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Related Concept Videos

Viral Meningitis01:18

Viral Meningitis

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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...
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Arboviral Encephalitis01:25

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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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Encephalitis l: Introduction01:19

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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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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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Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...
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Evolution from viral encephalitis to autoimmune encephalitis to multiple sclerosis: a case report.

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This case study details a patient

Keywords:
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Area of Science:

  • Neuroimmunology and infectious neurology.
  • Central nervous system (CNS) inflammatory disorders.

Background:

  • Established links exist between viral encephalitis, autoimmune encephalitis, and demyelinating CNS diseases.
  • Understanding the progression and overlap of these conditions is crucial for diagnosis and treatment.

Observation:

  • A patient initially presented with varicella zoster virus (VZV) encephalitis.
  • Subsequently, the patient developed limbic autoimmune encephalitis (AIE) with hippocampal involvement.
  • Finally, the patient was diagnosed with multiple sclerosis (MS) exhibiting widespread demyelination.

Findings:

  • The case demonstrates a sequential evolution from VZV encephalitis to AIE, and finally to MS in a single patient.
  • Diagnostic findings included positive VZV PCR, CSF pleocytosis, specific antibodies, and characteristic MRI lesions.
  • Treatment evolved from acyclovir to immunotherapy (steroids, IVIG) and then to rituximab.

Implications:

  • This rare clinical progression highlights the complex interplay between viral infections and autoimmune CNS diseases.
  • Recognizing such rare constellations is vital for guiding appropriate and timely treatment strategies.
  • The case offers insights into the pathophysiology of neuroimmunological disorders, including viral triggers and autoimmune overlap.