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| Virus | MDT (h)a |
|---|---|
| rLaSota | 112 |
| rBan/AF | 122 |
| rLaSota-Ban/AF F | 148 |
| RLaSota-Ban/AF HN | 129 |
| rLaSota-Ban/AF F HN | >168 |
a Mean embryo death time (MDT): the mean time (h) for the minimum lethal dose of virus to kill all of the inoculated embryos. Pathotype definition: virulent strains, <60 h; intermediate virulent strains, 60 to 90 h; avirulent strains, >90 h.
