Surface bacterial contamination of trolleys (n=51) near dental units
| Surface bacterial contamination (cfu/24 cm2) | ||||
|---|---|---|---|---|
| Agar plates | Fungi | Staphylococcus aureus | β-haemolytic streptococci | |
| Positive samples (%) | 100.0 | 60.8 | 9.8 | 13.7 |
| Mean | 67 | 12 | 96 | 7 |
| SD | 145 | 20 | 123 | 6 |
| Median | 13 | 4 | 40 | 8 |
| Minimum | 5 | 1 | 8 | 1 |
| Maximum | 630 | 85 | 300 | 16 |