文献类型: 外文期刊
第一作者: Chang, Huiyun
作者: Chang, Huiyun;Ma, Yanbin;Lin, Tong;Cong, Guozheng;Du, Junzheng;Ma, Jinling
作者机构:
关键词: FMDV;Yak;Gene mutation;Carrier status
期刊名称:VIROLOGY JOURNAL ( 影响因子:4.099; 五年影响因子:3.719 )
ISSN: 1743-422X
年卷期: 2013 年 10 卷
页码:
收录情况: SCI
摘要: Background: The carrier status of foot-and-mouth disease virus (FMDV) is complicated, and the role of carrier animals in virus transmission is controversial. To investigate the carrier status of FMDV in animals that live in high altitude, Bos grunniens yaks were infected experimentally with FMDV O/Akesu/58. Results: All of the yaks showed clinical signs of foot-and-mouth disease (FMD). Total antibody levels against FMDV measured by liquid-phase blocking enzyme-linked immunosorbent assay (LPB-ELISA) and antibody levels against nonstructural proteins (NSP) showed dynamic changes. Three of the five yaks were indentified as carrier animals by RT-PCR method, and the OP fluids from carrier yaks can cause cytopathic effect (CPE) on BHK-21 cells. At last, five persistent infection strains were isolated. Nucleotide mutations of VP1 gene were analyzed. Conclusions: After infected with FMDV, all of the yaks showed typical clinical signs. Yaks can keep carrier status for at least 8 months. Total antibody levels against FMDV measured by LPB-ELISA and antibody levels against NSP were at high level for carrier yaks. Sequence alignment of the five isolated strains showed obvious gene and protein mutations.
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