Transfer of beta-lactamase-associated cefoxitin resistance in Bacteroides fragilis. 1986

G J Cuchural, and F P Tally, and J R Storey, and M H Malamy

A cefoxitin-resistant Bacteroides fragilis isolate, TAL 4170, which inactivates cefoxitin, was able to transfer beta-lactamase-mediated cefoxitin resistance to a susceptible B. fragilis recipient. Cefoxitin-resistant transconjugants acquired a new beta-lactamase with a pI of 8.1 and were able to inactivate cefoxitin and retransfer cefoxitin resistance. No plasmids were detected in the donor or transconjugants.

UI MeSH Term Description Entries
D007525 Isoelectric Focusing Electrophoresis in which a pH gradient is established in a gel medium and proteins migrate until they reach the site (or focus) at which the pH is equal to their isoelectric point. Electrofocusing,Focusing, Isoelectric
D010403 Penicillin Resistance Nonsusceptibility of an organism to the action of penicillins. Penicillin Resistances,Resistance, Penicillin,Resistances, Penicillin
D002440 Cefoxitin A semisynthetic cephamycin antibiotic resistant to beta-lactamase. Cefoxitin Sodium,MK-306,Mefoxin,Mefoxitin,Méfoxin,MK 306,MK306,Sodium, Cefoxitin
D000667 Ampicillin Semi-synthetic derivative of penicillin that functions as an orally active broad-spectrum antibiotic. Penicillin, Aminobenzyl,Amcill,Aminobenzylpenicillin,Ampicillin Sodium,Ampicillin Trihydrate,Antibiotic KS-R1,Omnipen,Pentrexyl,Polycillin,Ukapen,Aminobenzyl Penicillin,Antibiotic KS R1,KS-R1, Antibiotic,Sodium, Ampicillin,Trihydrate, Ampicillin
D001441 Bacteroides fragilis Gram-negative bacteria occurring in the lower intestinal tracts of man and other animals. It is the most common species of anaerobic bacteria isolated from human soft tissue infections.
D001618 beta-Lactamases Enzymes found in many bacteria which catalyze the hydrolysis of the amide bond in the beta-lactam ring. Well known antibiotics destroyed by these enzymes are penicillins and cephalosporins. beta-Lactamase,beta Lactamase,beta Lactamases

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