TABLE 1.
HI test results for Sw/ONT/99-1 and additional selected influenza A virus reference strains
| Virus | Subtype | Titer in postinfection chicken serum
|
|||||
|---|---|---|---|---|---|---|---|
| Swine/England/ 117316/86a | Swine/England/ 163266/87b | Swine/England/ 195852/92c | Swine/Texas/ 1/98b | Chicken/Alabama/ 75 | Duck/Czechoslovakia/ 56 | ||
| Swine/England/117316/86 | H1N1 | 640d | <40 | 40 | <40 | <40 | <40 |
| Swine/England/163266/87 | H3N2 | <40 | 640 | <40 | <40 | <40 | <40 |
| Swine/England/195852/92 | H1N1 | 40 | <40 | 320 | <40 | <40 | <40 |
| Swine/Texas/4199-2/98 | H3N2 | <40 | 40 | <40 | 320 | <40 | <40 |
| Chicken/Alabama/75 | H4N8 | <40 | <40 | <40 | <40 | 80 | <40 |
| Duck/Czechoslovakia/56 | H4N6 | <40 | <40 | <40 | <40 | <40 | 160 |
| Duck/Alberta/119/79 | H4N6 | <40 | <40 | <40 | <40 | <40 | 160 |
| Duck/England/96/80 | H4N1 | <40 | <40 | <40 | <40 | <40 | 160 |
| Chicken/Belgium/909/85 | H4N6 | <40 | <40 | <40 | <40 | <40 | 80 |
| Duck/England/1086/85 | H4N6 | <40 | <40 | <40 | <40 | <40 | 160 |
| Swine/Ontario/01911-1/99 | H4N6 | <40 | <40 | <40 | <40 | 320 | 640 |
a
Classical swine H1 HA.
b
Human-like H3 HA.
c
Avian-like H1 HA.
d
HI titers are expressed as the reciprocal of the dilution of antisera inhibiting 4 hemagglutinating units of virus.