Carp spring viraemia oral vaccine capable of being added into feed
A technology of carp spring viremia and oral vaccine, which is applied in the field of carp disease immunization and prevention, can solve the problems of lag in basic research work, economic losses of farmers, and complexity of breeding environmental factors, and achieves an effect that is conducive to absorption
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[0034] An oral vaccine against carp spring viremia that can be added to feed is prepared through the following steps:
[0035] (1) Cloning and expression of the G protein gene of carp spring viremia virus: the G protein gene was amplified from the preserved SVCV virus by PCR; reaction system: 2×PCR Master Mix 25 μl, 10 μM primers (SVG-F: 5'-CATGCCATGGATGTCTATCATCATCAGCTACATCGCA-3'(SEQ ID No.1), SVG-R:5'-CGAGCTCAACGAAGGACCGCATTTCG-3'(SEQ ID No.2) each 1μl, template 3μl, make up to 50μl with double distilled water; amplification reaction Conditions: pre-denaturation at 95°C for 4min; denaturation at 94°C for 45s, annealing at 55°C for 45s, extension at 72°C for 1min, and 35 cycles at 72°C for 10min). The amplified fragment was cloned into the pMD18-T vector, and then transformed into Escherichia coli DH5α to select positive clone strains. After being identified by Nco I and Sac I double enzyme digestion, it was connected to the intermediate bridge plasmid pET30a-G, and then the...
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