[ Objective ] The paper was to prevent the occurrence of broiler avian influenza virus HS subtype Re-8 strain effectively in the breeding process of broilers. [Method] The maternal antibodies of broilers in Beijing Ba...[ Objective ] The paper was to prevent the occurrence of broiler avian influenza virus HS subtype Re-8 strain effectively in the breeding process of broilers. [Method] The maternal antibodies of broilers in Beijing Baochen Hongwang farm were monitored. According to the disappearance law of maternal antibody, the optimal immune time of broiler avian influenza virus H5 subtype Re-8 strain was determined. [ Result] The maternal antibody level of 2-day-old broilers was relatively high, concentrated at 6 log2 -9 log2, and the antibody positive rate was 100%. The maternal antibody level of 8-day-old broilers concentrated at 4 log2 -6 log2, and the antibody positive rate was 100%. The maternal antibody level of 17-day-old broilers concentrated at 0 log2 -3 log2 , and the antibody positive rate was 0. The average maternal antibody level of 24 - 37 days old broilers was 〈 1 log2, and the antibody positive rate was 0. [ Conclusion ] Although the av- erage maternal antibody level of 8-day-old broilers was higher than 5 log2 , 20% of chickens was 4 log2, and maternal antibody could not protect the flock completely. Therefore, the best primary immunization day age of chicks against avian influenza virus was 8 - 10 days of age.展开更多
为了解重组禽流感病毒H5亚型二价灭活疫苗(H5N1,Re-6株+Re-8株)的免疫效果,为临床上制定合理的禽流感疫苗免疫程序提供依据,试验选取14日龄樱桃谷商品肉鸭30只和SPF鸭30只,注射重组禽流感病毒H5亚型二价灭活疫苗(Re-6株+Re-8株)0.4 m L...为了解重组禽流感病毒H5亚型二价灭活疫苗(H5N1,Re-6株+Re-8株)的免疫效果,为临床上制定合理的禽流感疫苗免疫程序提供依据,试验选取14日龄樱桃谷商品肉鸭30只和SPF鸭30只,注射重组禽流感病毒H5亚型二价灭活疫苗(Re-6株+Re-8株)0.4 m L/只作为首次免疫,饲养至28日龄时,樱桃谷肉鸭、SPF鸭随机分成A、B和C、D组,每组均为15只,B、D组再次颈部皮下注射该疫苗0.5 m L/只,均从14日龄起每周采集血清一次,直至56日龄,检测H5抗体情况。结果表明:不同品种鸭对同一亚型禽流感疫苗免疫效果存在差异,首次免疫的日龄可以提至7~10日龄,商品肉鸭一次免疫即可满足防疫需要。展开更多
文摘[ Objective ] The paper was to prevent the occurrence of broiler avian influenza virus HS subtype Re-8 strain effectively in the breeding process of broilers. [Method] The maternal antibodies of broilers in Beijing Baochen Hongwang farm were monitored. According to the disappearance law of maternal antibody, the optimal immune time of broiler avian influenza virus H5 subtype Re-8 strain was determined. [ Result] The maternal antibody level of 2-day-old broilers was relatively high, concentrated at 6 log2 -9 log2, and the antibody positive rate was 100%. The maternal antibody level of 8-day-old broilers concentrated at 4 log2 -6 log2, and the antibody positive rate was 100%. The maternal antibody level of 17-day-old broilers concentrated at 0 log2 -3 log2 , and the antibody positive rate was 0. The average maternal antibody level of 24 - 37 days old broilers was 〈 1 log2, and the antibody positive rate was 0. [ Conclusion ] Although the av- erage maternal antibody level of 8-day-old broilers was higher than 5 log2 , 20% of chickens was 4 log2, and maternal antibody could not protect the flock completely. Therefore, the best primary immunization day age of chicks against avian influenza virus was 8 - 10 days of age.
文摘为了解重组禽流感病毒H5亚型二价灭活疫苗(H5N1,Re-6株+Re-8株)的免疫效果,为临床上制定合理的禽流感疫苗免疫程序提供依据,试验选取14日龄樱桃谷商品肉鸭30只和SPF鸭30只,注射重组禽流感病毒H5亚型二价灭活疫苗(Re-6株+Re-8株)0.4 m L/只作为首次免疫,饲养至28日龄时,樱桃谷肉鸭、SPF鸭随机分成A、B和C、D组,每组均为15只,B、D组再次颈部皮下注射该疫苗0.5 m L/只,均从14日龄起每周采集血清一次,直至56日龄,检测H5抗体情况。结果表明:不同品种鸭对同一亚型禽流感疫苗免疫效果存在差异,首次免疫的日龄可以提至7~10日龄,商品肉鸭一次免疫即可满足防疫需要。
