title: Antibiotic studies on beta hemolytic streptococci; penicillin resistance acquired by group B organisms.
mesh_terms: D000900:Anti-Bacterial Agents; D006801:Humans; D010403:Penicillin Resistance; D010406:Penicillins; D013290:Streptococcal Infections; D013291:Streptococcus
chemical_list: D000900:Anti-Bacterial Agents; D010406:Penicillins
keywords: ANTIBIOTICS; PENICILLIN/resistance; STREPTOCOCCI/hemolytic