title: Resistance and cross-resistance of Staphylococcus aureus, Escherichia coli, and Aerobacter species to cephalosporins and semisynthetic penicillins.
mesh_terms: D002511:Cephalosporins / Q000494:pharmacology*; D004754:Enterobacter / Q000187:drug effects*; D004926:Escherichia coli / Q000187:drug effects*; D066298:In Vitro Techniques; D010403:Penicillin Resistance; D010406:Penicillins / Q000494:pharmacology*; D013210:Staphylococcus / Q000187:drug effects*
chemical_list: D002511:Cephalosporins; D010406:Penicillins