Table 2.
Viral characteristics of the 23 genotypes in vivo and in vitro
| Genotype | Subtype | Replicability and pathogenicity | |||
|---|---|---|---|---|---|
| HA titer | TCID50/mL | EID50/mL | MLD50 | ||
| VC7 | H3N2 | 210 | 106.6 | 108.5 | n.d. |
| VC1235678 | H3N1 | 29 | 105.9 | 107.25 | 107.25 |
| VC235678 | H3N1 | 210 | 105.8 | 106.5 | n.d. |
| VC78 | H3N2 | 211 | 106.6 | 107.5 | n.d. |
| VC123578 | H3N2 | 210 | 106.8 | 107.5 | 104.2 |
| VC678 | H3N1 | 29 | 106.6 | 108 | n.d. |
| VC123678 | H3N1 | 210 | 106.4 | 107.5 | 104.9 |
| VC37 | H3N2 | 211 | 107.8 | 108 | 107 |
| VCnone | H3N2 | 210 | 106.8 | 106.5 | n.d. |
| VC3578 | H3N2 | 210 | 106.8 | 107.5 | n.d. |
| VC12367 | H3N1 | 210 | 107 | 107.75 | 105.5 |
| VC378 | H3N2 | 29 | 107.5 | 108 | 104.25 |
| VC27 | H3N2 | 210 | 105.8 | 108 | n.d. |
| VC237 | H3N2 | 210 | 106.8 | 107.5 | 107.26 |
| VC137 | H3N2 | 29 | 106.8 | 108.5 | n.d. |
| VC1378 | H3N2 | 29 | 107.2 | 108.25 | 107.75 |
| VC12378 | H3N2 | 210 | 106.8 | 107.5 | n.d. |
| VC23578 | H3N2 | 29 | 106.4 | 107.25 | n.d. |
| VC125678 | H3N1 | 28 | 106.2 | 106.5 | 104 |
| VC13578 | H3N2 | 29 | 106.9 | 107.25 | 106.85 |
| VC367 | H3N1 | 210 | 106.6 | 107.5 | n.d. |
| VC578 | H3N2 | 210 | 106.6 | 108.75 | n.d. |
| VC67 | H3N1 | 28 | 106.9 | 108.5 | n.d. |
EID 50 50 % egg infectious dose; HA hemagglutinin; MLD 50 50 % mouse lethal dose; n.d. not determined; TCID 50 50 % tissue culture infectious dose