TABLE 1.

Detection of Mycobacterium tuberculosis complex and nontuberculous mycobacteria for TLA versus Xpert MTB/RIF^a

Xpert	TLA										Total
	Neg		Pos		NTM		Cont		Unknown
	No.	%	No.	%	No.	%	No.	%	No.	%
Total	3,857	84.8	322	7.1	11	0.2	255	5.6	102	2.2	4,547
Neg	3,536	91.2	32	0.8	10	0.3	218	5.6	83	2.1	3,879
Pos	161	35.3	274	60.1	1	0.2	18	3.9	2	0.4	456
High	24	15	124	77.5	1	0.6	11	6.9	0	0	160
Medium	39	35.1	70	63.1	0	0	2	1.8	0	0	111
Low	39	39.4	56	56.6	0	0	3	3	1	1	99
Very low	59	68.6	24	27.9	0	0	2	2.3	1	1.2	86
Inconclusive	76	81.7	2	2.2	0	0	12	12.9	3	3.2	93
Unknown	84	70.6	14	11.8	0	0	7	5.8	14	11.8	119

^aXpert, XpertMTB/RIF; TLA, thin-layer agar; Neg, negative result; Pos, positive result; NTM, nontuberculous mycobacteria; Cont, contamination; unknown, indeterminate result; inconclusive, an error or an invalid or no result; no., number of samples. High, medium, low, and very low indicate the level of positivity.