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Chinese Journal of Biotechnology ; (12): 1679-1690, 2014.
Article in Chinese | WPRIM | ID: wpr-345555

ABSTRACT

In order to determine immunogenicity and protective effect in chickens, we used the IBDV (Infectious bursal disease virus)-Vp2/Lactobacillus casei as antigen transfer system. First, the immunized and control chickens were challenged by IBDV/DQ at lethal dose to determine the protective ratio. Second, chickens were orallyand intranasally vaccinated twice with 10(9) CFU/mL pLA-VP2/L. casei, pLA/L. casei and PBS as negativecontrol and commercial vaccine as positive control. The bursa injury and the lesion score wererecorded post challenge. The level of specific IgG and sIgA in pLA-VP2/L. casei and positive control groups was significantly higher than that in negativecontrol groups. The protection efficacy in pLA-VP2/L. casei oral group was higher than that inintranasal group. The SI. of pLA-VP2/L. casei oral group was significant higher than other groups. The lesion score indicated the pLA-VP2/L. casei was safer than commercial vaccine for bursa. Collectively, the pLA-VP2/L. casei could be a vaccine candidate for IBDV.


Subject(s)
Animals , Antibodies, Viral , Blood , Antibody Formation , Birnaviridae Infections , Chickens , Infectious bursal disease virus , Lacticaseibacillus casei , Poultry Diseases , Recombinant Proteins , Allergy and Immunology , Viral Structural Proteins , Allergy and Immunology , Viral Vaccines , Allergy and Immunology
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