title: Zonal effects in the lysis of Staphylococcus aureus by penicillin on agar surfaces.
mesh_terms: D000362:Agar; D001433:Bacteriolysis; D004305:Dose-Response Relationship, Drug; D008712:Methicillin / Q000494:pharmacology; D010406:Penicillins / Q000494:pharmacology*; D013210:Staphylococcus / Q000187:drug effects*
chemical_list: D010406:Penicillins; D000362:Agar; D008712:Methicillin