Table 1. Haemagglutination titres for representative virus isolates from 2000 to 2016 using two erythrocyte sources, in the absence or presence of oseltamivir.
| Virus isolate* | Haemagglutination titre (HAU per 25 µl) | |||
|---|---|---|---|---|
| Turkey erythrocytes | Human type O erythrocytes | |||
| Oseltamivir | Oseltamivir | |||
| − | + | − | + | |
| A/NL/056/00 | 32 | 16 | 32 | 32 |
| A/NL/118/01 | 24 | 24 | 32 | 32 |
| A/NL/001/02 | 64 | 64 | 48 | 48 |
| A/NL/109/03 | 64 | 64 | >64 | >64 |
| A/NL/023/04 | 32 | 24 | 64 | 64 |
| A/NL/093/05 | 48 | 48 | 64 | 64 |
| A/NL/020/06 | 64 | <2 | 64 | 24 |
| A/NL/198/06 | 64 | 64 | 64 | 64 |
| A/NL/004/07 | 48 | <2 | >64 | 32 |
| A/NL/038/07 | 64 | 64 | 64 | 48 |
| A/NL/379/08 | >64 | <2 | 64 | 4 |
| A/NL/761/09 | 64 | <2 | 64 | 8 |
| A/NL/034/10 | 48 | <2 | 64 | 16 |
| A/NL/713/11 | 64 | <2 | 64 | 2 |
| A/NL/003/12 | 4 | <2 | 8 | 2 |
| A/NL/075/12 | 32 | <2 | 48 | <2 |
| A/NL/2249/13 | 24 | <2 | nt | nt |
| A/NL/252/14 | 32 | <2 | nt | nt |
| A/NL/584/15 | 32 | <2 | nt | nt |
| A/NL/354/16 | 8 | 2 | nt | nt |
nt, Not tested.
*Representative strains for each year.