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Detection of PCV2 DNA by SYBR Green I-based quantitative PCR

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Abstract

We developed an assay for the detection and quantitation of porcine circovirus type 2 (PCV2) with the SYBR Green I-based real-time PCR. The real-time PCR provides a broad dynamic range, detecting from 103 to 1011 copies of DNA per reaction. No cross-reactions were found in specimens containing PCV1. Because of the high sensitivity and specificity of the assay with a relatively rapid and simple procedure, real-time PCR can be used as a routine assay for the clinical diagnosis of PCV2 infection. In this study we applied real-time PCR assay to 80 clinical samples, collected from 40 pigs with postweaning multisystemic wasting syndrome (PMWS) and 40 healthy pigs in comparison with conventional PCR assay. In 56 of 80 samples, PCV2 DNA was detected by conventional PCR assay. All samples positive for PCV2 DNA in conventional PCR assay were also positive in real-time assay, and 12 of 24 samples that tested negative for PCV2 DNA in the conventional assay were tested positive in real-time PCR assay. Real-time PCR assay increased the number of samples in which PCV2 was detected by 15%. It is, therefore, considered to be a useful tool for the detection of PCV2.

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Correspondence to Fang Wei-huan.

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Yang, Zz., Habib, M., Shuai, Jb. et al. Detection of PCV2 DNA by SYBR Green I-based quantitative PCR. J. Zhejiang Univ. - Sci. B 8, 162–169 (2007). https://doi.org/10.1631/jzus.2007.B0162

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  • DOI: https://doi.org/10.1631/jzus.2007.B0162

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