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Related Concept Videos

Viral Meningitis01:18

Viral Meningitis

199
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...
199
Arboviral Encephalitis01:25

Arboviral Encephalitis

59
Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...
59
Bacterial Meningitis I: Introduction01:22

Bacterial Meningitis I: Introduction

15
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...
15
Bacterial Meningitis II: Pathophysiology01:26

Bacterial Meningitis II: Pathophysiology

24
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...
24
Encephalitis l: Introduction01:19

Encephalitis l: Introduction

15
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...
15
Encephalitis ll: Pathophysiology01:26

Encephalitis ll: Pathophysiology

22
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...
22

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Related Experiment Video

Updated: May 5, 2026

In Vivo Imaging Systems IVIS Detection of a Neuro-Invasive Encephalitic Virus
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Viral meningoencephalitis: a focus on diagnostics.

Néstor López1, Genoveva Cuesta2, Pedro Puerta-Alcalde3,4,5

  • 1Infectious Disease Department, Hospital Clinic of Barcelona, Barcelona, Spain.

Current Opinion in Infectious Diseases
|September 24, 2025
PubMed
Summary

Next-generation sequencing (NGS) shows promise for diagnosing viral meningoencephalitis, offering improved yield over traditional PCR methods, especially for complex cases. Further research is needed to optimize its routine clinical use.

Keywords:
PCRcerebrospinal fluiddiagnostic yielddiagnosticsmeningoencephalitismetagenomic next-generation sequencingmultiplex assaysviral encephalitis

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Area of Science:

  • Neurology
  • Infectious Diseases
  • Molecular Diagnostics

Background:

  • Viral meningoencephalitis diagnosis is challenging due to nonspecific symptoms.
  • Current molecular techniques like PCR have limitations in sensitivity and pathogen suspicion.

Purpose of the Study:

  • To review current and emerging diagnostic strategies for viral meningoencephalitis.
  • To highlight the role of molecular techniques, including next-generation sequencing (NGS).

Main Methods:

  • Review of diagnostic strategies for viral meningoencephalitis.
  • Focus on polymerase chain reaction (PCR) and multiplex RT-PCR.
  • Evaluation of next-generation sequencing (NGS) technologies.

Main Results:

  • PCR and multiplex RT-PCR assays are widely used but have limitations.
  • NGS offers a hypothesis-free approach with higher diagnostic yield, particularly in immunocompromised or atypical cases.
  • Practical challenges like cost and turnaround time limit routine NGS implementation.

Conclusions:

  • Integrating NGS into diagnostics could improve viral meningoencephalitis detection rates.
  • Further studies are required to refine NGS clinical application, cost-effectiveness, and establish usage guidelines.