Diagnostic Techniques for Soil-Transmitted Helminths - Recent Advances.

Area of Science:

• Medical Parasitology
• Infectious Diseases
• Diagnostic Technologies

Background:

• Soil-transmitted helminth (STH) infections cause significant global morbidity.
• Accurate diagnostics are essential for STH control program monitoring and burden assessment.
• Existing diagnostic methods, primarily microscopy, have limitations in sensitivity and applicability.

Purpose of the Study:

• To review and discuss current and emerging diagnostic methods for STH infections.
• To highlight the importance of sensitive and specific diagnostics for STH control.
• To consider factors influencing the choice of diagnostic assays in various settings.

Main Methods:

• Review of conventional microscopy-based diagnostic techniques (e.g., Kato-Katz).
• Evaluation of advancements in digital microscopy and smartphone adaptation.
• Assessment of antibody and coproantigen detection methods.
• Exploration of sensitive molecular diagnostics like PCR, qPCR, and LAMP assays.
• Consideration of environmental sample analysis for STH eggs.

Main Results:

• Conventional microscopy remains a mainstay but has limitations.
• Digital formats and image analysis offer improved sensitivity and field applicability.
• Molecular diagnostics show high potential for sensitive detection, especially in low endemicity settings.
• Sample preservation and DNA extraction are critical for molecular test efficiency.

Conclusions:

• No single diagnostic test is fully adequate for all STH detection scenarios.
• Molecular techniques offer significant advantages for precise STH burden assessment and emerging species detection.
• The choice of diagnostic method should balance performance, cost, ease of use, and field applicability.