Volume 18, Number 10—October 2012
Research
Spread of Influenza Virus A (H5N1) Clade 2.3.2.1 to Bulgaria in Common Buzzards
Atanaska Marinova-Petkova, Georgi Georgiev, Patrick Seiler, Daniel Darnell, John Franks, Scott Krauss, Richard J. Webby, and Robert G. Webster
Table
Hemagglutination inhibition titers used to compare the antigenicity of influenza A(H5N1) virus strain A/common buzzard/Bulgaria/38WB/2010 with other common strains*
| Strain | Strain (clade) |
|||
|---|---|---|---|---|
| A/common magpie/Hong Kong/ 5052/2007 (2.3.2.1) | A/Muscovy duck/Vietnam/ 1455/2006 (2.3.2) | A/duck/Laos/ 3295/2006 (2.3.4) | A/Japanese white-eye/Hong Kong/1038/2006 (2.3.4) | |
| A/common magpie/Hong Kong/5052/2007 | 160 | 160 | <40 | <40 |
| A/duck/Laos/3295/2006 | <40 | <40 | 160 | 80 |
| A/Japanese white-eye/Hong Kong/1038/2006 | <40 | 40 | 160 | 320 |
| A/Muscovy duck/Vietnam/1455/2006 | 80 | 80 | <40 | <40 |
| A/common buzzard/Bulgaria/38WB/2010 | 80 | 80 | <40 | <40 |
*Values represent titers that are the reciprocal of the lowest dilution of ferret antisera that inhibited hemagglutination caused by 4 hemagglutination units of the virus.
