De Herdt P, Ducatelle A R, Uyttebroek A E, Sneep A, Torbeyns R
Laboratory of Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
Avian Dis. 2001 Jul-Sep;45(3):612-9.
In this study, a follow-up was made between 1993 and 1997 from broiler breeders at birth down to offspring broilers at processing, through vertically integrated registration of infectious bronchitis virus (IBV) antibody titers and performance data. All measurements were used two by two in a simple correlation study to calculate the degree to which they were linearly correlated. The antibody patterns in the broiler breeders indicated frequent field infections breaking through vaccinal immunity. Significant correlations measured between antibody titers and production parameters within and between the generations strongly suggested negative effects of IBV infections on laying percentage in the breeders and on mortality and daily weight gain in the broilers. Economic losses associated with IBV infections in the broilers occurred predominantly in flocks hatched with low and erratic maternal antibody titers. We concluded that IBV vaccination strategies should aim at high and uniform antibody titers in the broiler breeders.
在本研究中，通过对传染性支气管炎病毒（IBV）抗体效价和生产性能数据进行垂直整合记录，从1993年至1997年对肉种鸡从出生到加工后的子代肉鸡进行了跟踪研究。在一项简单的相关性研究中，将所有测量数据两两结合使用，以计算它们之间的线性相关程度。肉种鸡的抗体模式表明，经常发生突破疫苗免疫的野外感染。在代内和代间抗体效价与生产参数之间测得的显著相关性强烈表明，IBV感染对种鸡的产蛋率以及肉鸡的死亡率和日增重有负面影响。与肉鸡IBV感染相关的经济损失主要发生在母源抗体效价低且不稳定的孵化鸡群中。我们得出结论，IBV疫苗接种策略应旨在使肉种鸡获得高且均匀的抗体效价。
