Comparative in vitro activity of BAY 12-8039 and five other antimicrobial agents against anaerobic bacteria

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Abstract
The in vitro activity of BAY 12-8039 against 360 anaerobic clinical isolates was determined by the agar dilution method and compared to that of five other antimicrobial agents. BAY 12-8039 and imipenem were the most active agents tested. The following MIC90 values were determined for BAY 12-8039Peptostreptococcus spp. (50 isolates), 1 mg/l;Propionibacterium acnes (30 isolates), 0.25 mg/l;Clostridium perfringens (30 isolates), 0.5 mg/l;Clostridium difficile (50 isolates), 2 mg/l;Bacteroides fragilis (50 isolates), 1 mg/l;non- fragilis Bacteroides, Porphyromonas, andPrevotella spp. (100 isolates), 2 mg/l; andFusobacterium spp. (50 isolates), 0.25 mg/l. The results of the present study show that BAY 12-8039 may be useful in the treatment and prophylaxis of anaerobic infections.