A DNA microarray-based assay to detect dual infection with two dengue virus serotypes

Area of Science:

• Molecular Virology
• Diagnostic Technologies
• Infectious Diseases

Background:

• Dengue virus (DENV) poses a significant global health threat, with four distinct serotypes.
• Accurate serotype identification is crucial for disease management and epidemiological surveillance.
• Existing diagnostic methods may struggle to detect multiple DENV serotypes in a single sample.

Purpose of the Study:

• To describe and evaluate a novel microarray-based method for DENV serotype screening.
• To assess the specificity and sensitivity of the DNA microarray assay for detecting single and dual DENV infections.
• To provide a reliable tool for discriminating between the four DENV serotypes.

Main Methods:

• Development of a DNA microarray assay with single-stranded DNA targets covalently attached to glass slides.
• Hybridization of specific, labeled probes to detect DENV serotypes.
• Validation of the microarray assay using DENV isolates and clinical dengue samples.

Main Results:

• The DNA microarray assay demonstrated high specificity and sensitivity in detecting DENV serotypes.
• The method successfully identified both single-serotype and dual-serotype DENV infections.
• No non-specific signals were detected, confirming the accuracy of probe hybridization.

Conclusions:

• The developed microarray-based method is a robust tool for accurate DENV serotype identification.
• This technology effectively distinguishes between the four DENV serotypes and can detect mixed infections.
• The assay offers an improvement over existing methods that may underestimate multiple serotype infections.