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Table 3 Comparison of Duplex-PCR and different result combination of other diagnostic methods tested

From: Evaluation of the performance of an in-house duplex PCR assay targeting the IS6110 and rpoB genes for tuberculosis diagnosis in Cameroon

Sample category    PCR Results
n % IS6110 rpoB D-PCR
   (−) (+) (−) (+) (−) (+)
Smear (+) Culture (+) 44 34 3 41 4 40 2 42
Smear (−) Culture (+) 7 5.4 1 6 3 4 1 6
Smear (−) Culture (−) 62 48 58 4 58 4 58 4
Smear (+) Culture contaminated 1 0.7 0 1 0 1 0 1
Smear (−) Culture contaminated 5 3.9 5 0 5 0 5 0
Smear (+) Culture (−) 2 1.6 0 2 0 2 0 2
Clinically diagnosed TB 8 6.2 1 7 2 6 1 7
Total 129 100 68 61 72 57 67 62
  1. (−) = negative, (+) = Positive