% confidence interval).
‡Total = all 3 seasons combined (September−January 2006–07, 2007–08, and 2008−09).
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