Replication and virulence in pigs of the first African swine fever virus isolated in China

文献类型： 外文期刊

第一作者： Zhao, Dongming

作者： Zhao, Dongming;Liu, Renqiang;Li, Fang;Wang, Jingfei;Zhang, Jiwen;Liu, Xing;Wang, Lulu;Chen, Weiye;Wang, Xijun;Bu, Zhigao;Zhang, Xianfeng;Zhang, Jiaoer;Wu, Xinzhou;Guan, Yuntao;He, Xijun;Bu, Zhigao

作者机构：

关键词： African swine fever virus; virus isolation; animal study; pig; transmission

期刊名称：EMERGING MICROBES & INFECTIONS （ 影响因子：7.163； 五年影响因子：7.329 ）

ISSN： 2222-1751

年卷期： 2019 年 8 卷 1 期

页码：

收录情况： SCI

摘要： African swine fever (ASF) entered China in August 2018 and rapidly spread across the entire country, severely threatening the Chinese domestic pig population, which accounts for more than 50% of the pig population worldwide. In this study, an ASFV isolate, Pig/Heilongjiang/2018 (Pig/HLJ/18), was isolated in primary porcine alveolar macrophages (PAMs) from a pig sample from an ASF outbreak farm. The isolate was characterized by using the haemadsorption (HAD) test, Western blotting and immunofluorescence, and electronic microscopy. Phylogenetic analysis of the viral p72 gene revealed that Pig/HLJ/18 belongs to Genotype II. Infectious titres of virus propagated in primary PAMs and pig marrow macrophages were as high as 10(7.2) HAD(50)/ml. Specific-pathogen-free pigs intramuscularly inoculated with different virus dosages at 10(3.5)-10(6.5) HAD(50) showed acute disease with fever and haemorrhagic signs. The incubation periods were 3-5 days for virus-inoculated pigs and 9 days for contact pigs. All virus-inoculated pigs died between 6-9 days post-inoculation (p.i.), and the contact pigs died between 13-14 days post-contact (p.c.). Viremia started on day 2 p.i. in inoculated pigs and on day 9 p.c. in contact pigs. Viral genomic DNA started to be detected from oral and rectal swab samples on 2-5 days p.i. in virus-inoculated pigs, and 6-10 days p.c. in contact pigs. These results indicate that Pig/HLJ/18 is highly virulent and transmissible in domestic pigs. Our study demonstrates the threat of ASFV and emphasizes the need to control and eradicate ASF in China.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序