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. 2012 Mar;56(3):1613-5.
doi: 10.1128/AAC.05655-11. Epub 2011 Dec 19.

In vitro activities of CB-183,315, vancomycin, and metronidazole against 556 strains of Clostridium difficile, 445 other intestinal anaerobes, and 56 Enterobacteriaceae species

Diane M Citron  1 , Kerin L Tyrrell, C Vreni Merriam, Ellie J C Goldstein
Affiliations

In vitro activities of CB-183,315, vancomycin, and metronidazole against 556 strains of Clostridium difficile, 445 other intestinal anaerobes, and 56 Enterobacteriaceae species

Diane M Citron et al. Antimicrob Agents Chemother. 2012 Mar.

Abstract

MICs of CB-183,315, a novel lipopeptide antibiotic, vancomycin, and metronidazole were determined for intestinal anaerobes and Enterobacteriaceae. The MIC(90)s for Gram-negative anaerobes were >8,192, 8,192, and 4 μg/ml for CB-183,315, vancomycin, and metronidazole, respectively. Against Enterobacteriaceae, the MIC(90)s were >8,192 μg/ml, 1,024 μg/ml, and 1,024 μg/ml, respectively. The CB-183,315 MIC(90) for Clostridium difficile was 0.5 μg/ml. Its lack of activity against normal fecal organisms makes it a promising new agent for treating C. difficile.

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