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High-throughput Detection of Respiratory Pathogens in Animal Specimens by Nanoscale PCR
Published on: November 28, 2016
Multiplexed, rapid detection of H5N1 using a PCR-free nanoparticle-based genomic microarray assay
Jiangqin Zhao1, Shixing Tang, James Storhoff
1Lab of Molecular Virology, Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, MD 20892, USA. Jiangqin.Zhao@fda.hhs.gov
BMC Biotechnology
|October 15, 2010
Summary
A new gold nanoparticle (NP)-based genomic microarray assay rapidly identifies avian influenza virus H5N1. This nanotechnology method distinguishes H5N1 from other influenza A strains, aiding diagnostics.
Area of Science:
- Nanotechnology applications in diagnostics
- Genomic microarray assay development
- Avian influenza virus detection
Background:
- Growing interest in nanotechnology and microarrays for diagnostics.
- Need for rapid and specific identification of avian influenza virus H5N1.
- Limitations of current methods for influenza strain differentiation.
Purpose of the Study:
- To develop a rapid, simple gold nanoparticle (NP)-based genomic microarray assay.
- To specifically identify avian influenza virus H5N1.
- To discriminate H5N1 from other major influenza A virus strains (H1N1, H3N2).
Main Methods:
- Oligonucleotide design targeting M, HA, and NA genes of influenza viruses.
- Gold NP-mediated silver staining for viral RNA detection.
- Hybridization assay without RNA fragmentation or amplification.
Main Results:
- Detection of viral RNA within 2.5 hours.
- Lower limit of detection (LOD) < 100 fM for PCR fragments and 10³ TCID50 for H5N1 RNA.
- Successful identification and discrimination of H5N1 from H1N1 and H3N2.
Conclusions:
- The NP-based microarray assay effectively detects and distinguishes H5N1.
- This method shows potential for simultaneous detection and subtyping of influenza A viruses.
- Advancement in rapid diagnostic tools for influenza surveillance.
