Department of Biopathologic Science and Hygiene of Food and Animal Production, Faculty of Veterinary Medicine, 06126 Perugia, Italy.
Poult Sci. 2011 Jul;90(7):1462-6. doi: 10.3382/ps.2010-01068.
The aim of this study was to determine serological values of lysozyme, hemolytic complement levels (alternative pathway), and bactericidal activity of serum in turkeys kept in different rearing systems (industrial, backyard, and experimental). Results showed that the values for serum bactericidal activity and hemolytic complement levels increased with age, and their values were higher in experimental and in industrial turkeys than in turkeys reared in backyard. Lysozyme concentration showed a similar pattern; its value was higher in the industrial and experimental groups than in the backyard group. Data obtained suggest that rearing system can have an influence on the natural immune parameters considered; experimental and industrial groups showed a similar trend, differentiated from that observed in the backyard group. In the backyard group, the values observed may suggest that hybrid turkeys, selected for high production, have difficulty with being reared outside where predators (foxes and weasels) and weather conditions could be responsible for a stress situation.
本研究旨在确定不同饲养系统（工业、后院和实验）下饲养的火鸡的血清溶菌酶、溶血补体水平（替代途径）和血清杀菌活性的血清学值。结果表明，血清杀菌活性和溶血补体水平的值随年龄增长而增加，且在实验和工业火鸡中的值高于后院火鸡。溶菌酶浓度也呈现出类似的模式；工业组和实验组的值高于后院组。所得数据表明，饲养系统可能对所考虑的天然免疫参数有影响；实验组和工业组表现出相似的趋势，与后院组观察到的趋势不同。在后院组中，观察到的值可能表明，为了高产量而选择的杂交火鸡在户外饲养时可能会遇到困难，因为捕食者（狐狸和黄鼠狼）和天气条件可能会导致应激状态。
