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Related Concept Videos

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...
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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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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...
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...
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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,...
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Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...

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Mammalian cell transcriptome in response to meningitis-causing pathogens.

Alexandra Schubert-Unkmeir1, Heiko Slanina, Matthias Frosch

  • 1Institute of Hygiene and Microbiology, University of Wuerzburg, Josef-Schneider-Str.2, 97080 Wuerzburg, Germany. aunkmeir@hygiene.uni-wuerzburg.de

Expert Review of Molecular Diagnostics
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PubMed
Summary
This summary is machine-generated.

This review summarizes recent gene expression analyses in bacterial meningitis research. High-throughput methods reveal host responses to Neisseria meningitidis and Streptococcus pneumoniae, improving understanding of disease pathogenesis.

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Area of Science:

  • Microbiology
  • Immunology
  • Genomics

Background:

  • Bacterial meningitis remains a significant cause of death and disability despite advances in antimicrobial treatments.
  • Understanding the pathogenesis of bacterial meningitis is crucial for developing effective therapies.
  • High-throughput methods, such as DNA microarrays, offer a comprehensive view of host transcriptional responses during bacterial infections.

Purpose of the Study:

  • To review recent findings from gene expression analyses in bacterial meningitis.
  • To discuss studies investigating host responses to Neisseria meningitidis and Streptococcus pneumoniae using DNA microarrays.
  • To highlight the contribution of global gene expression analyses to understanding bacterial meningitis pathophysiology.

Main Methods:

  • DNA microarray technology was employed to analyze host cellular responses.
  • Studies focused on infections caused by Neisseria meningitidis and Streptococcus pneumoniae.
  • Gene expression data were analyzed to identify differentially expressed genes.

Main Results:

  • Numerous differentially expressed genes were identified in response to Neisseria meningitidis and Streptococcus pneumoniae infections.
  • Studies have elucidated both common and pathogen-specific host responses during bacterial meningitis.
  • Gene expression profiling has provided insights into the complex host-pathogen interactions.

Conclusions:

  • Gene expression analyses are vital for understanding the pathogenesis of bacterial meningitis.
  • Identifying specific host responses can guide the development of targeted therapeutic strategies.
  • Continued research using high-throughput methods will further unravel the complexities of bacterial meningitis.