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Laboratory diagnosis of amebiasis
1Division of Medical Microbiology, University of British Columbia.
Clinics in Laboratory Medicine
|December 1, 1991
Summary
Accurate diagnosis of amebiasis, particularly Entamoeba histolytica, relies on immediate specimen preservation and examination of stained smears. Serology aids in diagnosing extraintestinal amebiasis, with future diagnostics focusing on cost-effectiveness.
Area of Science:
- Medical Parasitology
- Clinical Diagnostics
- Infectious Diseases
Background:
- Amebiasis diagnosis procedures vary geographically.
- Microscopic examination of preserved specimens is key for differentiating Entamoeba histolytica.
Purpose of the Study:
- To evaluate current diagnostic procedures for amebiasis.
- To identify optimal methods for differentiating E. histolytica from other intestinal amebae.
- To assess the utility of serology and emerging diagnostic technologies.
Main Methods:
- Microscopic examination of concentrated and stained fecal smears.
- Evaluation of fecal material cultivation.
- Assessment of serological diagnostic methods.
- Consideration of antigen detection kits and DNA probes.
Main Results:
- Immediate specimen preservation and examination of stained smears yield satisfactory results for E. histolytica differentiation.
- Fecal cultivation offers limited additional diagnostic yield relative to its cost and time.
- Serology is valuable for diagnosing extraintestinal amebiasis.
Conclusions:
- Microscopy with immediate preservation is the preferred method for intestinal amebiasis diagnosis.
- Serology is a useful adjunct for extraintestinal cases.
- Future diagnostics like antigen detection and DNA probes show promise for improved accuracy and cost-effectiveness.
- Further research is needed on specimen submission guidelines and cost-effectiveness analysis.