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Bead-based suspension array for simultaneous differential detection of five major swine viruses
Ru Chen1, Xiao-Lu Yu, Xiao-Bo Gao
1Animal Inspection and Quarantine Laboratory, Technical Center, Guangdong Entry-Exit Inspection and Quarantine Bureau, No.66 Huacheng Dadao Ave., Zhujiangxincheng, Guangzhou, 510623, China, gd_chenr@sina.com.
Applied Microbiology and Biotechnology
|January 6, 2015
Summary
A novel multiplex assay simultaneously detects five swine viruses, offering a rapid and accurate tool for diagnosing reproductive diseases in pigs. This bead-based method enhances detection rates compared to traditional PCR.
Area of Science:
- Veterinary Virology
- Molecular Diagnostics
- Biotechnology
Background:
- Swine reproductive diseases pose significant economic threats to the swine industry.
- Accurate and rapid diagnosis of multiple viral pathogens is crucial for effective disease management.
- Existing diagnostic methods can be time-consuming and may not efficiently detect mixed infections.
Purpose of the Study:
- To develop and validate a novel multiplex detection array for simultaneous identification of five major swine reproductive viruses.
- To establish a high-throughput, sensitive, and specific diagnostic tool for swine viral diseases.
Main Methods:
- Development of a multiplex assay combining one-step asymmetric multiplex reverse transcription polymerase chain reaction (RT-PCR) with Luminex xMAP bead-based hybridization.
- Utilizing flow cytometry for simultaneous detection of Porcine Reproductive and Respiratory Syndrome Virus (PRRSV), Porcine Circovirus type 2 (PCV-2), Porcine Rotavirus (PRV), Classical Swine Fever Virus (CSFV), and Porcine Parvovirus (PPV).
- Validation using viral strains, plasmid constructs, and field samples, with comparison to conventional PCR and commercial real-time RT-PCR kits.
Main Results:
- The multiplex assay successfully detected and differentiated 23 viral strains, including single and mixed infections.
- Achieved a low detection limit of 2.2-22 copies/μL (0.5-6.8 fg/μL DNA template).
- Demonstrated low intra-assay (2.5–5.4%) and inter-assay (4.1–7.6%) variances, with higher detection rates than uniplex methods and comparable performance to commercial kits for PRRSV detection. Assay completion within 2 hours.
Conclusions:
- The developed bead-based suspension array is a practical, high-throughput tool for specific and sensitive identification of single and multiple swine viral infections.
- This assay significantly improves diagnostic efficiency for major swine reproductive viruses in pigs and boar semen.
- The technology offers a valuable advancement in swine disease surveillance and control strategies.
