Pathogenicity and immunogenicity of a gE/gI/TK gene-deleted pseudorabies virus variant in susceptible animals

文献类型： 外文期刊

第一作者： Cong, Xin

作者： Cong, Xin;Lei, Jian-Lin;Xia, Shui-Li;Wang, Yi-Min;Li, Yongfeng;Li, Su;Luo, Yuzi;Sun, Yuan;Qiu, Hua-Ji

作者机构：

关键词： Pseudorabies virus;gE/gI/TK-gene-deleted mutant;Pathogenicity;Immunogenicity;Susceptible animals

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： A pseudorabies virus (PRV) variant with enhanced pathogenicity has emerged in many vaccinated swine herds in China since 2011. rPRVTJ-delgE/gI, a previously described gE/gI-deleted PRV based on the PRV variant TJ strain, has been shown to be avirulent to pigs yet virulent to sheep. To ensure desirable biosafety, we further deleted the thymidine kinase (TIC) gene of rPRVTJ-delgE/gI to generate a gE/gI/TK-deleted mutant rPRVTJ-delgE/gI/TK, and evaluated its pathogenicity and immunogenicity in susceptible animals. Groups of mice (n = 5), sheep (n = 3), and pigs (n=4) were inoculated with different doses of rPRVTJ-deIgE/gI/TK or rPRVTJ-delgE/gI, and clinical signs, viral shedding, pathological changes, and serum antibodies were examined following inoculation. The results showed that rPRVTJ-delgE/gI/TK displayed higher safety than rPRVTJ-delgE/gI for mice (10(3)-10(6) TCID50) and sheep (10(5) TCID50), and pigs inoculated with rPRVTJ-delgE/gI/TK (10(5) TCID50) induced PRV-specific antibodies and protection against lethal PRV challenge comparable to those immunized with rPRVTJ-delgE/gI. In conclusion, rPRVTJ-delgE/gI/TK has the potential to be developed as a vaccine for controlling the currently prevalent PR in China. (C) 2015 Elsevier B.V. All rights reserved.

分类号： S8

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