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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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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...
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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...
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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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Tick-borne encephalitis: pathogenesis and clinical implications.

Daniel Růžek1, Gerhard Dobler, Oliver Donoso Mantke

  • 1Institute of Parasitology, Biology Centre of the Academy of Sciences of the Czech Republic, Branišovská 31, CZ-37005 České Budějovice, Czech Republic. ruzekd@paru.cas.cz

Travel Medicine and Infectious Disease
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Summary
This summary is machine-generated.

Tick-borne encephalitis (TBE) causes severe neurological illness in Europe and Asia. This review explores TBE

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Area of Science:

  • Neuroscience
  • Infectious Diseases
  • Virology

Background:

  • Tick-borne encephalitis (TBE) is a significant neurological disease prevalent across Europe and northern Asia.
  • While most infections are asymptomatic, symptomatic cases can lead to severe encephalitis, chronic conditions, or fatality.

Purpose of the Study:

  • To review and synthesize current knowledge on the clinical presentation, pathogenesis, and pathology of TBE in humans.
  • To examine experimental TBE models in animals to elucidate the mechanisms behind its clinical severity.

Main Methods:

  • Comprehensive literature review of clinical TBE cases in humans.
  • Analysis of data from experimental TBE studies in various animal models.

Main Results:

  • Symptomatic TBE presents with fever and severe encephalitis, with potential for long-term neurological sequelae.
  • Pathological findings in humans and animal models reveal significant neuroinflammation and neuronal damage.

Conclusions:

  • Understanding the pathogenesis and pathology of TBE is crucial for explaining its clinical severity.
  • Further research into TBE mechanisms may inform strategies for prevention and treatment of this debilitating disease.