Table III.
Histological and bacteriological results after Streptococcus suis infections of pigs (post-mortem results)
| Macroscopic lesionsa |
Bacteriological resultsb |
||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Groupsc | Lymph nodes | Liver | Heart | Spleen | Lung | Joints | Brain | Lymph nodes | Liver | Heart | Spleen | Lung | Joints | Brain | Tonsils |
| Isolate 1330 (Group 2; n = 7) | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 0 | 1 | 0 | 1 | 0 | 5 |
| Isolate 89-1591 (Group 3; n = 7) | 2 | 1 | 1 | 0 | 0 | 6 | 4 | 5 | 2 | 5 | 4 | 5 | 4 | 4 | 4 |
| Isolate 166′ (Group 4; n = 7) | 5 | 4 | 4 | 5 | 6 | 7 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
a
Number of animals with lesions in different organs at necropsy
b
Number of animals with S. suis isolated from different organs
c
Animals of groups 2, 3, and 4 (7 pigs in each group) were intravenously infected with S. suis. Animals of group 1 (8 pigs) received broth medium in the same conditions and were sacrificed 8 d after experimental inoculation; no lesions were recorded in these animals and S. suis was not isolated from the different organs described above