Table 1 Effect of decontamination time on culture results in cetylpyridinium chloride (CPC) treated and non-CPC samples from tuberculosis (TB) patients in Tanzania
Culture grading (WHO) | Decontamination of CPC treated samples, n (%) | |||||
|---|---|---|---|---|---|---|
20 min1 | 15 min2 | 10 min3 | ||||
Non-CPC | CPC | Non-CPC | CPC | Non-CPC | CPC | |
Contaminated | 7 (14) | 1 (2) | 8 (16) | 1 (2) | 7 (14) | 0 (0) |
Negative | 17 (34) | 4 (8) | 8 (16) | 2 (4) | 6 (12) | 3 (6) |
Positive | 26 (52) | 45 (90) | 34 (64) | 47 (94) | 37 (74) | 47 (94) |
< 20 colonies | 2 (4) | 3 (6) | 2 (4) | 2 (4) | 0 (0) | 0 (0) |
1+ | 5 (10) | 7 (14) | 11(22) | 9 (18) | 4 (8) | 7 (14) |
2+ | 10 (20) | 17 (34) | 11 (22) | 18(36) | 12(24) | 15 (30) |
3+ | 9(18) | 18 (36) | 10 (20) | 18 (36) | 21(42) | 25 (50) |
Total | 50 (100) | 50 (100) | 50 (100) | 50 (100) | 50 (100) | 50 (100) |