title: Pathogenicity of H. parainfluenzae.
mesh_terms: D000667:Ampicillin / Q000627:therapeutic use; D002675:Child, Preschool; D006190:Haemophilus / Q000302:isolation & purification / Q000472:pathogenicity*; D006801:Humans; D008297:Male; D008583:Meningitis, Haemophilus / Q000188:drug therapy / Q000382:microbiology*
chemical_list: D000667:Ampicillin