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Development of real-time PCR assay for detection of porcine circovirus-like virus P1 in domestic pigs in China

文献类型: 外文期刊

作者: He, Kong-wang 1 ; Wen, Li-bin 2 ; Wang, Yong-shan 2 ; Lu, Cheng-ping 1 ;

作者机构: 1.Nanjing Agr Univ, Coll Vet Med, Nanjing 210095, Jiangsu, Peoples R China

2.Jiangsu Acad Agr Sci, Key Lab Vet Biol Engn & Technol, Natl Ctr Engn Res Vet Bioprod, Inst Vet Med,Minist Agr, Nanjing 210014, Jiangsu, Peoples R China

关键词: Porcine circovirus-like virus P1;PCV2;Fluorescence quantitative PCR;Melting curve

期刊名称:BMC VETERINARY RESEARCH ( 2020影响因子:2.741; 五年影响因子:2.955 )

ISSN: 1746-6148

年卷期: 2015 年 11 卷

页码:

收录情况: SCI

摘要: Background: The porcine circovirus-like agent P1 is a newly discovered DNA virus with a single-stranded circular genome that is highly homologous to that of porcine circovirus type 2. P1 infection can cause symptoms resembling postweaning multisystemic wasting syndrome. This study aims to develop a rapid, sensitive and specific method to detect P1. Results: A pair of primers was designed and used to amplify a 119 bp DNA fragment to generate a recombinant plasmid which was served as the standard. A SYBR I qPCR protocol was established using the P1 recombinant plasmid standard and the sensitivity, specificity and stability of this method was analyzed. The results demonstrate a strong correlation with P1 recombinant plasmid titers when virus DNA copy numbers fall in between 10(0) similar to 10(9) copies/mu L. This method doesn't detect pseudo rabies, porcine parvovirus or porcine reproductive and respiratory syndrome virus; moreover it can distinguish porcine circovirus type 2 from P1 by melting temperature analysis. Coefficient of variation for each batch of reaction is less than 5 %. The serum virus titers of P1 positive in this study were measured by this protocol to be 103 to 107 copies/mL. Conclusions: The established qPCR is sensitive, specific, and reliable, which could be a useful tool when applied to quantification of P1 in a variety of samples from infected pigs.

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