Journal
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
Volume 50, Issue 1, Pages 148-155Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AAC.50.1.148-155.2006
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The in vitro activity of moxifloxacin against 923 recent anaerobic isolates obtained from pretreatment cultures in patients with complicated intra-abdominal infections was studied using the CLSI M11-A-6 agar dilution method. Moxifloxacin was active against 87% (96 of 110) Bacteroides fragilis strains at <= 1 mu g/ml and 87% (79 of 90) B. thetaiotaomicron strains at <= 2 mu g/ml. Species variation was seen, with B. uniformis, B. vulgatus, Clostridium clostridioforme, and C. symbiosum being least susceptible and accounting for most of the resistant isolates; excluding the aforementioned four resistant species, 86% (303 of 363) of Bacteroides species isolates and 94% (417 of 450) of all other genera and species were susceptible to <= 2 mu g/ml of moxifloxacin. Overall, moxifloxacin was active against 763 of 923 (83%) of strains at <= 2 mu g/ml, supporting its use as a monotherapy for some community-acquired intra-abdominal infections.
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