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Antimicrobial activities of sitafloxacin, moxifloxacin and clarithromycin against M. abscessus subsp. abscessus ATCC19977 growing intracellularly. Antibiotics at 0.2 (A), 1 (B), 5 (C), and10 (D) mg/L final concentrations were added to cultures of M. abscessus-infected macrophages. CFUs were quantified after 4, 24, and 48 h incubation. Ctrl, control; STFX, sitafloxacin; MFX, moxifloxacin; CLA, clarithromycin.
