Table 3. Relative virulence of viridans group streptococci strains in a neutropenic mouse model*.
Strain | Streptococcus mitis cluster | Pitt bacteremia score of infected patient | LD50 |
---|---|---|---|
SVGS004 | 3 | 1 | 4.1 × 105 |
SVGS006 | 2 | 2 | 1.6 × 106 |
SVGS016 | 2 | 1 | 1.4 × 105 |
SVGS019 | 1 | 3 | 1.9 × 104 |
SVGS031 | 2 | 1 | 3.6 × 105 |
*SVGS, Shelburne viridans group streptococcus; LD50, considered, for the purpose of this study, to be the dose at which 50% of the animals nearly died.