Table 2 Prevalence of influenza A virus, separated by month, in wild waterfowl in Norway 2006-2007.
From: Prevalence and subtypes of Influenza A Viruses in Wild Waterfowl in Norway 2006-2007
Year Month | 2006 Ducks No. of positive/ No. of tested | 2006 Gulls No. of positive/ No. of tested | 2007 Ducks No. of positive/ No. of tested | 2007 Gulls No. of positive/ No. of tested |
|---|---|---|---|---|
August | 2/102 | 1/47 | 14/186 | 7/123 |
| Â | 1.9% | 2.1% | 7.5% | 5.7% |
September | 10/100 | 5/92 | 30/250 | 24/270 |
| Â | 10% | 5.4% | 12% | 8.9% |
October | 23/137 | 5/68 | 43/204 | 7/87 |
| Â | 16.8% | 7.4% | 21.1% | 8.0% |
November | 23/201 | 2/101 | 35/190 | 13/100 |
| Â | 11.4% | 2.0% | 18.4% | 13% |
December | 2/86 | 9/291 | 9/73 | 1/34 |
| Â | 2.3% | 3.1% | 12.3% | 2.9% |
TOTAL | 60/626 | 22/599 | 131/903 | 52/614 |
| Â | 9.6% | 3.7% | 14.5% | 8.5% |