Abstract

The in vitro activities of temafloxacin, ciprofloxacin, and ofloxacin against gram-negative bacteria are compared. The 90% minimal inhibitory concentrations (MIC 90s) of temafloxacin for respiratory pathogens such as Haemophilus influenzae, Moraxella catarrhalis, Neisseria meningitidis, Bordetella pertussis, and Legionella pneumophila are ≤0.06 μg/mL. Temafloxacin is also active against bacterial agents of sexually transmitted diseases, including Neisseria gonorrhoeae (MIC 90 ≤0.015 μg/mL) and Chlamydia trachomatis (MIC 90 0.25 μg/mL). For strains of Enterobacteriaceae, Campylobacter, Vibrio, Aeromonas, and Acinetobacter, temafloxacin is generally inhibitory at ≤0.5 μg/mL. The MIC 90 of temafloxacin for Pseudomonas aeruginosa is higher than that of ciprofloxacin, approximately 4 μg/mL versus 0.5 μg/mL. This activity, combined with its pharmacokinetic characteristics, should make temafloxacin an effective antimicrobial agent against infections caused by gram-negative bacteria.

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