Novel ORF5 deletion of NADC30-like porcine reproductive and respiratory syndrome viruses circulating in northern China from 2016 to 2018

文献类型： 外文期刊

第一作者： Sun, Ying-Feng

作者： Sun, Ying-Feng;Jiang, Xuan;Ma, Ji-Fei;Xu, Cheng-Qian;Yu, Xiao-Xue;Yu, Hai;Yu, Hai;Li, Liu-an

作者机构：

关键词： NADC30-like porcine reproductive and respiratory syndrome viruses; novel deletion

期刊名称：JOURNAL OF VETERINARY DIAGNOSTIC INVESTIGATION （ 影响因子：1.279； 五年影响因子：1.522 ）

ISSN： 1040-6387

年卷期： 2020 年 32 卷 6 期

页码：

收录情况： SCI

摘要： North American porcine reproductive and respiratory syndrome virus (NA-PRRSV), especially NADC30-like PRRSV, has evolved and is prevalent in China. We collected 503 samples from pig breeding farms across 4 provinces in northern China from 2016 to 2018. The samples were screened by PCR testing with specific primers that could differentiate groups of NA-PRRSV; phylogenetic trees were constructed and analyzed. Overall, 175 of 503 (34.8%) samples were positive for NA-PRRSV. Dual (NADC30-like and highly pathogenic [HP]-PRRSV; NADC30-like and typical PRRSV; HP and typical PRRSV) and triple (NADC30-like, HP, and typical PRRSV) infections (92 of 175, 52.6%) were common in coinfections by NADC30-like and HP-PRRSV. Notably, 18 of 125 (14.4%) semen samples were positive for PRRSV, and 17 of the 18 positive semen samples contained NADC30-like PRRSV. Phylogenetic analysis based on GP5 amino acids revealed that the novel NADC30-like PRRSV with a unique single amino acid deletion at position 34 has become widespread and has evolved into a new subgroup.

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