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 1
Sampling data and locations of analyses*
| Season | No. mallards screened | Dates | PCR screening location | PCR method used | Subtyping location |
|---|---|---|---|---|---|
| 2002 Fall | 897 | 9/29–12/16 | EMC | Taqman | EMC |
| 2003 Spring | 348 | 4/14–6/30 | SMI | Cyber-green | EMC |
| 2003 Fall | 755 | 7/1–12/18 | SMI | Cyber-green | EMC |
| 2004 Spring | 346 | 3/26–6/30 | KU | Cyber-green | EMC |
| 2004 Fall | 789 | 7.1–12/15 | KU | Cyber-green | Not performed |
| 2005 Spring | 155 | 4/3–6/30 | KU | Cyber-green | Not performed |
| 2005 Fall | 816 | 7/5–12/13 | KU | Cyber-green | Not performed |
| Total | 4,106 |
*EMC, Erasmus Medical Center; SMI, Swedish Institute for Disease Prevention and Control; KU, Kalmar University.
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