title: A study on the etiology of purulent meningitis.
mesh_terms: D000367:Age Factors; D001419:Bacteria / Q000302:isolation & purification; D006801:Humans; D008581:Meningitis / Q000175:diagnosis / Q000382:microbiology*; D008583:Meningitis, Haemophilus / Q000175:diagnosis*; D008585:Meningitis, Meningococcal / Q000175:diagnosis*; D008586:Meningitis, Pneumococcal / Q000175:diagnosis*