PMID: 6535652Feb 1, 1984Paper

In vitro susceptibility of Clostridium difficile isolates to 12 antimicrobial agents

Chemioterapia : International Journal of the Mediterranean Society of Chemotherapy
P GianfrilliM Occhionero

Abstract

The "in vitro" susceptibility of 48 strains of "Clostridium difficile" to 12 antimicrobial agents was determined by agar dilution method. All isolates were susceptible to ampicillin, metronidazole, piperacillin, vancomycin and N-formimidoylthienamycin, resistant or intermediate to the new cephalosporins: cefoxitin, cefotaxime and moxalactam. For clindamycin, the MIC distribution appeared to be bimodal with 41.7% of the strains susceptible to 8 micrograms/ml and 58.3% resistant to 128 micrograms/ml; 90% of these strains were also resistant to erythromycin, tetracycline and chloramphenicol. The percentage of resistant strains in the isolates from patients with pseudomembranous colitis is significantly higher than in the isolates from patients with antibiotic-associated colitis.

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