title: Penicillin-resistant Streptococcus pneumoniae keratitis.
mesh_terms: D000368:Aged; D006801:Humans; D007634:Keratitis / Q000382:microbiology*; D008297:Male; D010400:Penicillin G / Q000494:pharmacology; D010403:Penicillin Resistance; D013290:Streptococcal Infections / Q000382:microbiology*; D013296:Streptococcus pneumoniae / Q000187:drug effects*
chemical_list: D010400:Penicillin G