Related Experiment Video
Updated: Jul 18, 2026

Metagenomic Next-Generation Sequencing of Cerebrospinal Fluid for the Detection of Central Nervous System Pathogens
Published on: April 17, 2026
CSF markers for diagnosis of bacterial meningitis in neurosurgical postoperative patients
Wagner Malagó Tavares1, Andre Guelman Machado, Hamilton Matushita
1Division of Neurosurgery, University of São Paulo, São Paulo, SP, Brazil. wagnermt@hotmail.com
Objective:
To evaluate the diagnostic usefulness of cerebral spinal fluid (CSF) cellularity, protein, neutrophils, glucose and lactate for detection of postoperative bacterial meningitis.
Method:
This prospective study was conducted in 28 postoperative neurosurgical patients from 2002 to 2005 at University of São Paulo. The CSF markers were plotted in a receiver operating characteristic (ROC) curve to evaluate their accuracy.
Results:
Based on the area under ROC curve CSF glucose, cellularity, and lactate were considered good tests. Polymorphonuclear and protein did not achieve enough accuracy to be used clinically.
Conclusion:
The CSF glucose, lactate, and cellularity can be used for the diagnosis of bacterial meningitis. Moreover, it can be helpful to differentiate bacterial from aseptic meningitis.
Insights
Cerebrospinal fluid (CSF) glucose, cellularity, and lactate levels are effective for diagnosing postoperative bacterial meningitis. These markers can help distinguish bacterial from aseptic meningitis in neurosurgical patients.
Area of Science:
- Neurosurgery
- Infectious Disease
- Clinical Diagnostics
Background:
- Postoperative bacterial meningitis is a serious complication following neurosurgery.
- Accurate and timely diagnosis is crucial for effective treatment and patient outcomes.
Purpose of the Study:
- To assess the diagnostic utility of cerebrospinal fluid (CSF) markers for detecting postoperative bacterial meningitis.
- To evaluate the accuracy of CSF cellularity, protein, neutrophils, glucose, and lactate levels.
Main Methods:
- A prospective study involving 28 postoperative neurosurgical patients.
- Analysis of CSF markers including cellularity, protein, neutrophils, glucose, and lactate.
- Utilized receiver operating characteristic (ROC) curves to determine diagnostic accuracy.
Main Results:
- CSF glucose, cellularity, and lactate demonstrated good diagnostic accuracy based on ROC curve analysis.
- Polymorphonuclear count and protein levels did not show sufficient accuracy for clinical use.
- CSF glucose, cellularity, and lactate are identified as valuable diagnostic indicators.
Conclusions:
- CSF glucose, lactate, and cellularity are reliable markers for diagnosing bacterial meningitis.
- These CSF markers can aid in differentiating between bacterial and aseptic meningitis.
- The findings support the clinical application of these CSF parameters in neurosurgical patients.
Related Concept Videos
Viral Meningitis
Bacterial Meningitis I: Introduction
Bacterial Meningitis
Bacterial Meningitis II: Pathophysiology
Cryptococcal Meningitis
Cerebrospinal Fluid
CSF Production
CSF is produced mainly in the choroid plexus, a network of capillaries and ependymal cells located within the ventricular system of the brain.

