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  • Title: Beta-Lactamase activity in strains of Bacteroides melaninogenicus and Bacteroides oralis.
    Author: Salyers AA, Wong J, Wilkins TD.
    Journal: Antimicrob Agents Chemother; 1977 Jan; 11(1):142-6. PubMed ID: 13705.
    Abstract:
    beta-Lactamase from strains of Bacteroides melaninogenicus and Bacteroides oralis hydrolyzed penicillin more rapidly than ampicillin or carbenicillin. Cephalothin and a chromogenic cephalosporin (87/312) were also hydrolyzed by the enzyme. Activity was found only in beta-lactam-resistant strains, but there was considerable variation in activity among strains having the same minimal inhibitory concentrations of antibiotic. beta-Lactamase activity was cell bound and appeared to be tightly associated with the cell envelope since detergents were required to elute this activity.
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