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Summary of serological analysis of chicken serum collected in southern China from April to November 2006 against H5N1 influenza viruses from different sublineages
| Virus | Sublineage | NI titer range |
|||
|---|---|---|---|---|---|
| < | 20–40 | 80–160 | ≥320 | ||
| Dk/FJ/1734/05 | FJ-like | 30 | 25 | 18 | 3 |
| Ck/GY/3570/05 | GY2 | 9 | 16 | 35 | 16 |
| Dk/YN/4400/05 | YN2 | 4 | 14 | 41 | 17 |
Virus sublineages were defined by phylogenetic analysis of the HA gene (Fig. 3). <, lowest dilution tested (1:20); NI, neutralizing inhibition.
