Recurrent bacterial meningitis: a 6-year experience in adult patients.

Ten adult patients with recurrent bacterial meningitis (RBM) of 22 episodes were diagnosed and treated at the Dicle University Hospital from January 1990 to December 1995. Apart from 22 episodes of RBM these patients had an additional 25 episodes treated at other hospitals. The RBM attacks developed after closed head trauma in four patients, asplenia and chronic otitis media in one patient, chronic otitis media and oto-mastoiditis in one patient, chronic maxillary sinusitis in one patient, chronic mastoiditis in one patients, and suppurative foci of facial bones caused by shrapnel pieces and no predisposing condition in one patient. In 10 RBM episodes, Streptococcus pneumoniae was isolated from cerebrospinal fluid (CSF) and/or blood culture, and in one episode Proteus vulgaris was isolated from CSF and otitis media suppuration. In the four episodes both cultures were negative, but direct microscopy showed Gram-positive diplococci on Gram-staining. Three of the patients died from meningitis-related complications.