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Mean levels of air contamination assessed by SAS (TVC at 36°C, CFU/m3), prevalence of samples with microbial levels above the threshold level (180 CFU/m3)
| T0 | T1 | Statistical analysis | |
| Logarithmic mean | 2.0 (se = 0.05) | 2.0 (se = 0.07) | t = 0.11 (p = 0.91) |
| Geometric mean | 104.7 | 107.2 | |
| % positives | 39.1 (18/46) | 34.8 (16/46) | McN = 0.75 (p = 0.39) |
