TABLE 1.
Animals used in this study
| Virus | Stock titer | No. of animalsa examined at:
|
||||
|---|---|---|---|---|---|---|
| 60 h | 72 h | 84 h | 93 h | 96 h | ||
| PRV-Be | 3.5 × 108 | 4 | Noneb | None | None | None |
| PRV-Be | 4.0 × 108 | 2 | 3 | 1 | 2 | 1 |
| PRV-25 | 3.5 × 108 | 2 | 3c | 4 | 2 | 1 |
| PRV-26 | 2.3 × 108 | 2 | 3d | 3 | 2 | 3 |
| PRV-91 | 3.0 × 108 | 1 | 3 | 1 | 1 | 1 |
a
Numbers of animals that were euthanized and brains that were analyzed at the indicated times postinfection.
b
No animals infected with PRV-Becker survived more than 67 h postinfection.
c
Four animals infected with PRV-25 died unexpectedly at approximately 72 h postinfection, and these tissues were not suitable for processing. They are not included in the numbers shown in the table.
d
One animal infected with PRV-26 died unexpectedly at approximately 72 h postinfection, and this tissue was not suitable for processing. This animal is not included in the number shown in the table.