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Comparison of bacterial colony counts group by different sampling methods (continuous sampling).
| Sampling method | Colony count group | |
|---|---|---|
| <1 (n, %) | ≥1 (n, %) | |
| Biopsy channel (Group A) | 11 (91.7) | 1 (8.3) |
| Entire channel (Group B) | 8 (66.7) | 4 (33.3) |
| Disc brush (Group C) | 8 (66.7) | 4 (33.3) |
| Total | 27 (75) | 9 (25) |
