Genetic characterization of a new pandemic Southeast Asia topotype strain of serotype O foot-and-mouth disease virus isolated in China during 2010

文献类型： 外文期刊

第一作者： Zheng, Haixue

作者： Zheng, Haixue;He, Jijun;Guo, Jianhong;Jin, Ye;Yang, Fan;Lv, Lv;Liu, Xiangtao

作者机构：

关键词： Foot-and-mouth disease;Southeast Asia topotype;Full-length sequence

期刊名称：VIRUS GENES （ 影响因子：2.332； 五年影响因子：2.0 ）

ISSN： 0920-8569

年卷期： 2012 年 44 卷 1 期

页码：

收录情况： SCI

摘要： The full-length nucleotide sequence of the foot-and-mouth disease virus O/BY/CHA/2010 strain, Mya-98 lineage of Southeast Asia (SEA) topotype, was determined and compared with O/HKN/20/2010 and other known FMDV strains. Homology analysis indicated > 98.0% nucleotide identity between O/BY/CHA/2010 and the epidemic strains, O/HKN/20/2010, and O/VN/2009. However, with the exception of the VP4, 2A, and 3BCD regions, O/BY/CHA/2010 showed a lower similarity with SEA topotype strains, O/VN/2006, and HLJOC12/03. A comparison of O/BY/CHA/2010 with non-SEA topotype strains showed the highest level of homology (97.4-100%) with UKG/7B/2007, Akesu/58, and the PanAsia strains in the 2A, P2, and 3CD regions, which suggested the presence of similar characteristics among these strains. Phylogenetic analysis revealed that O/BY/CHA/2010 is clustered in the Mya-98 lineage of the SEA topotype and is linked to four other isolates: HKN/20/2010, O/VN/2009, O/VN/2006, and HLJOC12/03. The VP1-based phylogenetic tree was divided into distinct clusters according to the different topotypes, while other gene-based phylogenetic trees exhibited some degree of intercrossing among topotypes. Furthermore, sequence analysis of the Lpro gene revealed a single amino acid insertion in O/HKN/20/2010 and a single amino acid deletion in O/BY/CHA/2010, in addition to a 70-nucleotide deletion within the 5'-untranslated region of O/HKN/20/2010. The majority of strains were shown to be homologous in the pseudoknots region although some exceptions were noted. This study provides a comprehensive genetic characterization of a novel FMDV isolate of the Mya-98 lineage.

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