Skip to main content

Table 6 Comparison of LAMP reactions using two different dyes, on DNA extracted using QIAGEN. Values in brackets represent the 95% CI

From: Evaluation of different DNA extraction methods and loop-mediated isothermal amplification primers for the detection of Mycobacterium ulcerans in clinical specimens

 

BURULI Primers

MU 2404 Primers

Calcein

HNB

Calcein

HNB

+

Total

+

Total

+

Total

+

Total

IS2404 (+)

54

8

62

55

7

62

54

8

62

57

5

62

IS2404 (−)

1

42

43

2

41

43

4

39

43

4

39

43

Total

55

50

105

57

48

105

58

47

105

61

44

105

Positivity (%)

51.4

52.4

51.4

54.3

Sensitivity (%)

87.10 (76.15 to 94.26)

88.71 (78.11 to 95.34)

87.10 (76.15 to 94.26)

91.94 (82.17 to 97.33)

Specificity (%)

97.67 (87.7 to 99.94)

95.35 (84.19 to 99.43)

90.70 (77.86 to 97.41)

90.70 (77.86 to 97.41)

PPV (%)

98.18 (88.59 to 99.73)

96.49 (87.63 to 99.07)

93.10 (84.08 to 97.18)

93.44 (84.82 to 97.32)

NPV (%)

84.00 (73.30 to 90.94)

85.42 (74.40 to 92.19)

82.98 (71.71 to 90.36)

88.64 (77.00 to 94.78)

Accuracy (%)

91.43 (84.35 to 96.01)

91.43 (84.35% to 96.01)

88.57 (80.89 to 93.95)

91.43 (84.35 to 96.01)