review of records of patients aged 65 years and older admitted to the mount sinai hospital , new york , ny , during the period from 1970 through 1985 revealed 57 episodes of central nervous system infections , including 50 meningitides , 5 brain abscesses , 1 subdural empyema , and 1 epidural abscess .
C0007684
of central nervous system infections
C0025289
meningitides