title: Novel resistance selected by the new expanded-spectrum cephalosporins: a concern.
mesh_terms: D001424:Bacterial Infections / Q000188:drug therapy; D002440:Cefoxitin / Q000494:pharmacology; D002511:Cephalosporins / Q000494:pharmacology* / Q000627:therapeutic use; D004352:Drug Resistance, Microbial; D006801:Humans; D001618:beta-Lactamases / Q000378:metabolism
chemical_list: D002511:Cephalosporins; D002440:Cefoxitin; D001618:beta-Lactamases