Method for producing concentrated inactivate vaccine for newcastle disease
A technology for chicken Newcastle disease and a production method, which is applied in the field of bioengineering and can solve the problems of enhanced immune side reactions of vaccines, malabsorption, granulomas and the like
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Embodiment 1
[0028] Chicken Newcastle disease virus attenuated LaSota strain was used as the virus seed, inoculated with 10-day-old SPF chicken embryos, harvested chicken embryo fluid that died 72-120 hours after inoculation and had obvious disease scars, and used Milipore ultrafiltration membrane with a cut-off molecular weight of 30KD for NDV chicken embryo fluid Concentrate, add formalin solution after concentration to make the content reach 0.2%. Shake well and inactivate at 37°C for 16 hours. Before inactivation, the virus content was measured according to the ministerial standard, and the virus content was >108.8EID50 / 0.1ml. Take the inactivated virus liquid and inoculate 6 SPF chicken embryos, observe for 5 days, and no more than 1 chicken embryo will die non-specifically. Measure the hemagglutination value of all the embryonic fluids separately, and prepare them for use when no hemagglutination occurs. Add sterile 5% Tween-80 to the inactivated venom to form the water phase; add ...
Embodiment 2
[0031] Inoculate 10-day-old SPF chicken embryos with the attenuated LaSota strain of Newcastle disease virus. Harvest the chicken embryo liquid that died 72-120 hours after inoculation and had obvious disease scars. The NDV chicken embryo liquid was concentrated with a Milipore ultrafiltration membrane with a molecular weight cut-off of 30KD. Add formalin solution to make the content reach 0.2%. Shake well and inactivate at 37°C for 16 hours. The inactivated virus liquid is tested for inactivation, and the completely inactivated venom is used for future use. Add sterile 5% Tween-80 to the inactivated venom to form the water phase; add 6% Siben-80 to No. 10 white oil, and then add 2% aluminum stearate to form the oil phase after sterilization. Mix and emulsify the water phase and the oil phase in a high-pressure emulsification pump at a ratio of 1:1 to form a concentrated inactivated Newcastle disease vaccine with a virus content of >108.8EID50 / 0.1ml.
[0032] The vaccine is ...
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