Abstract:
BACKGROUND:The differential diagnosis between bacterial and viral meningitis is not easy in some cases. Cerebrospinal fluid (CSF) analysis is essential for establishing this diagnosis. The objectives were to quantitate lactic acid (LA) concentrations in bacterial and viral meningitis, and other central nervous system (CNS) diseases in order to evaluate the diagnostic utility of CSF LA for discriminating bacterial from viral meningitis. METHODS:CSF LA was measured in 139 CSF samples from seven groups: viral meningitis with classic CSF; suspicion of viral meningitis with neutrophils in CSF; bacterial meningitis; non-infectious neurological diseases; chronic meningitis; traumatic lumbar puncture (LP) and normal CSF. RESULTS:CSF LA was higher in bacterial meningitis 8.7 + 5.4 mmol/L compared with viral meningitis (1.9 + 0.6) and the other groups (p < 0.0001). CSF LA in the groups with viral meningitis was not different compared to groups with non-infectious CNS diseases and chronic meningitis. The ability of CSF LA to discriminate bacterial from viral meningitis showed a sensitivity of 80% and specificity of 97%, positive predictive value (PPV) of 94%, and negative predictive value (NPV) of 89%. CONCLUSIONS:CSF LA is a powerful test to discriminate bacterial from viral meningitis with high sensitivity, specificity and predictive values. CSF LA can help in the cases with diagnostic uncertainty.
journal_name
Clin Chem Lab Medjournal_title
Clinical chemistry and laboratory medicineauthors
de Almeida SM,Faria FL,de Goes Fontes K,Buczenko GM,Berto DB,Raboni SM,Vidal LR,Nogueira MBdoi
10.1515/CCLM.2009.160subject
Has Abstractpub_date
2009-01-01 00:00:00pages
755-61issue
6eissn
1434-6621issn
1437-4331journal_volume
47pub_type
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