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Related Experiment Video

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Development of Multiplex Real-Time RT-qPCR Assays for the Detection of SARS-CoV-2, Influenza A/B, and MERS-CoV
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MultiCode-PLx system for multiplexed detection of seventeen respiratory viruses.

Frederick S Nolte1, David J Marshall, Christopher Rasberry

  • 1Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia, USA. nolte@musc.edu

Journal of Clinical Microbiology
|June 29, 2007
PubMed
Summary

The MultiCode-PLx system offers rapid, sensitive detection of 17 respiratory viruses. This molecular test showed higher yields than traditional methods, improving diagnosis for common respiratory infections.

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Area of Science:

  • Clinical Virology
  • Molecular Diagnostics
  • Infectious Diseases

Background:

  • Respiratory viral infections pose a significant public health burden.
  • Accurate and rapid diagnosis is crucial for patient management and infection control.
  • Existing diagnostic methods like direct fluorescent-antibody (DFA) staining and shell vial culture have limitations in sensitivity and scope.

Purpose of the Study:

  • To evaluate the performance of the MultiCode-PLx system for the detection of respiratory viruses.
  • To compare the diagnostic yield of MultiCode-PLx with DFA staining and R-mix culture.
  • To assess the system's ability to detect a broad range of respiratory viruses, including those not covered by conventional methods.

Main Methods:

  • The MultiCode-PLx system, utilizing multiplex PCR and microsphere flow cytometry, was tested on 354 clinical respiratory specimens.
  • Results were compared against parallel testing with DFA staining and R-mix culture.
  • Single-target PCR was used for confirmation of discordant or novel results.

Main Results:

  • The MultiCode-PLx system detected respiratory viruses in 32.7% of specimens, compared to 21.8% with DFA and R-mix culture.
  • It demonstrated significantly higher detection rates for Influenza A viruses.
  • The system identified human metapneumovirus, coronaviruses, and rhinoviruses, and detected mixed viral infections, which were missed by conventional methods.

Conclusions:

  • The MultiCode-PLx system is a practical, rapid, and sensitive molecular assay for the simultaneous detection of multiple common respiratory viruses.
  • It offers an increased diagnostic yield compared to traditional methods.
  • This technology can significantly enhance the molecular detection capabilities of clinical virology laboratories.