TABLE 1.

Results of 188 M. tuberculosis isolates tested by the PM and the manual MGIT for second-line drugs^a

Drug (concn, μg/ml)	PM result on 7H11 agar	No. of isolates with indicated MGIT result and drug (concn, μg/ml)		Manual MGIT
		S	R	% Sensitivity	% Specificity	% Accuracy
		OFX (2)
OFX (2)	S	147	0	100	100	100
	R	0	41
		KAN (2.5)
KAN (6)	S	116	0	98.6	100	99.4
	R	1	71
		ETH (2.5)
ETH (10)	S	125	36	96.2	77.6	80.3
	R	1	26
		ETH (5)
ETH (10)	S	137	25	100	84.5	86.7
	R	0	26
		CM (2.5)
CM (10)	S	157	0	100	100	100
	R	0	31

^aR, resistant; S, sensitive.