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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...
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,...
Endocarditis II: Clinical Features of Infective Endocarditis01:25

Endocarditis II: Clinical Features of Infective Endocarditis

Endocarditis can present various clinical features depending on the causative organism and the patient's underlying health conditions. Initially, the clinical features of infective endocarditis develop gradually, presenting with nonspecific symptoms that can be easily mistaken for other illnesses.General SymptomsEarly symptoms of infective endocarditis are fever, chills, weakness, malaise, fatigue, and weight loss. These symptoms reflect the systemic nature of the infection and the body's...
Encephalitis ll: Pathophysiology01:26

Encephalitis ll: Pathophysiology

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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Related Experiment Video

Updated: May 22, 2026

Inducing Meningococcal Meningitis Serogroup C in Mice via Intracisternal Delivery
10:03

Inducing Meningococcal Meningitis Serogroup C in Mice via Intracisternal Delivery

Published on: November 5, 2019

Meningococcal disease: clinical presentation and sequelae.

David Pace1, Andrew J Pollard

  • 1Department of Paediatrics, Mater Dei Hospital, Tal-Qroqq, Msida, MSD 2090, Malta. dpace@go.net.mt

Vaccine
|May 22, 2012
PubMed
Summary

Invasive meningococcal disease presents diversely, ranging from mild symptoms to fatal sepsis. Vaccination is the only effective strategy to prevent this serious bacterial infection and its complications.

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Induction of Leptomeningeal Cells Modification Via Intracisternal Injection
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Induction of Leptomeningeal Cells Modification Via Intracisternal Injection

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Related Experiment Videos

Last Updated: May 22, 2026

Inducing Meningococcal Meningitis Serogroup C in Mice via Intracisternal Delivery
10:03

Inducing Meningococcal Meningitis Serogroup C in Mice via Intracisternal Delivery

Published on: November 5, 2019

Induction of Leptomeningeal Cells Modification Via Intracisternal Injection
05:55

Induction of Leptomeningeal Cells Modification Via Intracisternal Injection

Published on: May 7, 2020

Area of Science:

  • Infectious Diseases
  • Microbiology
  • Public Health

Background:

  • Invasive meningococcal disease (IMD) encompasses a range of clinical presentations, most commonly meningitis and septicaemia.
  • Disease severity varies significantly, from mild bacteraemia to fulminant sepsis with multiorgan failure, leading to death in 10-15% of cases.
  • While localized infections and chronic forms exist, they can progress to severe disseminated disease.

Purpose of the Study:

  • To summarize the diverse clinical spectrum of invasive meningococcal disease.
  • To highlight the potential for severe outcomes and long-term sequelae in survivors.
  • To emphasize the critical role of vaccination in preventing meningococcal disease.

Main Methods:

  • Literature review of clinical manifestations of invasive meningococcal disease.
  • Analysis of disease severity spectrum, from mild symptoms to fatal outcomes.
  • Assessment of long-term sequelae in survivors and impact on quality of life.

Main Results:

  • Meningitis and septicaemia are the most frequent presentations of invasive meningococcal disease.
  • Fulminant sepsis occurs in 10-15% of cases, often resulting in death.
  • Survivors, particularly children and adolescents, frequently experience disabling long-term sequelae.

Conclusions:

  • Invasive meningococcal disease presents a broad clinical spectrum with potentially severe consequences.
  • Long-term sequelae significantly impact the quality of life for survivors.
  • Vaccination remains the sole rational approach for preventing meningococcal disease and mitigating its impact.