Authors: ShaoLun Zhai ShengNan Chen Wei Liu XiaoPeng Li SuFang Deng XiaoHui Wen ManLin Luo DianHong Lv WenKang Wei RuiAi Chen
Publish Date: 2016/08/16
Volume: 161, Issue: 11, Pages: 3237-3244
Abstract
Porcine circovirus type 2 PCV2 is considered the major etiological pathogen of porcine circovirusassociated diseases PCVADs in pigs Recently PCV2 was also found in nonporcine animals such as cattle rats and mice However there was no record of PCV2 in rats in China The goal of this study was to investigate whether PCV2 was present in rats Rattus norvegicus RN on three swine farms using molecular tools PCR results showed that 30 of 95 316 rat samples were positive for PCV2 Moreover further genotype analysis suggested that 10 of 30 333 were positive for PCV2a 19 of 30 633 were positive for PCV2b and only one sample 1/30 333 was coinfected by PCV2a and PCV2b To determine the possible origin of PCV2 60 serum samples were also collected from weaned pigs on those swine farms and 23 out of 60 samples were positive for PCV2 In addition two distinct RNorigin and two distinct porcineorigin PCV2 fulllength nucleotide sequences were obtained from the farms Sequence and phylogenetic analysis indicated that they had the highest nucleotide similarity and closest genetic relationships to each other In this study we report the infection and genome characterization of PCV2 in rats and compare RNorigin and porcineorigin PCV2 sequences obtained from the same pig farm revealing possible crossspecies transmission of PCV2We are very grateful to three anonymous reviewers for the critical review This study was supported by Grants No 2013B060500063 No 2014B040404061 No 2016A040401012 and No 2015A020208008 from the Guangdong Provincial Department of Science and Technology and a Grant No 201508020055 from the Guangzhou Science Technology and Innovation Commission
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