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Optimized PCR-based Detection of Mycoplasma
Published on: June 20, 2011
Research Note: Real-time fluorescence-based recombinase-aided amplification for rapid detection of Mycoplasma
Wenlong Xia1, Shupei Yu2, Jing Huang1
1Yancheng Engineering Research Center of Animal Biologics, School of Marine and Biological Engineering, Yancheng Teachers University, Yancheng 224007, China.
Abstract:
Mycoplasma synoviae (MS) is an essential pathogenic mycoplasma in poultry worldwide, posing a serious threat to the poultry industry's health. Timely detection is imperative for early diagnosis, prevention, and control of MS infection. Current laboratory methods for MS detection are generally complicated, time-consuming, and require sophisticated equipment. Therefore, a simple and rapid method is urgently needed. This study developed a novel real-time fluorescence-based recombinase-aided amplification (RF-RAA) technique for detecting MS nucleic acids, enabling target gene amplification within 20 min at 39°C. The RF-RAA outcomes are interpretable in 2 modalities: real-time fluorescence monitoring employing a temperature-controlled fluorescence detector or direct visual inspection facilitated by a portable blue light transilluminator. This method exhibits robust specificity, demonstrating no cross-reactivity with various common poultry pathogens, and achieves high sensitivity, detecting as low as 10 copies/μL for the standard plasmid. Seventy-one clinical samples of chicken throat swabs were detected by RF-RAA and real-time fluorescence quantitative polymerase chain reaction (qPCR) methods. The diagnostic coincidence rates of qPCR with RF-RAA (fluorescence monitoring) and RF-RAA (visual observation) were determined to be 100% and 97.2% (69/71), respectively. In conclusion, the RF-RAA method developed in this study provides a rapid and visually observable approach for MS detection, offering a novel technique to diagnosing MS infection, especially in resource-limited settings.
Insights
A new real-time fluorescence-based recombinase-aided amplification (RF-RAA) method rapidly detects Mycoplasma synoviae (MS) nucleic acids in poultry. This technique offers a simple, visual alternative to complex lab tests for early MS infection diagnosis.
Area of Science:
- Veterinary Microbiology
- Molecular Diagnostics
- Poultry Health
Background:
- Mycoplasma synoviae (MS) is a significant poultry pathogen globally.
- Current MS detection methods are complex, time-consuming, and require specialized equipment.
- There is a critical need for rapid and simple diagnostic tools for MS.
Purpose of the Study:
- To develop and validate a novel real-time fluorescence-based recombinase-aided amplification (RF-RAA) technique for MS nucleic acid detection.
- To establish a rapid, sensitive, and specific method for diagnosing MS infection in poultry.
- To provide a visually interpretable diagnostic tool for resource-limited settings.
Main Methods:
- Development of a real-time fluorescence-based recombinase-aided amplification (RF-RAA) assay.
- Amplification of target MS nucleic acids within 20 minutes at 39°C.
- Validation using real-time fluorescence monitoring and portable blue light transillumination for visual inspection.
- Testing on 71 clinical chicken throat swab samples.
Main Results:
- The RF-RAA method achieved target gene amplification in under 20 minutes.
- High specificity was demonstrated, with no cross-reactivity against common poultry pathogens.
- The assay showed high sensitivity, detecting as low as 10 copies/μL of standard plasmid.
- Diagnostic coincidence with real-time quantitative polymerase chain reaction (qPCR) was 100% for fluorescence monitoring and 97.2% for visual observation.
Conclusions:
- The developed RF-RAA method is a rapid and visually observable approach for MS detection.
- This technique offers a novel diagnostic tool for MS infection, particularly beneficial in resource-limited environments.
- RF-RAA provides a valuable alternative to conventional laboratory methods for poultry disease surveillance.
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