Meningococcal infection.
D002555:Cerebrospinal Fluid / Q000382:microbiology; D004334:Drug Administration Schedule; D006801:Humans; D007223:Infant; D008585:Meningitis, Meningococcal / Q000188:drug therapy*; D010400:Penicillin G / Q000008:administration & dosage / Q000627:therapeutic use
D010400:Penicillin G