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Biological features of the parental and rescued viruses.
| Virus | Pathogenicity | Virus Titration | |||
|---|---|---|---|---|---|
| ICPI | MDT (Hours) | F Cleavage Site | EID50 | HA Titre | |
| IBS025/13 | 1.86 | 58.4 | 112RRQKRF117 | 9.2 log10 | 10 log2 |
| mIBS025 | 0.00 | 150.4 | 112GRQGRL117 | 8.9 log10 | 8 log2 |
ICPI = Intracerebral pathogenicity index in 1 day old chicks, MDT = Mean death time of chicken embryonated eggs, F = Fusion protein, HA = hemagglutination.
