Effect decontamination procedure on surface contaminants
| Treatment | Contamination | Degree of contamination | ||||
|---|---|---|---|---|---|---|
| no | yes | >20 colonies per plate | <20 colonies per plate | |||
| Control | 24 | 82 | 43 | 39 | ||
| After rinsing | 37 | 69 | 25 | 44 | ||
| After rinsing and PVP-I | 69 | 37 | 8 | 29 | ||
| Pearson χ2 | 41.87 | 10.85 | ||||
| Significance | 0.0000 | 0.0044 | ||||