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Bacterial Meningitis I: Introduction

Bacterial Meningitis I: Introduction

Bacterial meningitis is a severe, life-threatening inflammation of the meninges, particularly the pia mater and arachnoid mater, affecting the subarachnoid space, ventricles, and cerebrospinal fluid (CSF). If untreated, it can lead to significant neurological complications or death.Causative AgentsCommon pathogens vary with age and immune status. In adults, major organisms include Streptococcus pneumoniae, Neisseria meningitidis, and Haemophilus influenzae. Streptococcus agalactiae (group B...

Bacterial Meningitis

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Bacterial meningitis is a severe infectious disease involving inflammation of the meninges, the protective membranes surrounding the brain and spinal cord. It occurs when pathogenic bacteria cross the blood–brain barrier and enter the cerebrospinal fluid. Common causative organisms include Neisseria meningitidis, Streptococcus pneumoniae, Haemophilus influenzae type b, Listeria monocytogenes, and Escherichia coli K1. The exact route of entry varies by pathogen and host condition.Routes of Entry...

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Bacterial meningitis typically begins when pathogens such as Neisseria meningitidis and Streptococcus pneumoniae colonize the nasopharynx and invade the bloodstream. This process is facilitated by bacterial virulence factors, such as polysaccharide capsules, which resist phagocytosis and complement-mediated killing. Less commonly, bacteria reach the central nervous system via contiguous spread from infections like otitis media or sinusitis, through congenital or acquired dural defects, or...

Viral Meningitis

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Cranial and Spinal Meninges

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The cranial and spinal meninges are complex protective structures surrounding the central nervous system (CNS), consisting of the brain and spinal cord. These meninges consist of the dura mater, the arachnoid mater, and the pia mater. They protect the CNS, provide structural support, and aid in circulating cerebrospinal fluid (CSF).
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Updated: Jun 3, 2026

Induction of Leptomeningeal Cells Modification Via Intracisternal Injection

Induction of Leptomeningeal Cells Modification Via Intracisternal Injection

Published on: May 7, 2020

[Meningeal irritation].

Rob Dijcks¹, Marloes Derks, Maarten Verwijnen

¹Maastricht Universitair Medisch Centrum, Skillslab, Maastricht, the Netherlands.

Nederlands Tijdschrift Voor Geneeskunde

|April 7, 2011

Summary

This summary is machine-generated.

Diagnosing meningitis relies on comprehensive patient history and physical exams. Specific tests for meningeal irritation, like Kernig

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Area of Science:

Neurology
Infectious Diseases
Clinical Diagnostics

Context:

Meningitis diagnosis relies on a combination of patient history and physical examination findings.
The diagnostic utility of specific physical examination signs for meningeal irritation is under review.

Purpose:

To evaluate the diagnostic value of specific physical examination maneuvers in suspected meningitis cases.

Summary:

In adults with suspected meningitis, tests for meningeal irritation (Kernig's sign, Brudzinski's sign, nuchal rigidity) likely do not significantly alter diagnostic reliability.
These specific signs appear to have minimal to no diagnostic value in diagnosing meningitis in very young children and the elderly.

Impact:

Findings may refine diagnostic protocols for meningitis, emphasizing clinical history and overall examination over isolated physical signs.
This could lead to more efficient and potentially more accurate diagnostic pathways, especially in vulnerable populations.