Analytical evaluation of the microarray-based FluChip-8G Influenza A+B Assay

Area of Science:

• Virology
• Molecular Diagnostics
• Public Health

Background:

• Influenza poses a significant annual disease burden.
• Accurate influenza virus characterization is crucial for clinical and public health.
• Current diagnostic methods like immunoassays and RT-PCR have limitations in speed, sensitivity, or susceptibility to mutations.

Purpose of the Study:

• To evaluate the analytical performance of the FluChip-8G Influenza A+B Assay.
• Assess the assay's capability for influenza A and B virus identification, including non-seasonal strains.

Main Methods:

• Analytical sensitivity (limit of detection)
• Cross-reactivity testing with 34 other organisms
• Multi-site reproducibility assessment

Main Results:

• The limit of detection ranged from 5.8 × 10² to 1.5 × 10⁵ genome copies/mL.
• The assay correctly identified 52 additional influenza strains near the limit of detection.
• High reproducibility (97.0%) was observed across different operators, sites, and reagent lots.

Conclusions:

• The FluChip-8G Influenza A+B Assay demonstrates effective detection and identification of diverse influenza viruses.
• The assay exhibits good sensitivity, robust reactivity, and high reproducibility, making it a viable alternative to RT-PCR and sequencing.
• Further clinical validation is warranted to confirm its utility in real-world settings.