Table 2.

Survival of wild-type M. abscessus ATCC19977, ΔMab_HflX, and complemented strains in a 2-fold dilution series of antibiotics in Middlebrook 7H9/OADC medium

Antibiotic	Minimum Inhibitory Concentration (μg/mL)
	WT Mab	ΔMab_hflX	ΔMab_hflX + phsp-hflX-ΔNTD	ΔMab_hflX + phsp-hflX-ΔCTD
Erythromycin	2	0.25	0.5	0.25
Clarithromycin	1	0.125	0.125	0.125
Azithromycin	8	2	2	2
Clindamycin	200	50	50	50

The minimum concentration of antibiotic required to inhibit 99% of growth after 72 h is shown. Minimum inhibitory concentration values are representative of 3 independent assays.