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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

Active Publication Date: 2009-07-08
RINGPU (BAODING) BIOLOGICAL PHARMACEUTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, although the use of vaccines has effectively controlled the disease, due to the unsatisfactory immune effect of the vaccine, the enhanced virulence of the epidemic strains and the uneven level of my country's chicken industry, the disease is still a serious threat to my country's chicken industry. One of the diseases of the poultry industry, atypical Newcastle disease often occurs in my country, and even the outbreak of typical Newcastle disease
[0009] At present, the vaccines used to prevent and control the disease mainly include live vaccines and inactivated vaccines. Among them, live vaccines include attenuated vaccines II, III, IV and moderately virulent vaccines I [2]. The disadvantage of attenuated vaccines is that they cannot break through Interference from maternal antibodies, although moderately virulent vaccines can break through the influence of maternal antibodies and produce antibodies quickly, they can cause chickens to become sick and have the risk of spreading the virus. It is reported that they can cause atypical Newcastle disease in chickens
Inactivated vaccines are mainly oil emulsion inactivated vaccines, which can avoid the influence of maternal antibodies and have no risk of spreading the virus, and are suitable for immunization of chickens of any age; The dose is constantly increasing, which brings inconvenience to immunization, and the side effects of vaccine immunization are enhanced, and malabsorption or granuloma often occurs at the inoculation site, which affects the quality of poultry products and causes certain losses to the poultry industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention provides a method for producing improved concentrated inactivated vaccine against Newcastle disease. The method comprises the steps of virus inoculation passage, ultrafiltration and concentration, mixing water phase and oil phase and the like, wherein, a 30KD membrane is used for ultra-filtrating and concentrating, and the concentrated water phase and oil phase are mixed and emulsified in the proportion of 1 to 1 in a high pressure emulsification pump. The invention uses ultrafilter membrane concentration and antigen ingredient instead of the content of live virus, so that the chicken can produce strong immunity after being immunized by the vaccine for 10 to 14 days; the immunity period is 10 months; the anti-virus protective rate is 100 percent within the immunity period; and the invention has wide application prospect.

Description

technical field [0001] The invention relates to an improvement of a vaccine production technology, in particular to an improvement method of a concentrated inactivated Newcastle disease vaccine concentration technology. Belongs to the field of bioengineering. Background technique [0002] Newcastle disease virus (Newcastlediseasevirus, NDV) is also known as Asian fowl plague virus, pseudo fowl plague virus or avian pneumoencephalitis virus. The position in virus taxonomy belongs to Paramyxoviridae (Paramyxoviridae), a species in Paramyxovirus genus (Paramyxovirus). The virus mainly harms chickens, guinea fowls and turkeys, and spreads rapidly among the infested flocks, and the virulent strain can destroy the whole flock of chickens. Attenuated strains only cause respiratory tract infection and decreased egg production in chickens, but they can recover quickly. Humans can develop conjunctivitis or lymphadenitis due to contact with sick birds and live virus vaccines, but re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K39/17A61P31/14
Inventor 熊蕊杨保收
Owner RINGPU (BAODING) BIOLOGICAL PHARMACEUTICAL CO LTD
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