仔豬副傷寒活疫苗中耐熱保護(hù)劑應(yīng)用相關(guān)參數(shù)的研究
[Abstract]:[objective] to study and determine the parameters of the application of heat-resistant protective agent in live vaccine of piglet paratyphoid fever, and to provide a reference for the preparation of live vaccine of bacterial heat-resistant protectant. Three kinds of freeze-drying curves (1 ~ 2 ~ 3 ~ 3) were used for freeze-drying, and the freeze-drying curves of heat-resistant protectant were determined by sampling test. On the basis of determining the suitable freeze-drying curve, the heat resistance protectant and the bacteria solution of different ages were further studied. The final concentration of the bacterial solution was 3 脳 10 10 5 脳 1010 and 7 脳 1010 CFU/m L), respectively. The final concentrations of the bacterial solution were 3 脳 10 10 5 脳 1010 and 7 脳 1010 CFU/m L), for 12 ~ 15 ~ 15 ~ 18 and 21 h), respectively. Storage time of different sensitive incubation time (0: 24 and 48 h), respectively) (2-8 擄C) for storage of 0 10, 10, 20, 30 and 40 d), respectively The effect of different dosages (2t3 and 4 m L) on vaccine quality was studied. [results] the results showed that curve 2 had the best effect on product characters, living bacteria survival rate and aging resistance index. The results of culture at 37 擄C for 18 h (located at the end of logarithmic growth or at the early stage of stabilization) showed that the survival rate of freeze-dried bacteria was 78 to 81, which was superior to that of other time, and the optimum final concentration of bacterial solution was 3 脳 10 ~ (-5) 脳 1010 CFU/m / L; The optimum incubation time was 2-8 擄C for 24 hours, the survival rate of freeze-dried bacteria could reach 85.3% and 90.5%, and the test of preservation period of heat-resistant protectant showed that the lyophilization effect of 2-8 擄C for 40 days was basically the same as that for 0 days. The results of seedling matching test showed that the survival rate of lyophilized bacteria was basically the same as that of 2 mL. But the survival rate of live bacteria in aging tolerance test was slightly higher than that in 2 mL. [conclusion] the final concentration of seedling was 3 脳 10 ~ (-5) 脳 1010 CFU/m / L and stored at 2-8 擄C for 40 days. For 24 h, the protective agent and the inoculation liquid were divided quantitatively with 3-4 mL, and freeze-dried according to curve 2 was used as the suitable parameter for the preparation of live vaccine of paratyphoid heat resistance protective agent in piglets.
【作者單位】: 中國(guó)獸醫(yī)藥品監(jiān)察所;北京中海生物科技有限公司;
【基金】:國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(No.2016YFD0500902) 北京市科委企業(yè)提升計(jì)劃項(xiàng)目(No.Z121102002812080)~~
【分類號(hào)】:S859.797
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