TABLE 1.

AMK and CLA resistance of all MABC isolates^a

Genotype	Drug	MIC range (μg/mL)	MIC50	MIC90	No. of strains distributed at the MIC (μg/mL)
					0.015	0.03	0.06	0.12	0.25	0.5	1	2	4	8	16	32	64	128	256
MAA	AMK	1–128	2	32	0	0	0	0	0	0	26	16	10	8	6	5	0	5	0
	CLA (Day 3)	0.06–16	0.12	1	0	0	25	17	14	10	6	3	0	0	1 b	0	0	0	0
	CLA (Day 14)	0.06–32	8	32	0	0	5	6	6	8	5	4	3	6	13	19	0	0	0
MAM	AMK	1–64	2	16	0	0	0	0	0	0	8	6	4	3	4	1	1	0	0
	CLA (Day 3)	0.06–32	0.12	0.25	0	0	10	7	6	2	1	0	0	0	0	1 b	0	0	0
	CLA (Day 14)	0.06–2	0.25	0.5	0	0	3	7	10	3	2	1	0	0	0	0	0	0	0
Total	AMK	1–128	2	32	0	0	0	0	0	0	34	22	14	11	10	6	1	5	0
	CLA (Day 3)	0.06–32	0.12	0.5	0	0	35	24	20	12	7	3	0	0	1 b	1 b	0	0	0
	CLA (Day 14)	0.06–32	1	32	0	0	8	13	16	11	7	5	3	6	13	19	0	0	0

^aCLA = clarithromycin; AMK = amikacin; MABC = Mycobacterium abscessus complex; MAA = M. abscessus subsp. abscessus; MAM = M. abscessus subsp. massiliense. Bold font indicates the drug-resistant strain.

^bIndicates inducible resistance.