Journal
EUROPEAN NEUROLOGY
Volume 66, Issue 3, Pages 128-132Publisher
KARGER
DOI: 10.1159/000330566
Keywords
Bacterial meningitis; Differential diagnosis; CSF-S100B; Tau protein; Cerebrospinal fluid; Sensitivity; Specificity
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Background: Patients with meningitis are often difficult to classify into bacterial (BM) or benign viral (VM) meningitis. To facilitate the differential diagnosis, S100B and Tau protein in the cerebrospinal fluid (CSF) were measured and compared with standard laboratory parameters. Methods: S100B(CSF), Tau(CSF), and routine parameters (CSF leukocyte count, protein(CSF), lactate(CSF), serum C-reactive protein, blood leukocyte count and body temperature) were analyzed in 33 patients with microbiologically confirmed BM and in 19 with VM. Their classification accuracy, sensitivity and specificity were studied by receiver operating characteristic (ROC) curves. Results: S100B CSF concentrations were higher in BM than in VM patients (p = 0.03) and showed a promising accuracy (90%) for the differential diagnosis of BM versus VM. Its discriminative properties were comparable to routine parameters. Of all parameters, S100B CSF showed the highest specificity (100%) with an optimal cut-off of 3.1 ng/ml. Tau(CSF) concentrations were useless for the discrimination (p = 0.64). Conclusions: In contrast to Tau(CSF), S100B(CSF) concentrations >= 3.1 ng/ml are promising to discriminate bacterial from viral meningitis. Copyright (C) 2011 S. Karger AG, Basel
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