title: Resistance of viridans streptococci to penicillin.
mesh_terms: D003470:Culture Media; D010400:Penicillin G / Q000494:pharmacology*; D010403:Penicillin Resistance; D013291:Streptococcus / Q000187:drug effects* / Q000254:growth & development
chemical_list: D003470:Culture Media; D010400:Penicillin G