Boehringer-Ingelheim, Warsaw, Poland.
Department of Animal Breeding and Nutrition, Faculty of Animal Breeding and Biology, Bydgoszcz University of Science and Technology, Bydgoszcz, Poland.
Poult Sci. 2023 Oct;102(10):102918. doi: 10.1016/j.psj.2023.102918. Epub 2023 Jul 5.
The aim of this study was to compare the effect of 2 different vaccination programs using vaccines against infection bronchitis virus (IBV) and avian metapneumovirus (aMPV) on the humoral immune response, production performance, carcass weight and composition, and the percentage of selected internal organs. During the rearing of broiler chickens, blood was collected for serum samples from randomly selected birds from each experimental group on d 1, 21, 28, and 38. Geometric mean titer (GMT) values were determined for the aforementioned diseases using serological ELISA tests, performed during routine veterinary inspections. During rearing, body weight, mortality, and feed consumption were monitored, allowing the calculation of feed consumption per kilogram of body weight gain (FCR) and the European Production Index (EPI). At the end of rearing, 20 chickens were selected for dissection, 10 birds from each group. After slaughter, the weight of the eviscerated carcass was determined, and the percentages of carcass parts and selected internal organs in the body weight were calculated. The vaccination program exerted a significant (P<0.05) effect on body weight on days 14, 21, 28, 35 and 42, the percentage of wings in the carcass and the proportion (%) of heart, liver and spleen in body weight. ELISA showed no significant effect of the vaccination program on the anti-IBV serological response, and no negative effect of covaccination against both diseases on the anti-aMPV serological response.
本研究的目的是比较两种不同的疫苗接种方案对感染性支气管炎病毒（IBV）和禽偏肺病毒（aMPV）的体液免疫反应、生产性能、胴体重量和组成以及选定内脏器官比例的影响。在肉鸡饲养期间，从每个实验组中随机选择的鸟类采血，用于在第 1、21、28 和 38 天采集血清样本。使用血清学 ELISA 试验对上述疾病进行了几何平均滴度（GMT）值测定，该试验在常规兽医检查期间进行。在饲养过程中，监测体重、死亡率和饲料消耗，允许计算每公斤体重增加的饲料消耗（FCR）和欧洲生产指数（EPI）。在饲养结束时，选择 20 只鸡进行解剖，每组 10 只鸡。屠宰后，确定去内脏胴体的重量，并计算胴体各部分和选定内脏器官在体重中的百分比。疫苗接种方案对 14、21、28、35 和 42 天的体重、翅膀在胴体中的百分比以及心脏、肝脏和脾脏在体重中的比例有显著（P<0.05）的影响。ELISA 显示疫苗接种方案对抗 IBV 血清学反应没有显著影响，两种疾病的共同疫苗接种对抗 aMPV 血清学反应也没有负面影响。
