Detection and Molecular Diversity of Spike Gene of Porcine Epidemic Diarrhea Virus in China
文献类型: 外文期刊
第一作者: Chen, Jianfei
作者: Chen, Jianfei;Liu, Xiaozhen;Shi, Da;Shi, Hongyan;Zhang, Xin;Li, Changlong;Chi, Yanbin;Feng, Li
作者机构:
关键词: PEDV;S gene;heterogeneity;genetic variation;variants
期刊名称:VIRUSES-BASEL ( 影响因子:5.048; 五年影响因子:5.127 )
ISSN: 1999-4915
年卷期: 2013 年 5 卷 10 期
页码:
收录情况: SCI
摘要: Since late 2010, porcine epidemic diarrhea virus (PEDV) has rapidly disseminated all over the China and caused considerable morbidity and high mortality (up to 100%) in neonatal piglets. 79.66% (141 of 177) pig farms in 29 provinces (excluding Tibet and Hainan, China) and 72.27% (417 of 577) samples were positive for PEDV confirmed by reverse transcription-polymerase chain reaction (RT-PCR). The full-length S genes of representative field strains were sequenced. 33 field strains share 93.5%-99.9% homologies with each other at the nucleotide sequence level and 92.3%-99.8% homologies with each other at the amino acids sequence level. Most field strains have nucleotide deletion and insertion regions, and show lower homologies (93.5%-94.2%) with Chinese classical strain CH/S, however higher homologies (97.1%-99.3%) with recent strain CHGD-1. The phylogenetic analysis showed there are classical strains and variants prevailing in pig herd in China. PEDV has a high detection rate in pig herds in China. Sequence analysis indicated the S genes of recent field strains have heterogeneity and the variants are predominant.
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