| Preoperative microbiological cultures | |
| Bacterium spp | % of cases |
| Staphylococcus | 52.4% (11) |
| Staphylococcus aureus | 28.6% (6) |
| MRSA “Methicillin resistant Staphylococcus aureus” | 4.8% (1) |
| Staphylococcus epidermidis | 9.5% (2) |
| Staphylococcus lugdunensis | 4.8% (1) |
| Staphylococcus warneri | 4.8% (1) |
| Streptococcus | 28.6% (6) |
| Streptococcus pneumoniae | 9.5% (2) |
| Streptococcus oralis | 4.7% (1) |
| Streptococcus harei | 4.7% (1) |
| Beta hemolytic streptococcus | 4.7% (1) |
| Streptococcus mutans | 4.7% (1 |
| Viridans streptococci | 4.7% (1) |
| Others | 4.8% |