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Table 1 Outcomes of M. ulcerans primary culturing

From: Primary cultivation: factors affecting contamination and Mycobacterium ulcerans growth after long turnover time of clinical specimens

Attribute Non-contamination vs. contamination # M. ulcerans growth vs. no growth ## M. ulcerans growth vs. contamination or no growth ###
M. ulcerans growth per swab (%) 71/443 (16.03) 71/220 (32.27) 71/302 (23.50)
M. ulcerans growth per decontamination procedure (%) Total 80/680 (11.76) 80/315 (25.40) 80/466 (17.17)
NaOH_10min 21/106 (19.81) 21/59 (35.59) 21/99 (21.21)
NaOH_20min 19/214 (8.88) 19/113 (16.81) 19/139 (13.67)
OA_1h 17/157 (10.83) 17/73 (23.29) 17/118 (14.41)
OA_30min 23/203 (11.33) 23/70 (32.86) 23/110 (20.91)
M. ulcerans growth per inoculation (%) 88/1125 (7.82) 88/440 (20.00) 88/700 (12.57)
M. ulcerans growth per patient (%) 31/95 (32.63) 31/66 (46.97) 31/72 (43.06)
Contamination per swab (%) 284/443 (64.11) - 188/302 (62.25)
Contamination per decontamination procedure (%) Total 346/680 (50.88) - 223/466 (47.85)
NaOH_10min 54/106 (50.94) - 48/99 (48.48)
NaOH_20min 97/214 (45.33) - 58/139 (41.73)
OA_1h 74/157 (47.13) - 54/118 (45.76)
OA_30min 121/203 (59.61) - 63/110 (57.27)
Contamination per inoculation (%) 446/1125 (39.64) - 260/700 (37.14)
No growth (%) 591/1125 (52.53) 352/440 (80.00) 352/700 (50.29)
Days to primary outcome* 5.0 (4.0; 11.0) 67.0 (55.0; 105.2) 67.0 (55.0; 105.2)
  1. #Analysis of 1125 inoculations from 95 patients with contamination as the primary outcome.
  2. ##Analysis of 440 inoculations from 66 patients with M. ulcerans growth as the primary outcome.
  3. ###Analysis of 700 inoculations from 72 patients with M. ulcerans growth as the primary outcome.
  4. *Median with IQR in parentheses.