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Related Concept Videos

Viral Meningitis01:18

Viral Meningitis

217
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...
217
Bacterial Meningitis I: Introduction01:22

Bacterial Meningitis I: Introduction

31
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...
31
Bacterial Meningitis II: Pathophysiology01:26

Bacterial Meningitis II: Pathophysiology

45
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...
45
Encephalitis l: Introduction01:19

Encephalitis l: Introduction

27
Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...
27
Encephalitis ll: Pathophysiology01:26

Encephalitis ll: Pathophysiology

30
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...
30
Brain Abscess l: Introduction01:26

Brain Abscess l: Introduction

47
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...
47

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Related Experiment Video

Updated: May 6, 2026

Non-Invasive Model of Neuropathogenic Escherichia coli Infection in the Neonatal Rat
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Aseptic meningitis: a foundation review.

Hazim Allos1, Rodrigo Hasbun

  • 1Department of Medicine, Section of Infectious Disease, McGovern Medical School, UT Health Science Center, Houston, Texas, USA.

Current Opinion in Infectious Diseases
|March 28, 2025
PubMed
Summary
This summary is machine-generated.

Advanced molecular diagnostics are improving the identification of pathogens causing aseptic meningitis (inflammation of the membranes surrounding the brain and spinal cord). This leads to better patient outcomes and reduced healthcare costs by enabling earlier, targeted treatments.

Keywords:
advanced molecular diagnosticsaseptic meningitiscerebrospinal fluid analysisinfectious and noninfectious etiologiesviral and bacterial differentiation

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Area of Science:

  • Neurology
  • Infectious Diseases
  • Molecular Diagnostics

Background:

  • Aseptic meningitis presents with diverse infectious and non-infectious causes.
  • Over 50% of aseptic meningitis cases lack an identified etiology.
  • Distinguishing bacterial from non-bacterial meningitis is a clinical challenge.

Purpose of the Study:

  • To review diagnostic and management strategies for aseptic meningitis.
  • To explore the impact of advanced molecular diagnostics on clinical practice.
  • To highlight the importance of identifying causative agents for improved patient care.

Main Methods:

  • Comprehensive literature review of aseptic meningitis.
  • Analysis of advanced molecular diagnostic techniques (e.g., multiplex PCR, metagenomic sequencing).
  • Evaluation of emerging diagnostic algorithms and clinical models.

Main Results:

  • Advanced molecular diagnostics significantly improve pathogen identification in aseptic meningitis.
  • Enteroviruses are the most common cause, but other pathogens (Herpesviridae, arboviruses, fungi, spirochetes) are also implicated.
  • New diagnostic tools aid in differentiating bacterial from viral meningitis, reducing unnecessary antibiotic use.

Conclusions:

  • Advancements in diagnostic technology enable earlier pathogen detection, enhancing patient outcomes and reducing costs.
  • Timely and accurate diagnostics are crucial for effective aseptic meningitis management.
  • Increased awareness of non-infectious etiologies is vital for comprehensive patient care.