Utility of Raised Adenosine Deaminase Activity in Cerebrospinal Fluid in the Diagnosis of Tuberculous Meningitis in Children
Journal Title: Scholars Journal of Applied Medical Sciences - Year 2018, Vol 6, Issue 2
Abstract
Abstract: The diagnosis of tuberculous meningitis cannot be made or excluded on the basis of clinical findings. Definite laboratory diagnosis is cumbersome and time consuming. Delay in diagnosis and institution of proper treatment is directly related to poor outcome and squamae. So we have to search for an early diagnostic marker of tuberculous meningitis. Adenosine deaminase activity (ADA) was estimated in cerebrospinal fluid (CSF) in addition to routine CSF analysis. We have selected 32 patients of tuberculous meningitis (TBM), 7 patients of partially treated pyomeningitis (PTM), 10 patients aseptic meningitis (AM) and 13 patients pyogenic meningitis (PM). Mean ADA levels in CSF of TBM patients were higher (15.42 U/L) as compared to 7.21 U/L, 6.41 U/L and 7.50 U/L in PTM, AM and PM respectively. ADA values were also compared with other biochemical and cytological parameters of CSF. This difference of ADA values in CSF between TBM and other types of meningitis was statistically significant (p<0.01). Also, a positive correlation of CSF-ADA was found with CSF protein level. Sensitivity and specificity of ADA levels in CSF of children to diagnose tuberculous meningitis was 75% and 90% respectively at 10 U/L cut off values. Estimation of CSF ADA can be taken as a diagnostic marker of TBM in children.
Authors and Affiliations
Arnab Biswas
Keywords
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