TABLE 3.
Hemagglutination of A(H9N2) viruses using resialylated red blood cells
| Virus | Subtype | HA titera
|
|||
|---|---|---|---|---|---|
| TRBC | α2-6 SA TRBC | α2-3 SA TRBC | Desialyated TRBC | ||
| HK/1073 | A(H9N2) | 2,048 | 4,096 | 8,192 | <2 |
| HK/33982 | A(H9N2) | 4,096 | 4,096 | 8,192 | <2 |
| Bang/0994 | A(H9N2) | 2,048 | 4,096 | 4,096 | <2 |
| HK/308 | A(H9N2) | 4,096 | 8,192 | 4,096 | <2 |
| A-L/39 | A(H9N2) | 4,096 | 8,192 | 4,096 | <2 |
| ck/VN/70 | A(H9N2) | 1,024 | 2,048 | 1,024 | <2 |
| ck/VN/NA4 | A(H9N2) | 2,048 | 2,048 | 2,048 | <2 |
| ck/VN/119 | A(H9N2) | 1,024 | 1,024 | <2 | <2 |
| ck/VN/167 | A(H9N2) | 2,048 | 2,048 | <2 | <2 |
| Shanghai/1 | A(H7N9) | 2,048 | 4,096 | 4,096 | <2 |
| Cal/7 | A(H1N1) | 32 | 64 | <2 | <2 |
| Switz/13 | A(H3N2) | 1,024 | 1,024 | 512 | <2 |
a
HA titers were measured with untreated turkey red blood cells (TRBC), Vibrio cholerae-treated TRBCs (desialylated), or α2,6 or α2,3 resialylated TRBCs. HA titer is representative of duplicate experiments and is the reciprocal of the highest dilution that results in agglutination of TRBC.