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Table 2 Effect of protocols on the recovery of M. ulcerans from BU samples, in-vitro

From: Evaluating decontamination protocols for the isolation of Mycobacterium ulcerans from swabs

Decontamination protocols

No. of tubes with M. ulcerans growth per protocola

Recovery rate (%) (p-value)

No. of tubes with contaminationa

Contamination rate (%) (p-value)

0.5% PI

0

0 (0.00)

0

0 (0.00)

1% PIb

0

0 (0.00)

0

0 (0.00)

1% CP/2% NaCl

33

47 (0.00)

15

21 (0.00)

2% CPC/4% NaCl

37

5 3(0.76)

10

14 (0.00)

5% Oxalic acid

31

44 (0.07)

20

29 (0.00)

10% Oxalic acid

10

14 (0.00)

12

17 (0.00)

0.5% Virkon

36

51 (0.40)

12

17 (0.00)

1% Virkon

6

0.1 (0.00)

7

10 (0.00)

  1. a n = total number of tests: 35 × 2 = 70,
  2. bConventional method, BU Buruli ulcer, PI Povidone iodine, CPC Cetyl pyridinium chloridem, NaCl Sodium chloride