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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 3
Comparison of apparent prevalence of avian influenza virus in hunter-harvested waterfowl, Texas mid–Gulf Coast, USA, September–January 2006–07, 2007–08, and 2008–09*
| Hunting season | Juvenile waterfowl† |
Adult waterfowl† |
p value |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|
| No. tested | rRT-PCR | VI | No. tested | rRT-PCR | VI | rRT-PCR | VI | |||
| 2006–07 | 518 | 8.30 (5.92–10.68) | 3.28 (1.75–4.82) | 1,081 | 5.46 (4.10–6.81) | 0.74 (0.23–1.25) | 0.029 | <0.001 | ||
| 2007–08 | 763 | 13.80 (11.30–16.20) | 5.50 (3.89–7.12) | 1,189 | 10.51 (8.77–12.20) | 3.28 (2.27–4.29) | 0.030 | 0.022 | ||
| 2008–09 |
222 |
8.56
(4.88–12.24) |
1.80
(0.49–4.55) |
489 |
4.70
(2.82–6.58) |
0.20
(0.01–1.13) |
0.043 |
0.035 |
||
| Total‡ | 1,503 | 11.10 (9.52–12.69) | 4.06 (3.06–5.06) | 2,759 | 1.74 (1.25–2.23) | 1.74 (1.25–2.23) | <0.001 | <0.001 | ||
*rRT-PCR, real-time reverse transcription–PCR; VI, virus isolation.
†Values for rRT-PCR and VI are apparent prevalence, % (95% confidence interval).
‡Total = the 3 hunting seasons combined (September–January, 2006–07, 2007–08, and 2008–09).
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- Page last updated: September 23, 2011
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- Centers for Disease Control and Prevention,
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