A Modified Sample Preparation Protocol for High-Efficiency Lab-on-a-Disk-Based Separation and Single-Image...

Area of Science:

• Parasitology
• Medical Diagnostics
• Biotechnology

Background:

• Soil-transmitted helminths (STHs) are a major global health concern, especially in tropical/subtropical areas.
• Current microscopic stool examination lacks sensitivity for low-intensity infections.
• Lab-on-a-disk (LoD) technologies offer potential for improved STH diagnostics.

Purpose of the Study:

• To enhance the SIMPAQ (single-image parasite quantification) LoD device's diagnostic efficiency for STHs.
• To address limitations including sample preparation, egg capture, and debris obstruction.
• To develop a more reliable method for detecting low-intensity STH infections.

Main Methods:

• Laboratory experiments using polystyrene particles and purified STH eggs.
• Evaluation of the complete SIMPAQ procedure from sample preparation to image analysis.
• Comparison of standard protocol with modified, more efficient procedures.

Main Results:

• The modified protocol significantly reduced particle and egg loss during sample preparation and processing.
• Reduced debris within the LoD disk improved egg trapping and imaging clarity.
• Enhanced efficiency in egg capture within the Field of View (FOV).

Conclusions:

• The optimized sample preparation protocol substantially improves the reliability of STH diagnosis using the SIMPAQ LoD device.
• The enhanced method increases diagnostic accuracy, particularly for low-intensity infections.
• This advancement contributes to more effective control of soil-transmitted helminthiasis.