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Comparison of colony counts group by different sampling methods (intermittent sampling).
| Sampling method | Colony counts group | |
|---|---|---|
| <1 (n, %) | ≥1 (n, %) | |
| Biopsy channel (Group A) | 11 (91.7) | 1 (8.3) |
| Entire channel (Group B) | 7 (58.3) | 5 (41.7) |
| Disc brush (Group C) | 6 (50) | 6 (50) |
| Total | 24 (66.7) | 12 (33.3) |
