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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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Development of Multiplex Real-Time RT-qPCR Assays for the Detection of SARS-CoV-2, Influenza A/B, and MERS-CoV

Published on: November 10, 2023

Clinical validation of multiplex real-time PCR assays for detection of bacterial meningitis pathogens

Xin Wang1, M Jordan Theodore, Raydel Mair

  • 1Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA. xwang2@cdc.gov

Journal of Clinical Microbiology
|December 16, 2011
PubMed

Insights

New multiplex real-time PCR assays improve detection of meningitis pathogens Neisseria meningitidis, Haemophilus influenzae, and Streptococcus pneumoniae. These enhanced assays offer high sensitivity and specificity for improved public health surveillance.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Public Health

Background:

  • Neisseria meningitidis, Haemophilus influenzae, and Streptococcus pneumoniae are leading causes of meningitis.
  • Accurate and rapid laboratory diagnostics are crucial for controlling infectious disease outbreaks.
  • Existing singleplex real-time PCR assays for N. meningitidis serogroups B, W135, and Y exhibit low sensitivity.

Purpose of the Study:

  • To enhance the sensitivity of real-time PCR assays for specific N. meningitidis serogroups.
  • To develop multiplex real-time PCR assays for simultaneous detection of key meningitis pathogens.
  • To reduce diagnostic time and costs for improved public health interventions.

Main Methods:

  • Development of new singleplex real-time PCR assays targeting N. meningitidis serogroups B (synD), W135 (synG), and Y (synF).
  • Creation of three distinct multiplex real-time PCR assays: NHS (N. meningitidis, H. influenzae, S. pneumoniae), AWX (N. meningitidis serogroups A, W135, X), and BCY (N. meningitidis serogroups B, C, Y).
  • Evaluation of specificity, sensitivity, and lower limits of detection (LLD) for both singleplex and multiplex assays.

Main Results:

  • New singleplex assays demonstrated high sensitivity (99% for B, 97% for W135, 100% for Y) and specificity for N. meningitidis.
  • Improved LLDs were achieved: 9 copies/reaction for B synD, 43 for W135 synG, and 10 for Y synF.
  • Multiplex assays (NHS, AWX, BCY) exhibited 100% specificity, with LLDs comparable to singleplex assays and no significant differences in sensitivity or cycle threshold values.

Conclusions:

  • The developed singleplex and multiplex real-time PCR assays significantly improve the detection of N. meningitidis serogroups and common meningitis pathogens.
  • These assays provide a sensitive, specific, and efficient tool for laboratory diagnosis and public health surveillance.
  • Multiplexing reduces assay time and cost without compromising diagnostic performance.

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