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Table 1 Results from Xpert MTB/RIF, CTM-MTB and DTB

From: Comparison of Xpert MTB/RIF with ProbeTec ET DTB and COBAS TaqMan MTB for direct detection of M. tuberculosis complex in respiratory specimens

  Numbers of samples with indicated test results
  Xpert MTB/RIF CTM-MTB DTB
  Pos Neg Inv Pos Neg Inv Pos Neg Inv
TB 50 17 1 48 17 3 53 14 1
MIC pos, Cx pos 16 1 0 14 1 2 17 0 0
MIC neg, Cx pos 34 16 1 34 16 1 36 14 1
no TB 2 51 0 0 51 2 1 52 0
MIC neg, Cx neg 0 29 0 0 28 1 0 29 0
NTM 2 22 0 0 23 1 1 23 0
TOTAL 52 68 1 48 68 5 54 66 1
  1. Cx culture (fluid or solid media), MIC smear microscopy, TB tuberculosis, NTM non-tuberculous mycobacteria, neg negative, pos positive, inv invalid test result.