The invention belongs to the field of
disease prevention and control in
aquaculture, and particularly relates to a
cyprinid herpesvirus type 3 ORF138
gene inactivated strain as well as a preparation method and application of the
cyprinid herpesvirus type 3 ORF138
gene inactivated strain. The invention belongs to the field of
disease prevention and control in
aquaculture, and particularly relates to a
cyprinid herpesvirus type 3 ORF138
gene inactivated strain as well as a preparation method and application of the cyprinid herpesvirus type 3 ORF138 gene inactivated strain. According to the invention, a
Koi herpesvirus ORF138 gene deleted strain is constructed, and the strain is purified to obtain the gene recombinant
engineering vaccine with
immunogenicity. According to the vaccine, the ORF138 gene is knocked out, the
toxicity is greatly weakened, the morbidity and death probability of immunized fishes is remarkably reduced, the fishes can be induced to better generate immune response, and the vaccine has an immune effect. In addition, the recombinant
genetic engineering vaccine can induce immunized fishes to effectively generate specific antibodies for a long time. Compared with other types of vaccine recombinant
genetic engineering vaccines, the recombinant
genetic engineering vaccine has the
advantage of high immunization rate, and can achieve a better immunization effect in practical application.