First detection and genetic characterization of porcine parvovirus 7 from Korean domestic pig farms

Abstract

Porcine parvovirus 7 (PPV7) was first detected in Korean pig farms in 2017. The detection rate of PPV7 DNA was 24.0% (30/125) in aborted pig fetuses and 74.9% (262/350) in finishing pigs, suggesting that PPV7 has circulated among Korean domestic pig farms. Phylogenetic analysis based on capsid protein amino acid sequences demonstrated that the nine isolated Korean strains (PPV-KA1-3 and PPV-KF1-6) were closely related to the previously reported USA and Chinese PPV7 strains. In addition, the Korean strains exhibit genetic diversity with both insertion and deletion mutations. This study contributes to the understanding of the molecular epidemiology of PPV7 in Korea.

Keywords: Korea; aborted fetus; detection; pig farm; porcine parvovirus 7.

Fig. 1. Phylogenetic tree constructed based on the capsid protein (VP) sequences. Phylogenetic tree of VP sequences was derived from 39 Parvovirinae genomes. The tree was inferred from amino acid sequences of the VP by applying the maximum-likelihood method using the LG + F + I model with 1,000 bootstrap resampling iterations. The Korean porcine parvovirus 7 (PPV7) strains identified in this study are represented by black circles.