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Amebiasis.

D A Bruckner1

  • 1Department of Pathology and Laboratory Medicine, UCLA Medical Center 90024-1713.

Clinical Microbiology Reviews
|October 1, 1992
PubMed
Summary

Entamoeba histolytica causes amebiasis, but only some strains are pathogenic. New diagnostic tools like DNA probes may improve detection and treatment of this widespread parasitic infection.

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Area of Science:

  • Medical Parasitology
  • Molecular Biology
  • Infectious Diseases

Background:

  • Entamoeba histolytica, identified in 1875, is the cause of amebiasis.
  • While many are infected, only a fraction develop severe symptoms, with varying morbidity and mortality.
  • Pathogenic and nonpathogenic strains are suggested, differing in isoenzyme patterns, monoclonal antibody reactivity, and DNA sequences.

Purpose of the Study:

  • To explore the differentiation of pathogenic and nonpathogenic Entamoeba histolytica strains.
  • To investigate the factors influencing pathogenicity, including genetic and environmental influences.
  • To highlight the potential of advanced diagnostic and therapeutic strategies.

Main Methods:

  • Isoenzyme (zymodeme) analysis to differentiate strains.
  • Monoclonal antibodies for strain-specific identification.
  • DNA probes for molecular characterization of Entamoeba histolytica.

Main Results:

  • Evidence suggests distinct pathogenic and nonpathogenic strains of Entamoeba histolytica.
  • Genetic exchange can alter zymodeme patterns, complicating strain classification.
  • Current detection relies on ova and parasite exams and serologic tests.

Conclusions:

  • Monoclonal antibodies and DNA probes offer promise for improved clinical diagnostics.
  • Understanding molecular pathogenicity mechanisms is key for developing vaccines and targeted therapies.
  • Further research is needed to resolve the nature of pathogenicity and its environmental influences.

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