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Table 1 Mean, median and standard deviation in the number of M. tuberculosis microcolonies, after decontamination of artificially infected sputum samples

From: Chlorhexidine decontamination of sputum for culturing Mycobacterium tuberculosis

M. tuberculosis H37Rv CIP 104475 Mean Median Standard variation
chlorhexidine −0.1 % 844.4 736.5 361
chlorhexidine −0.1 % - squalamine 100 μg/mL 1288 1396 576.3
chlorhexidine −0.35 % 477.1 453 154.5
chlorhexidine −1 % 665 630 207.6
NALC-NaOH 71.9 66 58.8
M. tuberculosis clinical isolate 1 Mean Median Standard variation
chlorhexidine-0.1 % 2493.1 2624.5 553.2
chlorhexidine-0.1 % - squalamine 100 μg/mL 1774.5 1309 498.2
chlorhexidine −0.35 % 1259.6 1238.5 393.1
chlorhexidine −1 % 1426.6 1434 357.5
NALC-NaOH 81.7 73 37.3
M. tuberculosis clinical isolate 2 Mean Median Standard variation
chlorhexidine-0.1 % 556.1 621 155.9
chlorhexidine-0.1 % - squalamine 100 μg/mL 440.4 433 134.6
chlorhexidine −0.35 % 237.9 202 127.4
chlorhexidine −1 % 184.7 180 50.7
NALC-NaOH 4.4 4 2.83
M. tuberculosis clinical isolate 3 Mean Median Standard variation
chlorhexidine-0.1 % 288.1 284.5 87.8
chlorhexidine-0.1 % - squalamine 100 μg/mL 124.4 136 26.1
chlorhexidine −0.35 % 174.9 194 76.5
chlorhexidine −1 % 140.7 142.5 25.5
NALC-NaOH 4.9 3 3.7