Comparative in vitro activity of moxifloxacin against Gram-positive clinical isolates
Abstract
The in vitro activity of moxifloxacin was compared with that of 15 antibacterial agents against 513 Gram-positive microorganisms. The MIC(90) (mg/L) of moxifloxacin was 0.06 for quinolone-susceptible Staphylococcus aureus and Staphylococcus epidermidis, 0.12 for Streptococcus pyogenes and Streptococcus agalactiae; 0.25 for Streptococcus pneumoniae, Streptococcus mitis, Streptococcus bovis, Streptococcus anginosus and Actinomyces pyogenes; 0.5 for Streptococcus sanguis and Listeria monocytogenes, 2 for Corynebacterium jekeium and Bifidobacterium bivius. Over 50% of Enterococcus faecalis, Enterococcus faecium, quinolone-resistant staphylococci, Nocardia steroides and Clostridium difficile were susceptible to 2 mg/L moxifloxacin. Moxifloxacin and trovafloxacin demonstrated comparably high activity towards Gram-positive cocci; moxifloxacin and clinafloxacin were most active against Gram-positive bacilli.
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