为解决鸽新城疫灭活疫苗免疫效力评价中的标准鸽缺失问题,筛选满足要求的试验鸽。2019年3月对鸽场饲养管理和鸽群发病史情况进行调研,筛选合格鸽场;采血进行鸽新城疫抗体检测,排除高母源抗体鸽群;进一步检测鸽圆环、鸽腺病毒和鸽痘,排...为解决鸽新城疫灭活疫苗免疫效力评价中的标准鸽缺失问题,筛选满足要求的试验鸽。2019年3月对鸽场饲养管理和鸽群发病史情况进行调研,筛选合格鸽场;采血进行鸽新城疫抗体检测,排除高母源抗体鸽群;进一步检测鸽圆环、鸽腺病毒和鸽痘,排除感染上述易感病原鸽群;最后对选定的鸽隔离饲养一定时间,排除潜在的病原感染;采用筛选鸽进行鸽新城疫灭活苗免疫攻毒试验,验证是否满足试验的需求。通过调研,确定3家鸽场,从1月龄左右鸽群中随机选择50羽健康鸽进行检测,ND母源抗体为0~1∶32不等,均无鸽腺病毒感染,但有个别鸽存在圆环抗体或携带鸽痘病毒。从其中2家鸽场购回HI抗体≤1∶4,且无其他病原感染风险的鸽各25羽进行鸽新城疫灭活疫苗免疫攻毒试验,血清学检测结果显示,免疫组鸽免后28 d ND HI抗体在1∶16~1∶64之间,均值在1∶32以上;攻毒保护结果为,免疫组17/20~19/20保护,对照组均5/5发病,3~4羽死亡。通过鸽场调研初筛、新城疫HI抗体检测、鸽常见病原检测、隔离观察等步骤筛选的实验鸽可满足鸽新城疫灭活疫苗效力评价试验的要求,且结果稳定可靠。通过该研究筛选的实验鸽,满足试验需求、提高研究结果的可靠性和重复性,并在保证鸽用疫苗质量方面具有重要意义。展开更多
[ Objective] The aim of this study was to evaluate the clinical effect of the inactivated vaccine in oil emulsion against Newcastle disease and Fowl cholera, and provide conditions for combined prevention and control ...[ Objective] The aim of this study was to evaluate the clinical effect of the inactivated vaccine in oil emulsion against Newcastle disease and Fowl cholera, and provide conditions for combined prevention and control of Newcastle disease and Fowl cholera. [ Method] The mixture of avian pasteurella multocida （type A） virulent strain 1502 and Newcastle disease virus attenuated strain La Sota was prepared into five batches of the inactivated vaccine in oil emulsion to use in the field test for assessing its safety and effects on immune protection of chicken, duck and goose. [ Result] The field safety test showed that there was no adverse reaction in the vaccinated chickens, ducks and geese. The field test of immune effect for chickens suggested that the titers of hemagglutination inhibition antibody for Nescastle disease virus （ ND-HI ） in 7 - 14 day- old chickens and 60 -90 day-old young chickens were 2 -3 log2 higher than the control group after being vaccinated for 3 weeks, which could last for more than 4 months. The protection rate against avian pasteurella multocida was over 75.0% and its immune effect could last for 6 months. The field test of immune effect for duck and goose indicated that the titers of ND-HI antibody were all higher than 4.2 log2 in vaccinated ducks and geese while lower than 2 log2 in the control group after being vaccinated for 3 weeks. The protection rate against avian pasteurella multocida in vaccinated ducks and geese was higher than 75.0% and 62.5% respectively. [ Conclusion] The binary vaccine is safe for poultry and has good immune effects.展开更多
文摘为解决鸽新城疫灭活疫苗免疫效力评价中的标准鸽缺失问题,筛选满足要求的试验鸽。2019年3月对鸽场饲养管理和鸽群发病史情况进行调研,筛选合格鸽场;采血进行鸽新城疫抗体检测,排除高母源抗体鸽群;进一步检测鸽圆环、鸽腺病毒和鸽痘,排除感染上述易感病原鸽群;最后对选定的鸽隔离饲养一定时间,排除潜在的病原感染;采用筛选鸽进行鸽新城疫灭活苗免疫攻毒试验,验证是否满足试验的需求。通过调研,确定3家鸽场,从1月龄左右鸽群中随机选择50羽健康鸽进行检测,ND母源抗体为0~1∶32不等,均无鸽腺病毒感染,但有个别鸽存在圆环抗体或携带鸽痘病毒。从其中2家鸽场购回HI抗体≤1∶4,且无其他病原感染风险的鸽各25羽进行鸽新城疫灭活疫苗免疫攻毒试验,血清学检测结果显示,免疫组鸽免后28 d ND HI抗体在1∶16~1∶64之间,均值在1∶32以上;攻毒保护结果为,免疫组17/20~19/20保护,对照组均5/5发病,3~4羽死亡。通过鸽场调研初筛、新城疫HI抗体检测、鸽常见病原检测、隔离观察等步骤筛选的实验鸽可满足鸽新城疫灭活疫苗效力评价试验的要求,且结果稳定可靠。通过该研究筛选的实验鸽,满足试验需求、提高研究结果的可靠性和重复性,并在保证鸽用疫苗质量方面具有重要意义。
文摘[ Objective] The aim of this study was to evaluate the clinical effect of the inactivated vaccine in oil emulsion against Newcastle disease and Fowl cholera, and provide conditions for combined prevention and control of Newcastle disease and Fowl cholera. [ Method] The mixture of avian pasteurella multocida （type A） virulent strain 1502 and Newcastle disease virus attenuated strain La Sota was prepared into five batches of the inactivated vaccine in oil emulsion to use in the field test for assessing its safety and effects on immune protection of chicken, duck and goose. [ Result] The field safety test showed that there was no adverse reaction in the vaccinated chickens, ducks and geese. The field test of immune effect for chickens suggested that the titers of hemagglutination inhibition antibody for Nescastle disease virus （ ND-HI ） in 7 - 14 day- old chickens and 60 -90 day-old young chickens were 2 -3 log2 higher than the control group after being vaccinated for 3 weeks, which could last for more than 4 months. The protection rate against avian pasteurella multocida was over 75.0% and its immune effect could last for 6 months. The field test of immune effect for duck and goose indicated that the titers of ND-HI antibody were all higher than 4.2 log2 in vaccinated ducks and geese while lower than 2 log2 in the control group after being vaccinated for 3 weeks. The protection rate against avian pasteurella multocida in vaccinated ducks and geese was higher than 75.0% and 62.5% respectively. [ Conclusion] The binary vaccine is safe for poultry and has good immune effects.
