Chronic meningitis: still a diagnostic challenge

J Hildebrand1, M Aoun

  • 1Institut Jules Bordet, rue Héger-Bordet 1, 1000 Bruxelles, Belgium.

Journal of Neurology
|June 11, 2003
PubMed

Insights

Chronic meningitis presents with persistent cerebrospinal fluid (CSF) changes and diverse causes. Diagnostic algorithms aid in differentiating between infectious and non-infectious etiologies in various patient groups.

Area of Science:

  • Neurology
  • Infectious Diseases
  • Clinical Medicine

Background:

  • Chronic meningitis involves progressive lepomeningeal disease and persistent cerebrospinal fluid (CSF) abnormalities for over a month.
  • Causes are diverse, including non-infectious (carcinomatous, systemic, toxic) and infectious (classic, opportunistic) pathogens.
  • Diagnosis can be challenging, requiring thorough evaluation.

Purpose of the Study:

  • To outline the diagnostic approach for chronic meningitis.
  • To provide differential diagnosis algorithms for immunocompetent and immunocompromised patients.
  • To address the wide array of potential etiologies.

Main Methods:

  • Comprehensive patient history and physical examination.
  • Laboratory tests including cerebrospinal fluid (CSF) analysis.
  • Development of diagnostic algorithms based on patient immune status.

Main Results:

  • Chronic meningitis is defined by specific clinical and CSF criteria.
  • A broad spectrum of infectious and non-infectious causes exists.
  • Diagnostic algorithms facilitate the differentiation of potential causes.

Conclusions:

  • Effective diagnosis of chronic meningitis relies on systematic evaluation.
  • Differential diagnosis algorithms are crucial for guiding management in both immunocompetent and immunocompromised individuals.
  • Understanding the diverse etiologies is key to successful patient outcomes.

Related Concept Videos

Bacterial Meningitis01:24

Bacterial Meningitis

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...
Viral Meningitis01:18

Viral Meningitis

Viral meningitis is the most common form of meningitis and is often referred to as aseptic meningitis to indicate the absence of bacterial involvement. It is generally milder than bacterial meningitis, with symptoms including fever, headache, stiff neck, drowsiness, nausea, photophobia, and vomiting. Rarely, more severe manifestations or death may occur. Common causative agents include enteroviruses, particularly coxsackie A and B viruses and echoviruses, all members of the Enterovirus genus...
Cryptococcal Meningitis01:27

Cryptococcal Meningitis

Cryptococcal meningitis is a life-threatening opportunistic infection predominantly associated with HIV/AIDS, accounting for over 100,000 deaths annually worldwide. However, it also affects individuals with other forms of immunosuppression, including those undergoing immunosuppressive therapy, organ transplant recipients, patients with innate immunodeficiencies, and individuals with hematological disorders. The infection is caused mainly by Cryptococcus neoformans and Cryptococcus gattii,...
Bacterial Meningitis I: Introduction01:22

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 II: Pathophysiology01:26

Bacterial Meningitis II: Pathophysiology

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...
Brain Abscess l: Introduction01:26

Brain Abscess l: Introduction

A brain abscess is a focal, intracerebral infection characterized by a localized collection of pus within the brain parenchyma, resulting from microbial invasion and the body’s inflammatory response. It progresses through stages: early and late cerebritis, followed by early and late capsule formation, reflecting tissue destruction, immune response, and eventual encapsulation.Etiology and PathogenesisCausative organisms vary with source and host factors, often involving polymicrobial infections,...