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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
  1.9% 2.1% 7.5% 5.7%
September 10/100 5/92 30/250 24/270
  10% 5.4% 12% 8.9%
October 23/137 5/68 43/204 7/87
  16.8% 7.4% 21.1% 8.0%
November 23/201 2/101 35/190 13/100
  11.4% 2.0% 18.4% 13%
December 2/86 9/291 9/73 1/34
  2.3% 3.1% 12.3% 2.9%
TOTAL 60/626 22/599 131/903 52/614
  9.6% 3.7% 14.5% 8.5%
  1. The table gives the number of positive samples, the total number of samples tested as well as the prevalence in percent.