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Updated: May 8, 2026

Multiplex Detection of Bacteria in Complex Clinical and Environmental Samples using Oligonucleotide-coupled Fluorescent Microspheres

Multiplex Detection of Bacteria in Complex Clinical and Environmental Samples using Oligonucleotide-coupled Fluorescent Microspheres

Published on: October 23, 2011

Rapid oligonucleotide suspension array-based multiplex detection of bacterial pathogens.

Jinyin Zhao¹, Lin Kang, Rui Hu

¹1 State Key Laboratory of Pathogen and Biosecurity, Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences , Beijing, China .

Foodborne Pathogens and Disease

|August 17, 2013

Summary

This summary is machine-generated.

This study developed a multiplex polymerase chain reaction (PCR) assay for rapid bacterial screening. The novel method efficiently detects 10 common bacterial strains, including Shigella and Staphylococcus aureus, in various sample types.

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Area of Science:

Molecular Biology
Microbiology
Biotechnology

Background:

Rapid and accurate detection of bacterial pathogens is crucial for public health and environmental safety.
Existing methods for bacterial identification can be time-consuming and may lack multiplexing capabilities.
A need exists for a sensitive and specific assay to screen for multiple bacterial strains simultaneously.

Purpose of the Study:

To develop and validate a gene-specific microsphere suspension array coupled with multiplex polymerase chain reaction (PCR) for the rapid detection of 10 bacterial strains.
To assess the sensitivity and specificity of the developed assay for identifying key bacterial pathogens.

Main Methods:

A 15-plex PCR assay was designed using 15 validated primer sets to amplify target genes from 10 bacterial strains.
Gene-specific oligonucleotide probes conjugated with microsphere sets were employed for the specific identification of PCR amplicons.
The assay was tested using purified genomic DNA and validated with artificially spiked water samples and environmental water specimens.

Main Results:

The assay demonstrated high sensitivity, detecting purified genomic DNA at concentrations as low as 10 copies/μL in single PCR.
The multiplex detection limit ranged from 10 to 10⁴ copies/μL for the targeted bacterial strains.
Successful validation was achieved using spiked water samples and environmental water from swimming pools containing Staphylococcus aureus.

Conclusions:

The developed gene-specific microsphere suspension array coupled with multiplex PCR offers a rapid and sensitive method for screening bacterial pathogens.
This assay has the potential for broad application in clinical diagnostics, food safety, and environmental monitoring.
The technology enables simultaneous detection of multiple bacterial strains, improving efficiency in pathogen screening.