Chicken subunit bivalent vaccine, as well as preparation and application thereof
A dual vaccine and vaccine adjuvant technology, applied in the direction of antiviral agents, virus antigen components, etc., can solve problems such as interference with laboratory diagnosis of virus isolation, easy to cause respiratory side effects, and immune susceptibility to maternal antibody interference.
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[0010] The main structural protein VP2 protein of IBDV is the most important host protective antigen. The present invention amplifies the super-virulent VP2 gene of IBD by PCR method, clones it on the pET-28a vector, transforms BL21(DE3), and induces it with IPTG After the VP2 protein is expressed, the expressing cells are homogenized under high pressure and then centrifuged to obtain the supernatant, which is the VP2 protein solution.
[0011] Newcastle disease virus Clone30 strain was inoculated into 10-day-old SPF embryos, and the embryos cultured for 72-120 hours after inoculation were selected to harvest the embryo fluid. The virus fluid was concentrated by ultrafiltration and concentration, and 0.1% formaldehyde was added to the final concentration.
[0012] Mix the VP2 protein solution with the Newcastle disease virus solution and then emulsify the vaccine.
[0013] The chicken Newcastle disease-infectious bursal virus VP2 subunit dual vaccine of the present invention w...
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