title: Letter: Cavitary pneumonia in a 76-year-old woman.
mesh_terms: D000368:Aged; D000667:Ampicillin / Q000494:pharmacology / Q000627:therapeutic use; D005260:Female; D006801:Humans; D008169:Lung Abscess / Q000188:drug therapy*; D010400:Penicillin G / Q000494:pharmacology / Q000627:therapeutic use; D010403:Penicillin Resistance; D010406:Penicillins / Q000494:pharmacology / Q000627:therapeutic use; D011008:Pneumococcal Infections / Q000188:drug therapy*; D011014:Pneumonia / Q000188:drug therapy*; D013296:Streptococcus pneumoniae / Q000187:drug effects*
chemical_list: D010406:Penicillins; D000667:Ampicillin; D010400:Penicillin G