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Dementia associated with infectious diseases.

Osvaldo P Almeida1, Nicola T Lautenschlager

  • 1University of Western Australia, School of Psychiatry and Clinical Neurosciences, Mail Delivery Point M573, 35 Stirling Highway, Crawley, Perth, WA 6009, Australia. osvalm@cyllene.uwa.edu.au

International Psychogeriatrics
|October 22, 2005
PubMed
Summary

Infectious diseases, like syphilis and HIV, can cause dementia. While antibiotics reduced this risk, new infections like AIDS and vCJD have renewed focus on infectious causes of cognitive impairment.

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Public Health.

Alzheimer's & dementia : the journal of the Alzheimer's Association·2025

Area of Science:

  • Neurology
  • Infectious Diseases
  • Public Health

Background:

  • Infectious diseases were a major cause of dementia and cognitive impairment historically.
  • Antibiotic advancements decreased the frequency of infectious dementia.
  • Recent emergence of AIDS and vCJD has reignited interest in this area.

Purpose of the Study:

  • To review the most frequent infectious causes of dementia.
  • To highlight the link between specific pathogens and cognitive decline.

Main Methods:

  • Literature review of infectious agents associated with dementia.
  • Analysis of historical and recent data on infectious dementia.

Main Results:

  • Identified prion diseases, HIV, syphilis, and others as key infectious causes.

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  • Detailed the mechanisms of cognitive impairment for each pathogen.

    • Conclusions:

    • Infectious agents remain a significant, though often overlooked, cause of dementia.
    • Understanding these links is crucial for diagnosis and treatment.
    • Further research is needed to address emerging infectious dementia threats.