title: Bacterial endocarditis due to a penicillin-tolerant group C streptococcus.
mesh_terms: D000368:Aged; D004697:Endocarditis, Bacterial / Q000209:etiology*; D006801:Humans; D008297:Male; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance; D010406:Penicillins / Q000494:pharmacology*; D013290:Streptococcal Infections; D013291:Streptococcus / Q000187:drug effects*
chemical_list: D010406:Penicillins