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  • Title: [Antibacterial activity of tosufloxacin against major organisms detected from patients with respiratory infections].
    Author: Kobayashi I, Matsuzaki K, Omika K, Hasegawa M, Sato Y.
    Journal: Jpn J Antibiot; 2007 Apr; 60(2):98-106. PubMed ID: 17612257.
    Abstract:
    We determined the susceptibility of bacteria which were isolated from the patients with respiratory infections between January and October 2005, to tosufloxacin and other fluoroquinolones. A total of 900 isolate including 300 Streptococcus pneumoniae, 100 Streptococcus pyogenes, 100 Moraxella catarrhalis, 200 Haemophilus influenzae, 100 Klebsiella pneumoniae and 100 Pseudomonas aeruginosa were tested. Tosufloxacin, gatifloxacin, levofloxacin, moxifloxacin, ciprofloxacin and prulifloxacin were used as the test antimicrobials. Tosufloxacin, gatifloxacin and moxifloxacin were potent antibiotics tested for the antibacterial activity against Streptococcus including penicillin-resistant S. pneumoniae; the MIC90 were 0.12-0.5/ micromL. Fluoroquinolones exerted the potent antibacterial activity against M. catarrhalis and H. influenzae; the MIC90 of fluoroquinolones tested were < or =0.06 microg/mL. Tosufloxacin, ciprofloxacin and prulifloxacin showed to be more active against K. pneumoniae and P. aeruginosa, but parts of some strains were resistant. These results indicate that tosufloxacin has the potent antibacterial activity against major organisms detected from patients with respiratory infections. Since it was approved in 1990, tosufloxacin was considered to be useful as a therapeutic antimicrobial for the treatment of respiratory infections.
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