Is Cerebrospinal Fluid C-reactive Protein a Better Tool than Blood C-reactive Protein in Laboratory Diagnosis of Meningitis in Children?
Journal Title: Sultan Qaboos University Medical Journal - Year 2013, Vol 13, Issue 1
Abstract
Objectives: Tis study aimed to test whether C-reactive protein (CRP) measurement could differentiate between different types of meningitis and become a routine test. Methods: A prospective study included 140 children admitted to Manipal Teaching Hospital, Pokhara, Nepal, between July 2009 and June 2011. Te subjects had a blood test and detailed cerebrospinal fluid (CSF) analysis, including blood and CSF CRP levels. Results: Of those admitted, 31.1% had pyogenic meningitis (PM), 26.2% partially treated meningitis (PPM), 33% viral meningitis (VM), and 9.7% tubercular meningitis (TBM), with 26.4% controls. Organisms were isolated in 12.5% of the cases by blood culture and 25% of cases through CSF culture. Blood CRP was positive in all groups, with the highest values in PM (53.12 ± 28.88 mg/dl) and PPM (47.55 ± 34.34 mg/dl); this was not statistically signifcant (P = 0.08). Te CSF CRP levels were signifcantly higher (P <0.001) in PM (45.75 ± 28.50 mg/dl) and PPM (23.11 ± 23.98 mg/dl). Te sensitivity and specifcity of blood CRP was 90.62%, 88.88%, 64.7%, 70% and 32.4%, 30.97%, 24.52%, 26.12% and that of CSF CRP was 96.87%, 66.66%, 20.58%, 10% and 74.73%, 63.71%, 50.94%, 55.35% for PM, PPM, VM and TBM, respectively. Conclusion: Because of its high sensitivity, both CSF CRP and blood CRP can be used to screen for bacterial meningitis (both PM and PPM). CSF CRP screening yielded results with a higher specifcity than blood CRP; hence, it can be a supportive test along with CSF cytology, biochemistry, and microbiology for diagnosing meningitis.
Authors and Affiliations
Kalpana K. Malla| Departments of 1Pediatrics, Manipal College of Medical Sciences, Pokhara, Nepal, Tejesh Malla| Departments of 1Pediatrics, Manipal College of Medical Sciences, Pokhara, Nepal, K. Seshagiri Rao| Departments of 1Pediatrics, Manipal College of Medical Sciences, Pokhara, Nepal, Sahisnuta Basnet| Departments of 1Pediatrics, Manipal College of Medical Sciences, Pokhara, Nepal, Ravi Shah| Departments of 1Pediatrics, Manipal College of Medical Sciences, Pokhara, Nepal
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