Meningococcus meningitis; three cases resistant to penicillin.
D006801:Humans; D008581:Meningitis; D008585:Meningitis, Meningococcal / Q000628:therapy*; D009345:Neisseria meningitidis; D010406:Penicillins
D010406:Penicillins
MENINGITIS, MENINGOCOCCIC/therapy