title: Bacterial resistance to penicillins and cephalosporins.
mesh_terms: D000900:Anti-Bacterial Agents; D001419:Bacteria / Q000145:classification / Q000187:drug effects / Q000201:enzymology; D002463:Cell Membrane Permeability; D002511:Cephalosporins / Q000494:pharmacology*; D055598:Chemical Phenomena; D002621:Chemistry; D004352:Drug Resistance, Microbial; D004361:Drug Tolerance; D004926:Escherichia coli / Q000201:enzymology; D005838:Genotype; D010403:Penicillin Resistance; D010405:Penicillinase / Q000032:analysis / Q000494:pharmacology; D010641:Phenotype; D013045:Species Specificity; D013210:Staphylococcus / Q000201:enzymology
chemical_list: D000900:Anti-Bacterial Agents; D002511:Cephalosporins; D010405:Penicillinase