title: Letter: Ampicillin-resistant Haemophilus influenzae meningitis.
mesh_terms: D000667:Ampicillin / Q000494:pharmacology* / Q000627:therapeutic use; D006193:Haemophilus influenzae / Q000187:drug effects*; D006801:Humans; D008583:Meningitis, Haemophilus / Q000188:drug therapy*; D010403:Penicillin Resistance
chemical_list: D000667:Ampicillin