Chronic meningitis

Tina Q Tan1

  • 1Feinberg School of Medicine, Northwestern University, Division of Infectious Diseases, Children's Memocrial Hospital, Chicago, IL 60614, USA. ttan@northwestern.edu

Insights

Chronic meningitis, a condition lasting over four weeks, presents with persistent symptoms and cerebrospinal fluid abnormalities. Identifying the cause requires detailed patient history, physical exams, and specific laboratory tests for accurate diagnosis.

Area of Science:

  • Neurology
  • Infectious Diseases
  • Clinical Medicine

Background:

  • Chronic meningitis is defined by persistent symptoms and cerebrospinal fluid (CSF) changes for at least four weeks.
  • Numerous infectious and noninfectious etiologies can lead to chronic meningitis, often posing diagnostic challenges.

Purpose of the Study:

  • To outline the diagnostic approach for chronic meningitis.
  • To emphasize the importance of a comprehensive evaluation in identifying the causative agent.

Main Methods:

  • Review of clinical presentation and diagnostic criteria for chronic meningitis.
  • Analysis of the role of patient history, physical examination, and CSF analysis.
  • Highlighting the necessity of specific laboratory investigations.

Main Results:

  • Chronic meningitis presents with specific clinical and CSF findings (pleocytosis, elevated protein).
  • A wide range of diseases can cause this condition, complicating diagnosis.
  • Systematic evaluation is crucial for etiological identification.

Conclusions:

  • Accurate diagnosis of chronic meningitis relies on integrating clinical data with laboratory findings.
  • Thorough investigation, including exposure history and CSF analysis, is essential for effective management.

Related Concept Videos

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...
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 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...
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...
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...
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,...