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Effect of difference doses of newcastle disease vaccine immunization on growth performance,plasma variables and immune response of broilers

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Journal of Animal Science and Biotechnology 2015年第3期6卷 317-321页

作者： Xiaofei Wang Qinqin Zhou Jing Shen Junhu Yao Xiaojun Yang Author details College of Animal Science and Technology Northwest A&F University College of Science Nanjing Agricultural University

Background： As a member of the Paromyxoviridoe group, newcastle disease virus （NDV） is the key causative agent of newcastle disease （ND） that attacks chickens, turkeys and other avian birds. Surviving birds showed lower feed utilization, growth performance or egg production, which results in severe economic losses. The purpose of this study was to determine the effect of different doses of NDV immunization on growth performance, plasma variables and immune response of broiler chickens. Methods： A total of 480 one-day-old Arbor Acres broilers were randomly administrated with 0, 4, 6 or 8 doses of NDV at 12 d and 28 d, respectively. Each group consisted of ten replicates with 12 birds each. Growth performance and organ weight were recorded. Plasma concentration of glucose, total protein, cholesterol, triglycerides and nonesterified fatty acid was determined using commercial kits. The concentration of plasma corticosterone and insulin was measured using commercially available radio immune assay kits. Serum antibody titer and peripheral blood lymphocyte proliferation were also recorded. Results： The results showed that NDV decreased body weight gain （BWG）, and increased Feed：Gain ratio at 1-2 ] d at all doses （P 〈 0.05）. Plasma insulin concentration was lower in all immunization groups after the first immunization at 12 d （P 〈 0.01）. The rest of the plasma indexes were not affected by NDV immunization, including glucose, total protein, cholesterol, triglycerides, nonesterified fatty acid, heterophil/lymphocyte ratio, as well as the proliferation of peripheral blood lymphocyte （P 〉 0.05）. Compared with the control group, NDVtreatment elevated NDV antibody titer at 10 d after the first inoculation （P 〈 0.05）, and at d 5, 9 and 13 after the second inoculation （P 〈 0.05）. Repeated NDV inoculation had no deleterious impacts on body composition at 42 d, and nutrient accretion rates at 8-42 d （P 〉 0.05）. Conclusions： In conclusion, NDV challenge decreased BWG and feed efficien

关键词： Broiler Immune response Metabolism newcastle disease vaccine

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Effects of Three Kinds of Chinese Medicine Polysaccharides on the Immune Effect of newcastle disease vaccine

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Agricultural Science & Technology 2015年第10期16卷 2283-2285,2303页

作者：杨庆芳杨康林姚静蒋春茂晋中职业技术学院山西晋中030600 西藏职业技术学院西藏拉萨850000 无锡市生物农业科技服务推广总站江苏无锡214000 江苏农牧科技职业学院江苏泰州225300

240 14-day-old healthy and non-immune Roman chicken were randomly divided into 8 groups, including blank control group （BC group）, immune control group （IC group）, and immunity groups of each Chinese medicine. On the day of the first immunity, 3 d before the second immunity, the day of the second immunity and 3 d after the second immunity, high-dose concentration and low-dose concen- tration of Astragalus polysaccharide （ASP）, Epimedium polysaccharide （EPP） and Isatis roots polysaccharide （IRPS） were used for the immunity groups of each Chi- nese medicine using the gavage, and 0.5 ml for each chick, and the equivalent normal saline was used for the blank control group and vaccine control group. On the 7^th, 14^th, 21^st and 28^th day after the first immunity, 10 chicken of each group were randomly got and weighed, and the antibody titer and the changes of the pro- liferation of T lymphocyte were measured. The results showed that 3 kinds of Chi- nese medicine polysaccharides all can increase the weight of chicken, improve HI antibody titer of newcastle disease, and promote the proliferation of peripheral T lymphocyte, in which the effect of IRPS at low dosage is the best.

关键词： Astragalus polysaccharides (ASP) Epimedium polysaccharides (EPP) Isatis root polysaccharides (IRPS) newcastle disease vaccine Antibody titer T lymphocyte

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