title: Letter: Otitis media due to ampicillin-resistant Haemophilus influenzae.
mesh_terms: D000667:Ampicillin / Q000494:pharmacology* / Q000627:therapeutic use; D002675:Child, Preschool; D006192:Haemophilus Infections / Q000382:microbiology*; D006193:Haemophilus influenzae / Q000187:drug effects*; D006801:Humans; D008297:Male; D010033:Otitis Media / Q000188:drug therapy / Q000382:microbiology*; D010403:Penicillin Resistance
chemical_list: D000667:Ampicillin