Table II.
Results of Streptococcus suis concentration in blood during the experiment
| Groups of pigsa |
|||||
|---|---|---|---|---|---|
| Days after Infection | 1 (control) | 2 (isolate 1330) | 3 (isolate 89-1591) | 4 (isolate 166′) | Statistical analysis |
| 1 | 0 ± 0 (0/8) | 1.0 ± 1.4 (1/7)b | 4.2 ± 4.3 (7/7) | 4.7 ± 4.6 (7/7) | P = 0.001 |
| 2 | 0 ± 0 (0/8) | 1.9 ± 2.1 (2/7) | 4.6 ± 4.6 (6/6) | 4.7 ± 4.8 (7/7) | P = 0.001 |
| 3 | 0 ± 0 (0/8) | 2.8 ± 3.1 (3/5) | 4.3 ± 4.4 (5/5) | 3.4 ± 3.3 (4/4) | P = 0.001 |
| 6 | 0 ± 0 (0/8) | 0 ± 0 (0/5) | 4.9 ± 5.1 (5/5) | 3.6 ± 3.6 (2/2) | P = 0.001 |
a
Group 1 was intravenously inoculated with broth medium. Groups 2, 3, and 4 were intravenously infected with S. suis strains 1330, 89-1591, and 166′, respectively
b
Streptococcus suis concentration (CFU log10/mL) ± standard error (number of pigs)