We determined the minimum inhibitory concentrations (MIC) for nine antimicrobial agents for 250 clinical isolates of Bacteroides species collected from nine medical centres across the United States. Chloramphenicol and metronidazole were highly active with no resistance found. Cefoxitin displayed the best activity of the β -lactam antibiotics. Moxalactam and piperacillin had good activity. Cefoperazone and cefotaxime were much less active. Clindamycin resistance of 7% is higher when compared to some earlier studies. Tetracycline continues to have a high rate of resistance.
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Cuchural et al. (1981) studied this question.
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