[Assessment of etiological diagnostics in adults with aseptic encephalomeningitis--own material].

OBJECTIVE: Epidemiologic, etiologic and clinical assessment of patients with aseptic encephalomeningitis (AE); evaluation of efficacy of diagnostic process.

METHODS: From January 1996 to August 2002, in seventy seven patients AE was diagnosed on the basis of lymphocytic predominance in cerebrospinal fluid (CSF) and negative culture of CSF. Analysis comprised: etiology, course of the disease and spectrum of used diagnostic tests.

RESULTS: In 48/77 patients (62.3%) etiology was not identified. In 8/77 patients (10.3%) herpes simplex encephalitis was diagnosed, in 7/77 (9.1%) neuroborreliosis, in 6/77 (7.8%) tuberculosis encephalitis, in 3/77 (3.9%) listerial meningitis, in 3/77 (3.9%) mumps meningitis, and in remaining 2/77 (2.6%) tick-borne encephalitis. The incidence of AE was higher in summer (42.9%) than in any other season. In 14/77 patients (18.2%) the episode of unconsciousness occurred in the course of the disease. In 6 of these 14 patient etiology was unknown, in 4 tuberculosis AE, in 2 herpes simplex encephalitis and in 2 neuroborreliosis was diagnosed. In 7 of 77 patients (9.0%) et least one episode of convulsions occurred.

CONCLUSIONS: In 62.3% of patients etiology remained unknown due to clinical and economic reasons. Aseptic encephalomeningitis in adults not always mean the viral etiology and mild course of the disease.