Table I.
Schedule of post-mortem examinations
| Groups of pigsa |
|||
|---|---|---|---|
| Days post infection | 2 | 3 | 4 |
| 2 | 2b | 2 (1c) | 1 |
| 3 | — | — | 3 (1c) |
| 4 | — | — | 1 |
| 6 | 2 | 1 | 2 |
| 8 | 2 | 2 | — |
| 14 | 1 | 2 | — |
| Total of animals | 7 | 7 | 7 |
a
Animals of groups 2, 3, and 4 were intravenously infected with 3 different strains of Streptococcus suis (group 2: 1330; group 3: 89-1591; group 4:166′). Animals of group 1 (negative control) received broth medium and were sacrificed 8 d post-infection
b
Number of sacrificed animals
c
Pigs died naturally 2 or 3 d after experimental infection