TABLE 1.
Cytotoxicity of viable S. suis or of its culture supernatant to BMEC as determined by measurement of LDH release
| Treatment | Hemolysin productiona | % Cytotoxicityb |
|---|---|---|
| Strain 31533 overnight culture supernatant | Yes | 73.0 ± 9.5 |
| Strain 89-1591 overnight culture supernatant | No | 0.0 ± 0.0c |
| Live strain 31533 | Yes | 98.5 ± 2.6 |
| Heat-killed strain 31533 | No | 0.0 ± 0.0c |
| Live strain 89-1591 | No | 0.0 ± 0.0c |
a
Determined by red-cell lysis assay (22).
b
Values are means ± standard deviations (at least three samples per group).
c
Significantly different (P < 0.05) from the value for nontreated suilysin-producing strain 31533 or for its culture supernatant, as calculated by Student's t test.