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

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

	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

Cx culture (fluid or solid media), MIC smear microscopy, TB tuberculosis, NTM non-tuberculous mycobacteria, neg negative, pos positive, inv invalid test result.

ISSN: 1471-2334