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- W2553525536 abstract "Porcine circovirus type 2 (PCV2) is a causative agent of PCV2-associated disease (PCVAD), which leads to enormous economic losses in the swine industry worldwide. A high nucleotide substitution rate allows for the continuous evolution of PCV2 and the emergence of novel PCV2 strains. However, the distribution of emerging PCV2 genotypes and the co-existence of multiple genotypes in Korea have not been elucidated. The objective of this study was to determine the genetic diversity of PCV2 in Korean pig herds between 2009 and 2016. The overall prevalence of PCV2, from various samples originating from commercial pigs, was 53.8% (325/604). Two cases of a genotype shift to PCV2d at the farm level showed that the genotype shift started before 2012. In addition, genotype-specific PCR, on pen-based oral fluid samples for nationwide PCV2 surveillance in 2016, indicated that the infection pattern of PCV2 genotypes at the farm level was as follows; none (6/69), PCV2a (6/69), PCV2b (2/69), PCV2d (33/69), PCV2a/b (2/69), PCV2a/d (4/69), PCV2b/d (11/69), and PCV2a/b/d (2/69), respectively. This suggests that the genotype shift to PCV2d occurred on a nationwide scale and that the co-existence of different genotypes is common in Korean pig herds. In addition, seven sites on the capsid protein of Korean PCV2 were identified as being under positive selection pressure, all of which are related to the epitope region and neutralization activity. These data provide evidence of increased genetic diversity and shifts among Korean PCV2 isolates." @default.
- W2553525536 created "2016-11-30" @default.
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- W2553525536 date "2017-01-01" @default.
- W2553525536 modified "2023-10-06" @default.
- W2553525536 title "Genotypic diversity of porcine circovirus type 2 (PCV2) and genotype shift to PCV2d in Korean pig population" @default.
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- W2553525536 doi "https://doi.org/10.1016/j.virusres.2016.11.015" @default.
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