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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.