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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 immunocompromised patients].
K M Hartmann1, M Golinski, W Reith
1Abt. für Diagnostische und Interventionelle Neuroradiologie, Radiologische Klinik, Universitätsklinikum des Saarlandes, 66421, Homburg/Saar. kirsten@hartmann-online.net
Central nervous system (CNS) infections are uncommon in healthy individuals but more prevalent in immunocompromised patients, with distinct causative agents. Current imaging techniques often show non-specific findings, highlighting the need for pathogen detection.
Area of Science:
- Neurology
- Infectious Diseases
- Radiology
Context:
- Central nervous system (CNS) infections present differently in immunocompromised versus immunocompetent hosts.
- The range of infectious agents causing CNS infections varies significantly between these patient groups.
- Radiological imaging in CNS infections often yields non-specific or inconspicuous findings, even in severe cases.
Purpose:
- To review common infectious agents responsible for CNS infections.
- To discuss characteristic imaging alterations associated with these infections.
- To evaluate the current role of radiology in diagnosing CNS infections.
Summary:
- CNS infections are rare in immunocompetent hosts but more common in immunocompromised individuals, with different pathogens involved.
- Radiological findings in CNS infections are frequently non-specific, posing diagnostic challenges.
- This review covers frequent infective agents and their associated imaging findings in CNS infections.
Impact:
- Highlights the limitations of current radiological diagnostic capabilities for CNS infections.
- Emphasizes that advanced imaging cannot replace definitive pathogen detection methods.
- Provides a review of common CNS pathogens and their imaging manifestations for clinicians and radiologists.
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