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Immune response and protection in gibel carp, Carassius gibelio, after vaccination with beta-propiolactone inactivated cyprinid herpesvirus 2

文献类型： 外文期刊

作者： Zhang, Linlin 1 ; Ma, Jie 2 ; Fan, Yuding 2 ; Zhou, Yong 2 ; Xu, Jin 2 ; Liu, Wenzhi 2 ; Gu, Zemao 1 ; Zeng, Lingbing 1 ;

作者机构： 1.Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China

2.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430223, Peoples R China

关键词： Gibel carp (Carassius gibelio);Cyprinid herpesvirus 2 (CyHV-2);Inactivated vaccine;Immune responses;Efficacy of protection

期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.581； 五年影响因子：4.851 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Herpesviral haematopoietic necrosis (HVHN) of gibel carp (Carassius gibelio) is a newly emerged infectious disease caused by cyprinid herpesvirus 2 (CyHV-2) and has caused huge economic losses in aquaculture operations. Currently, no effective methods are available for the control of the disease. In this study, beta-propiolactone inactivated cyprinid herpesvirus 2 (CyHV-2) vaccine was prepared, and the immune response and protection in cultured gibel carp after vaccination was thoroughly investigated. This included blood cell counting and classification, phagocytic activity, lysozyme and superoxide dismutase activity, neutralizing antibody titration, immune gene expression analysis, and determination of the relative percent survival in vaccinated gibel carp. The results of blood cell counts indicated that the numbers of the red and white blood cells in the peripheral blood of immunized gibel carp increased significantly at day 4 and day 7 after vaccination (p < 0.01). The differential leukocyte count of neutrophils and monocytes were significantly different compared to the control group at day 4 and 7 and the percentage of lymphocytes reached a peak at day 21. The phagocytic percentage and phagocytic index peaked at day 4 post-vaccination. The lysozyme activity and superoxide dismutase activity were significantly increased compared to the control group (p < 0.01). The serum neutralizing antibody titer peaked (203.03 +/- 13.44) at day 21. The qPCR analysis revealed that the expression of the immune genes interlukin 11 and complement component C3 were significantly up-regulated in the immunized group. The challenge test demonstrated that the immunized group had a relative survival rate of 71.4%. These results indicate that the inactivated CyHV-2 vaccine induced both non-specific and specific anti-viral immune responses that resulted in significant protection against HVHN disease and mortality in gibel carp. (C) 2016 Elsevier Ltd. All rights reserved.

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