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Updated: Feb 22, 2026
High-throughput Detection of Respiratory Pathogens in Animal Specimens by Nanoscale PCR
Published on: November 28, 2016
Development of a multiplex PCR for simultaneous detection of Pasteurella multocida, Mannheimia haemolytica and
Wenlong Zhang1,2,3, Xiaodan Liu1, Mengcheng Liu1
11 Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University , Harbin, Heilongjiang 150030 , P. R. China.
Abstract:
Pasteurella multocida, Mannheimia haemolytica and Trueperella pyogenes are three bacterial pathogens closely associated with the bovine respiratory disease complex (BRDC). In the current study, a multiplex PCR for the simultaneous detection of these three bacteria in cultures was established. After serial optimisation, the detection limit of the method for the genomic DNA of the three bacteria was 40 pg/μl. The method could detect the genomic DNA of these three bacteria but not the genomic DNA of seven other bacterial strains. Together with the bacterial enrichment technology, the multiplex PCR could be used for detecting the three bacteria in animal tissues. This method might be valuable for speeding up laboratory diagnosis and directing the treatment of BRDC to these three bacterial pathogens.
Insights
A new multiplex PCR method accurately detects Pasteurella multocida, Mannheimia haemolytica, and Trueperella pyogenes, key causes of bovine respiratory disease complex (BRDC). This rapid diagnostic tool aids in faster treatment decisions for affected cattle.
Area of Science:
- Veterinary Microbiology
- Molecular Diagnostics
- Bacterial Pathogenesis
Background:
- Bovine Respiratory Disease Complex (BRDC) is a significant economic concern in cattle production.
- Pasteurella multocida, Mannheimia haemolytica, and Trueperella pyogenes are primary bacterial pathogens implicated in BRDC.
- Accurate and rapid identification of these pathogens is crucial for effective treatment and disease management.
Purpose of the Study:
- To develop and validate a multiplex PCR assay for the simultaneous detection of P. multocida, M. haemolytica, and T. pyogenes.
- To establish the sensitivity and specificity of the developed multiplex PCR method.
- To assess the utility of the multiplex PCR in conjunction with bacterial enrichment for detecting these pathogens in animal tissues.
Main Methods:
- Development of a multiplex PCR assay targeting specific genes of P. multocida, M. haemolytica, and T. pyogenes.
- Optimization of PCR conditions to achieve optimal sensitivity and specificity.
- Testing the assay's detection limit using purified genomic DNA.
- Validation of the assay against known bacterial strains and in combination with bacterial enrichment from animal tissues.
Main Results:
- The multiplex PCR assay was successfully established for the simultaneous detection of the three target bacteria.
- The optimized method demonstrated a detection limit of 40 pg/μl for the genomic DNA of the target pathogens.
- The assay exhibited high specificity, accurately detecting the target bacteria while showing no cross-reactivity with seven other tested bacterial strains.
- The multiplex PCR, when combined with bacterial enrichment, proved effective for detecting the pathogens in animal tissues.
Conclusions:
- A novel multiplex PCR assay provides a rapid and accurate method for identifying key bacterial pathogens associated with BRDC.
- This diagnostic tool can significantly expedite laboratory diagnosis, enabling quicker treatment decisions for BRDC.
- The integration of bacterial enrichment enhances the applicability of the multiplex PCR for direct detection in animal tissues, improving BRDC management strategies.
