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Updated: Sep 16, 2025
Multiplex Detection of Bacteria in Complex Clinical and Environmental Samples using Oligonucleotide-coupled Fluorescent Microspheres
Published on: October 23, 2011
A quadruplex real-time fluorescent quantitative PCR detection method for identification and serotyping of Pasteurella
Mengfei Zhao1, Wenqing Wu1, Wenbo Song1
1National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China; Hubei Hongshan Laboratory, Wuhan, 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, China.
A new quadruplex quantitative PCR (qPCR) method rapidly identifies and serotypes Pasteurella multocida, specifically targeting capsular serogroups A, D, and F. This advancement aids in controlling zoonotic infections from pets and other animals.
Area of Science:
- Veterinary Microbiology
- Molecular Diagnostics
- Zoonotic Disease Research
Background:
- Pasteurella multocida is a zoonotic bacterium causing diverse infections in humans and animals.
- Accurate identification and serotyping are crucial for controlling P. multocida outbreaks.
- Existing methods can be time-consuming and lack comprehensive serogroup differentiation.
Purpose of the Study:
- To develop a rapid, accurate quadruplex quantitative PCR (qPCR) assay for P. multocida identification.
- To differentiate key capsular serogroups A, D, and F of P. multocida.
- To provide a high-throughput tool for epidemiological surveillance and control.
Main Methods:
- Designed species-specific and serogroup-specific primers and probes for P. multocida.
- Targeted kmt1 gene for species identification, and hyaD-hyaC, dcbF, fcbD for serogroups A, D, and F.
- Validated the qPCR assay using reference strains and clinical samples (respiratory swabs).
Main Results:
- The qPCR assay achieved high sensitivity with low detection limits for P. multocida and serogroups A, D, F.
- Excellent reproducibility and specificity were confirmed, with no cross-reactivity.
- Applied to 121 feline respiratory swabs, identifying 96 positive for P. multocida, with serogroup distribution: 66 (A), 1 (D), 24 (F).
Conclusions:
- The developed quadruplex qPCR is a reliable and efficient method for P. multocida identification and serotyping (A, D, F).
- This assay facilitates rapid diagnosis and epidemiological studies of P. multocida infections.
- It supports enhanced public health strategies and research into P. multocida pathogenesis.
