TABLE 1.

Survival of wild-type M. abscessus ATCC 19977 and M. smegmatis mc²155 in a 2-fold dilution series of antibiotics in Middlebrook 7H9 medium

Antibiotic	MIC99 (μg/ml)a
	M. abscessus WT	M. smegmatis WT
Erythromycin	0.5–1	2.5
Clarithromycin	0.25–0.5	0.25–0.5
Amikacin	8	0.625
Spectinomycin	>256	50
Tetracycline	16	0.2
Streptomycin	16	0.3

^aMIC₉₉, the minimum concentration of antibiotic required to inhibit 99% of growth.