TABLE 1.
Determination of neurovirulence of passaged viruses compared to parental viruses R3659 and M002
| Virus | LD50 (PFU) |
|---|---|
| R3659 | 1.54 × 107 |
| vtD54-R3659 | 1.67 × 106 |
| vvD54-R3659 | >3 × 107 |
| M002 | 2 × 107 |
| vtD54-M002 | 5.1 × 105 |
| vvD54-M002 | >3 × 107 |
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