title: Effects of some cephalosporins and ampicillin on some beta-lactamase- and non-beta-lactamase-producing strains of gram-negative bacteria.
mesh_terms: D000667:Ampicillin / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects*; D001433:Bacteriolysis; D002470:Cell Survival; D002509:Cephaloridine / Q000494:pharmacology*; D002511:Cephalosporins / Q000494:pharmacology*; D003023:Cloxacillin / Q000494:pharmacology; D004755:Enterobacteriaceae / Q000187:drug effects / Q000201:enzymology; D004926:Escherichia coli / Q000187:drug effects / Q000201:enzymology; D007709:Klebsiella / Q000187:drug effects / Q000201:enzymology; D008712:Methicillin / Q000494:pharmacology; D009154:Mutation; D010403:Penicillin Resistance; D010405:Penicillinase / Q000096:biosynthesis; D011511:Proteus / Q000187:drug effects / Q000201:enzymology
chemical_list: D002511:Cephalosporins; D000667:Ampicillin; D010405:Penicillinase; D002509:Cephaloridine; D003023:Cloxacillin; D008712:Methicillin