TABLE 1.
Bacterial strains used in the present study and their susceptibilities to opsonic killing by antibodies specific to E. faecalis 12030 CP
| Bacterial strain | Origin | % Killeda | Pb |
|---|---|---|---|
| E. faecalis | |||
| 12030 | Clinical isolate; prototype strain for CP antigen | 81 | <0.01 |
| 12107 | Clinical isolate | 25 | NS |
| OG1RF | G. Dunneyc | 71 | <0.01 |
| Vancomycin-resistant E. faecium | |||
| 838970 | Clinical isolate | 64 | <0.01 |
| 805370 | Clinical isolate | 78 | <0.01 |
a
Opsonophagocytic assay using immune rabbit serum raised against polysaccharide of E. faecalis 12030. Percent killed = 100 − [(CFU surviving in immune serum/CFU surviving in normal serum) × 100].
b
Calculated by t test, with a hypothesized mean difference from CFU surviving in normal serum of zero.
c
University of Minnesota.