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Research Article Open access CC BY 3.0

Concurrent Infection of Torque Teno Sus Virus and Porcine Circovirus Type 2 in a Clinical Case with Post-weaning Multisystemic Wasting Syndrome

Shao-Lun Zhai, Jin-Xue Long, Qin-Ling Chen, Man-Lin Luo, Wen-Kang Wei, Shi-Shan Yuan

Microbiology Research Journal International · pp. 607–615 · Published 20 Feb 2014

10.9734/BMRJ/2014/6336

Abstract

Aims: The goal of this study was to identify possible concurrent infection of torque teno sus virus (TTSuV) and porcine circovirus type 2 (PCV2) in a clinical case with post-weaning multisystemic wasting syndrome (PMWS) on certain farm of Shanghai, China. Place and Duration of Study: Department of Swine Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, between June 2009 and June 2010 & Institute of Animal Health, Guangdong Academy of Agricultural Sciences, between September and November, 2013. Methodology: Multiply-primed rolling-circle amplification (MPRCA), a useful molecular tool, was performed to amplify genome sequence of TTSuV and PCV2. For serum sample of SH0822 from a clinical case with PMWS, the products of MPRCA were digested using EcoR I, Xba I, Sma I, Sac I, respectively. Moreover, Clustal W program (DNASTAR software) and MEGA 5.1 software (neighbour-joining method) was used to analysis its nucleotide homology and genetic relationship. Results: Restriction digestion analysis showed one TTSuV genome-size fragment was presented in 1.2 % agarose gel, moreover, another PCV2 genome-size fragment was also presented. Nucleotide sequencing and phylogenetic analysis results suggested that its complete genome were 2823-nucleotide size and 1767-nucleotide size and they were divided into species TTSuV1b and genotype PCV2b, respectively. Conclusion: Concurrent infection of TTSuV and PCV2 in a clinical case with PMWS was identified using MPRCA combining with restriction endonuclease digestion, which indicated that MPRCA was an effective tool to attain simultaneous detection and genome amplification of TTSuV and PCV2.

Torque teno sus virus porcine circovirus type 2 multiply-primed rolling-circle amplification complete genome genetic relationship

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