title: Letter: Ampicillin-resistand Haemophiilus influenzae meningitis.
mesh_terms: D000284:Administration, Oral; D000667:Ampicillin / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D002701:Chloramphenicol / Q000008:administration & dosage / Q000627:therapeutic use; D006193:Haemophilus influenzae / Q000187:drug effects*; D006801:Humans; D007273:Injections, Intramuscular; D007275:Injections, Intravenous; D008297:Male; D008583:Meningitis, Haemophilus / Q000188:drug therapy* / Q000382:microbiology; D010403:Penicillin Resistance
chemical_list: D002701:Chloramphenicol; D000667:Ampicillin