Virus split deactivation method for human influenza virus split vaccine
An influenza virus inactivation technology, applied in antiviral agents, pharmaceutical formulations, inactivation/attenuation, etc., can solve the problems of poor uniformity and stability of inactivation, many inactivation steps, poor virus lysis effect, etc. , to achieve the effect of shortening the inactivation time, uniform and thorough cracking, and improving the cracking effect
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Embodiment 1
[0047] Example 1 Production of monovalent stock solution of H1N1 influenza virus
[0048] 1) Chicken embryos for production
[0049] The chicken embryos used for subculture and preparation of virus seeds should come from SPF chickens; the chicken embryos used for vaccine production should come from healthy chickens raised in closed houses, and 9-11 days old chickens with no deformities, clear blood vessels, and activities should be selected. Embryo.
[0050] 2) Virus inoculation and cultivation
[0051] Use PBS (0.01 mol / L, pH 7.2) to dilute the working seed batch virus seeds, and the H1N1 virus seeds are diluted to 4.0LgEID50 / ml. Inoculate the allantoic cavity of chicken embryos, 0.2ml per embryo. Incubate at 33-35°C for 44-48 hours. If the working seeds are not used up after being thawed, they should not be frozen for further use.
[0052] 3) Virus Harvest
[0053] Screen the live chicken embryos, place the embryos at 2-8°C for 12-18 hours, harvest the allantoic fluid ...
Embodiment 2
[0084] Example 2 Production of monovalent stock solution of H3N2 influenza virus
[0085] 1) Chicken embryos for production
[0086] The chicken embryos used for subculture and preparation of virus seeds should come from SPF chickens; the chicken embryos used for vaccine production should come from healthy chickens raised in closed houses, and 9-11 days old chickens with no deformities, clear blood vessels, and activities should be selected. Embryo.
[0087] 2) Virus inoculation and cultivation
[0088] Use PBS (0.01 mol / L, pH 7.2) to dilute the batch virus seeds of the working seeds, dilute the H3N2 type virus seeds to 4.0LgEID50 / ml, inoculate the allantoic cavity of chicken embryos, inoculate 0.2ml per embryo, and culture at 33-35°C for 44- For 48 hours, if the working seeds and poisonous seeds are melted, if they are not used up at one time, they must not be frozen for further use.
[0089] 3) Virus Harvest
[0090] Screen the live chicken embryos, place the embryos at ...
Embodiment 3
[0121] Example 3 Production of Influenza B Monovalent Stock Solution
[0122] 1) Chicken embryos for production
[0123] The chicken embryos used for subculture and preparation of virus seeds should come from SPF chickens; the chicken embryos used for vaccine production should come from healthy chickens raised in closed houses, and 9-11 days old chickens with no deformities, clear blood vessels, and activities should be selected. Embryo.
[0124] 2) Virus inoculation and cultivation
[0125] Use PBS (0.01 mol / L, pH7.2) to dilute the working seed batch virus, dilute the type B virus to a virus amount of 3.0 LgEID50 / ml, inoculate the allantoic cavity of chicken embryos, inoculate 0.2ml per embryo, and place at 33- Incubate at 35°C for 66-72 hours. If the working seeds have been thawed and are not used up once, they must not be frozen for further use.
[0126] 3) Virus Harvest
[0127] Screen the live chicken embryos, place the embryos at 2-8°C for 12-18 hours, harvest the al...
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