Table 2.
Cumulative infection rate at the end of challenge with strains VIO 5337, 2736 and 5708 and different passage numbers
| Generation | Morbidity (%) | ||
|---|---|---|---|
| Strain | |||
| VIO 5337 | VIO 2736 | VIO 5708 | |
| Control | 0.0 ± 0.0 | 0.0 ± 0.0 | 0.0 ± 0.0 |
| AP | 77.2 ± 11.0a | 23.3 ± 16.5a | 67.4 ± 15.0 |
| 5P | 47.3 ± 16.3 | 6.7 ± 0.0 | 46.9 ± 8.5 |
| 15P | 49.6 ± 14.9 | 3.3 ± 0.0 | 79.3 ± 7.4b |
The control was prepared in duplicate and values of the different strain passages represent four replicates.
a
Denotes significantly different from other passages of the same strain.
b
Denotes significantly different from the 5th passage of the same strain; PI, Post-infection.