Volume 11, Number 10—October 2005
Research
Mallards and Highly Pathogenic Avian Influenza Ancestral Viruses, Northern Europe
Vincent J. Munster*, Anders Wallensten†‡, Chantal Baas*, Guus F. Rimmelzwaan*, Martin Schutten*, Björn Olsen§¶, Albert D.M.E. Osterhaus*, and Ron A.M. Fouchier*
Table 1
Hemagglutination inhibition assays with postinfection ferret antisera and hyperimmune rabbit antisera raised against H7 influenza A viruses
| Virus | A/Eq/Prague/1/54* | A/Seal/Mass/1/80* | A/Neth/219/03† | A/Mallard/Neth/12/00† | A/Neth/33/03† |
|---|---|---|---|---|---|
| A/Equine/Prague/1/54 H7N7 | 1:1,280‡ | 1:1,280 | <1:20 | <1:20 | <1:20 |
| A/Seal/Massachusetts/1/80 H7N7 | 1:160 | 1:1,280 | <1:20 | <1:20 | 1:20 |
| A/Netherlands/219/03 H7N7 | 1:160 | 1:1,280 | 1:40 | 1:40 | 1:80 |
| A/Mallard/Netherlands/12/00 H7N3 | 1:160 | 1:1,280 | 1:20 | 1:80 | 1:40 |
| A/Netherlands/33/03 H7N7 | 1:320 | 1:1,280 | 1:80 | 1:160 | 1:160 |
| A/Mallard/Sweden/56/02 H7N7 | 1:640 | 1:5,120 | 1:80 | 1:80 | 1:160 |
| A/Mallard/Sweden/105/02 H7N7 | 1:320 | 1:2,560 | 1:80 | 1:80 | 1:80 |
| A/Mallard/Sweden/85/02 H7N7 | 1:160 | 1:1,280 | 1:40 | 1:80 | 1:80 |
*Hyperimmune rabbit antisera.
†Postinfection ferret antisera.
‡Homologous titers are represented boldfaced and underlined.
