Volume 13, Number 3—March 2007
Research
Surveillance of Influenza Virus A in Migratory Waterfowl in Northern Europe
Anders Wallensten*†, Vincent J. Munster‡, Neus Latorre-Margalef§, Mia Brytting¶, Johan Elmberg#, Ron A.M. Fouchier‡, Thord Fransson**, Paul D. Haemig§, Malin Karlsson¶, Åke Lundkvist¶, Albert D.M.E. Osterhaus‡, Martin Stervander††, Jonas Waldenström§‡‡, and Björn Olsen§§§
Table 3
Influenza A virus subtype combinations in mallards sampled at Ottenby Bird Observatory, 2002–2004*
| Neuraminidase | Total | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Hemagglutinin | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| 1 | 5 | 2 | 1 | 8 | ||||||
| 2 | 2 | 7 | 1 | 10 | ||||||
| 3 | 1 | 1 | 5 | 7 | ||||||
| 4 | 3 | 19 | 22 | |||||||
| 5 | 5 | 3 | 1 | 3 | 12 | |||||
| 6 | 2 | 12 | 1 | 1 | 3 | 19 | ||||
| 7 | 16 | 1 | 17 | |||||||
| 8 | 4 | 4 | ||||||||
| 9 | 0 | |||||||||
| 10 | 2 | 1 | 1 | 2 | 2 | 2 | 3 | 13 | ||
| 11 | 1 | 1 | 2 | 1 | 1 | 1 | 7 | 14 | ||
| 12 | 2 | 1 | 3 | |||||||
| 13 | 0 | |||||||||
| 14 | 0 | |||||||||
| 15 | 0 | |||||||||
| 16 | 0 | |||||||||
| Total | 10 | 26 | 12 | 5 | 6 | 26 | 18 | 11 | 15 | 129 |
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