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Updated: Jul 5, 2026

Metagenomic Next-Generation Sequencing of Cerebrospinal Fluid for the Detection of Central Nervous System Pathogens
Published on: April 17, 2026
[CNS infections in immunocompetent patients]
K M Hartmann1, A Zimmer, W Reith
1Abt. für Diagnostische und Interventionelle Neuroradiologie, Radiologische Klinik, Universitätsklinikum des Saarlandes, 66421, Homburg/Saar. kirsten@hartmann-online.net
Abstract:
This article gives a review of the most frequent infective agents reasonable for CNS infections in immunocompetent patients as well as their localisation and imaging specifications. MRI scanning is the gold standard to detect inflammatory conditions in the CNS. Imaging can be normal or nonspecifically altered although the infection is culturally or bioptically proven. There are no pathognomonic, pathogen-specific imaging criteria. The localization and dimension of the inflammation depends on the infection pathway.
Insights
This review covers common infectious agents causing central nervous system (CNS) infections in immunocompetent individuals. It highlights that while MRI is key for detecting CNS inflammation, imaging findings are often non-specific.
Area of Science:
- Neurology
- Infectious Diseases
- Radiology
Context:
- Central nervous system (CNS) infections pose diagnostic challenges.
- Immunocompetent patients present unique infectious profiles.
- Accurate diagnosis relies on integrating clinical, microbiological, and imaging data.
Purpose:
- To review common infectious agents responsible for CNS infections in immunocompetent patients.
- To correlate infectious agents with their typical CNS localization and imaging features.
- To emphasize the role and limitations of Magnetic Resonance Imaging (MRI) in diagnosing CNS infections.
Summary:
- The review details frequent infective agents causing CNS infections in immunocompetent hosts.
- It discusses the localization and imaging specifications of these infections.
- Magnetic Resonance Imaging (MRI) is the gold standard for detecting CNS inflammation, but findings can be normal or non-specific, lacking pathogen-specific criteria.
Impact:
- Provides clinicians with a guide to identifying common CNS pathogens in immunocompetent patients.
- Highlights the importance of considering infection pathways in interpreting imaging findings.
- Underscores the need for a comprehensive diagnostic approach beyond imaging alone.
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