A direct real-time polymerase chain reaction assay for rapid high-throughput detection of highly pathogenic North American porcine reproductive and respiratory syndrome virus in China without RNA purification
文献类型: 外文期刊
作者: Kang, Kang 1 ; Yang, Keli 3 ; Zhong, Jiasheng 2 ; Tian, Yongxiang 3 ; Zhang, Limin 2 ; Zhai, Jianxin 4 ; Zhang, Li 4 ; So 1 ;
作者机构: 1.Northwest A&F Univ, Coll Anim Sci & Technol, Yangling 712100, Shaanxi, Peoples R China
2.Shenzhen Univ, Coll Life Sci, Shenzhen Key Lab Microbial Genet Engn, Shenzhen 518060, Peoples R China
3.Hubei Acad Agr Sci, Inst Anim Husb & Vet, Hubei Key Lab Anim Embryo & Mol Breeding, Wuhan 430064, Peoples R China
4.Shenzhen Ao Dong Inspect & Testing Technol Co Ltd, Shenzhen 518000, Peoples R China
5.Guangdong Acad Agr Sci, Vet Med Inst
关键词: Highly pathogenic;Porcine reproductive and respiratory syndrome virus;Real-time RT-PCR
期刊名称:JOURNAL OF ANIMAL SCIENCE AND BIOTECHNOLOGY ( 影响因子:5.032; 五年影响因子:5.922 )
ISSN: 2049-1891
年卷期: 2014 年 5 卷
页码:
收录情况: SCI
摘要: Background: Porcine reproductive and respiratory syndrome virus (PRRSV), and particularly its highly pathogenic genotype (HP-PRRSV), have caused massive economic losses to the global swine industry. Results: To rapidly identify HP-PRRSV, we developed a direct real-time reverse transcription polymerase chain reaction method (dRT-PCR) that could detect the virus from serum specimen without the need of RNA purification. Our dRT-PCR assay can be completed in 1.5 h from when a sample is received to obtaining a result. Additionally, the sensitivity of dRT-PCR matched that of conventional reverse transcription PCR (cRT-PCR) that used purified RNA. The lowest detection limit of HP-PRRSV was 6.3 TCID50 using dRT-PCR. We applied dRT-PCR assay to 144 field samples and the results showed strong consistency with those obtained by cRT-PCR. Moreover, the dRT-PCR method was able to tolerate 5-20% (v/v) serum. Conclusions: Our dRT-PCR assay allows for easier, faster, more cost-effective and higher throughput detection of HP-PRRSV compared with cRT-PCR methods. To the best of our knowledge, this is the first report to describe a real-time RT-PCR assay capable of detecting PRRSV in crude serum samples without the requirement for purifying RNA. We believe our approach has a great potential for application to other RNA viruses.
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