Evaluation of cross-protection against three topotypes of serotype O foot-and-mouth disease virus in pigs vaccinated with multi-epitope protein vaccine incorporated with poly(I:C)

文献类型: 外文期刊

第一作者: Cao, Yimei

作者: Cao, Yimei;Lu, Zengjun;Li, Dong;Fan, Pengju;Sun, Pu;Bao, Huifang;Fu, Yuanfang;Li, Pinghua;Bai, Xingwen;Chen, Yingli;Xie, Baoxia;Liu, Zaixin

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关键词: Foot-and-mouth disease virus;Multi-epitope protein vaccine;Cross-protection;Pig;50% Protective dose

期刊名称:VETERINARY MICROBIOLOGY ( 影响因子:3.293; 五年影响因子:3.599 )

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收录情况: SCI

摘要: Epitope-based vaccines are always questioned for their cross-protection against the antigenically variable foot-and-mouth disease virus (FMDV). In this study, we proved the cross-protection effect of a multi-epitope vaccine incorporated with poly(I:C) against three topotypes of 0 type FMDV. A total of 45 naive pigs were vaccinated with different doses of multi-epitope protein vaccine incorporated with poly(I:C). At 28 days post-vaccination, 45 vaccinated and 6 unvaccinated control pigs (two pigs for each group) were challenged with three topotypes of virulent 0 type FMDV, namely, O/Mya/98 (Southeast Asia topotype), O/HN/CHA/93 (Cathay topotype) and O/Tibet/CHA/99 (PanAsia topotype) strains. All unvaccinated pigs developed generalised FMD clinical signs. Results showed that all pigs (n = 15) conferred complete protection against the O/Mya/98 and O/HN/CHA/93 FMDV strains, 11 of which were protected against the O/Tibet/CHA/99 FMDV strain. The 50% protective dose values of the vaccine against the O/Mya/98, O/HN/CHA/93 and O/Tibet/CHA/99 FMDV strains were 15.59, 15.59 and 7.05, respectively. Contact challenge experiment showed that transmission occurred from the donors to the unvaccinated but not to vaccinated pigs. These results showed that vaccination with multi-epitope protein vaccine incorporated with poly(I:C) can efficiently prevent FMD in pigs

分类号: S8

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