TABLE 1.

Inhibition of slowly growing NTM by linezolid at specified MICs

Mycobacterial speciesa	No. of isolates testedc	No. of isolates susceptible at indicated MICb (μg/ml) (cumulative % susceptible)
		≤0.5	1	≤2	2	≤4	4	8	16	32	>32
MAC	189			2 (1)	2 (2)		3 (4)	17 (13)	50 (39)	63 (72)	52 (100)
M. marinum	47		7 (17)	28 (74)	12 (100)
M. szulgai	10			2 (20)	3 (50)		5 (100)
M. gordonae	21	2 (10)	1 (14)	15 (86)			1 (90)		2 (100)
M. kansasii	19	2 (11)	2 (21)	15 (100)
M. simiae	15							3 (20)	4 (47)	6 (87)	2 (100)
M. terrae or M. nonchromogenicum	11			2 (18)			1 (27)	1 (36)	4 (73)	2 (91)	1 (100)
M. triplex	10			2 (20)	1 (30)	4 (70)	1 (80)	1 (90)	1 (100)

^aOnly species with 10 or more isolates are included.

^bThe three lowest MICs reflect different lot numbers of panels used.

^cTotal, 322.