Table 2.
Staphylococcus species recovered from preoperative synovial fluid and intraoperative tissue samples
| Staphylococcus species | Number (%) of positive culture results | Number (%) of false-positive SF culture resultsc | Number (%) of false-negative SF culture resultsd | |
| Preoperative SF samplesa | Intraoperative tissue samplesb | |||
| S. aureus | 31% (25 of 80)e | 35% (25 of 71)f | 12% (3 of 25) | 12% (3 of 25) |
| S. epidermidis | 44% (35 of 80) | 42% (30 of 71) | 26% (9 of 35) | 13% (4 of 30) |
| S. lugdunensis | 10% (8 of 80) | 11% (8 of 71) | 0% | 0% |
| Other species | 15% (12 of 80) | 11% (8 of 71) | 50% (6 of 12) | 25% (2 of 8) |
| S. capitis | 10% (8 of 80) | 7% (5 of 71) | 38% (3 of 8) | 0% |
| S. caprae | 1% (1 of 80) | 1% (1 of 71) | 0% | 0% |
| S. haemolyticus | 1% (1 of 80) | 0% | 50% (1 of 2) | NA |
| S. hominis | 1% (1 of 80) | 1% (1 of 71) | 100% (1 of 1) | 100% (1 of 1) |
| S. saccharolyticus | 1% (1 of 80) | 0% | 100% (1 of 1) | NA |
| S. xylosus | 0% | 1% | NA | 100% (1 of 1) |
At least one synovial fluid sample has positive culturing results.
At least one tissue sample had culturing results positive for S. aureus and at least two tissue sample results positive for CNS.
Staphylococcus species isolated from synovial fluid and not cultured as a significant organism (as defined in footnote b) from an intraoperative tissue sample.
Staphylococcus species recovered as a significant organism (as defined in footnote b) from an intraoperative tissue sample and not cultured from synovial fluid.
Number/total number of staphylococcal species cultured from synovial fluid.
Number/total number of staphylococcal species cultured from intraoperative samples; SF = synovial fluid.