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Related Experiment Video

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High-Throughput Multiparallel Enteropathogen Detection via Nano-Liter qPCR.

Jessica A Grembi1, Koshlan Mayer-Blackwell1, Stephen P Luby2

  • 1Department of Civil and Environmental Engineering, Stanford University, Stanford, CA, United States.

Frontiers in Cellular and Infection Microbiology
|August 9, 2020
PubMed
Summary
This summary is machine-generated.

Nano-liter qPCR (nL-qPCR) offers a cost-effective method for quantifying multiple enteric pathogens in large sample sets. This miniaturized qPCR technology provides high throughput and reduced costs, making it a viable alternative for research applications.

Keywords:
enteric infectionenteropathogenhigh-throughputmolecular detectionqPCRquantification

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Area of Science:

  • Molecular Diagnostics
  • Microbiology
  • Bioengineering

Background:

  • Quantitative molecular diagnostics are crucial for pathogen detection but often limited by high costs for multi-pathogen panels in research.
  • Miniaturized quantitative, real-time PCR (nL-qPCR) offers potential cost savings through parallelization, high throughput, and reduced reagent use.

Purpose of the Study:

  • To evaluate the performance of novel and published assays for detecting 17 enteric pathogens using a commercial nL-qPCR platform.
  • To compare the nL-qPCR technology with a TaqMan Array Card (TAC) for enteropathogen quantification in fecal samples.

Main Methods:

  • A commercially available nL-qPCR system was utilized to test assays for 17 enteric pathogens.
  • Assay performance metrics including amplification efficiency, sensitivity, specificity, and reproducibility were assessed.
  • nL-qPCR results were compared against a standard enteric TaqMan Array Card (TAC) using fecal samples.

Main Results:

  • Amplification efficiencies ranged from 88-98% (mean 91%) and were reproducible across operators and facilities.
  • nL-qPCR assays demonstrated high specificity (99.8%) but had lower detection limits (1-2 orders of magnitude less sensitive) than TAC due to nanofluidic volumes.
  • Overall positive percent agreement with TAC was 62%, increasing to 89% for samples above nL-qPCR detection limits, with a slight underestimation bias compared to TAC.

Conclusions:

  • Despite lower detection limits, nL-qPCR is a sensitive and selective tool for enteropathogen quantification in fecal samples.
  • The nL-qPCR platform offers significantly higher throughput (12x) and lower per-sample cost (1/6th) compared to TAC.
  • nL-qPCR presents a viable, cost-effective alternative for enteropathogen detection in research studies where traditional methods are cost-prohibitive.