title: New light on penicillin.
mesh_terms: D004653:Empyema / Q000188:drug therapy; D006801:Humans; D010403:Penicillin Resistance; D010406:Penicillins / Q000494:pharmacology / Q000627:therapeutic use*; D013203:Staphylococcal Infections / Q000188:drug therapy
chemical_list: D010406:Penicillins