In vitro activities of BAY Y3118, ciprofloxacin, ofloxacin, and fleroxacin against gram-positive and gram-negative pathogens from respiratory tract and soft tissue infections

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Abstract
BAY Y3118 was highly active against Moraxella catarrhalis, Haemophilus influenzae, Legionella pneumophila, Escherichia coli, Klebsiella pneumoniae, Staphylococcus aureus (except quinolone-resistant, methicillin-resistant S. aureus), Staphylococcus epidermidis, Streptococcus pyogenes, Streptococcus agalactiae, and Streptococcus pneumoniae (MIC for 90% of strains tested [MIC90], 0.063 micrograms/ml). For Enterococcus faecalis and Corynebacterium jeikeium, MIC90s were 4 and 2 micrograms/ml, respectively. BAY Y3118 was as active as ciprofloxacin against Pseudomonas aeruginosa (MIC90, 0.5 micrograms/ml) and had potent activity against Bacteroides fragilis (MIC90, 0.5 micrograms/ml).