Department of Animal Breeding and Nutrition, Faculty of Animal Breeding and Biology, Bydgoszcz University of Science and Technology, Bydgoszcz 85-084, Poland.
Department of Animal Breeding and Nutrition, Faculty of Animal Breeding and Biology, Bydgoszcz University of Science and Technology, Bydgoszcz 85-084, Poland.
Poult Sci. 2023 Jun;102(6):102668. doi: 10.1016/j.psj.2023.102668. Epub 2023 Mar 21.
The purpose of the present study was to compare the effects of two commercial vaccination programs using Prevexxion or Vaxxitek vaccines on production parameters, carcass weight and composition, and selected anatomical characteristics of Ross 308 broiler chickens. During the rearing period of broiler chickens, body weights were determined at 1, 10, 35, and 42 d of age, and feed intake and mortality of birds were recorded each day. On d 42 of the rearing period, 20 chickens were selected for dissection, 10 birds from each group. After slaughtering, the weight of the eviscerated carcass and the proportion of carcass elements, the lengths and diameters of individual intestinal segments, the weight of selected internal organs, and the dimensions of the femur and tibia were determined. The Prevexxion vaccination program had a positive significant effect on eviscerated carcass yield, dressing percentage, breast meat, wing and carcass remains content, as well as duodenum length, proventriculus content of slaughter weight and smallest breadth of the corpus of tibia bone. Broiler chickens treated with Prevexxion vaccines had higher European Production Index. The results indicate that Prevexxion vaccines have a more favorable effect on the production performance and slaughter characteristics of Ross 308 broiler chickens than with the use of Vaxxitek vaccines.
本研究的目的是比较使用 Prevexxion 或 Vaxxitek 疫苗的两种商业疫苗接种方案对罗斯 308 肉鸡生产性能、屠体重量和组成以及选择的解剖特征的影响。在肉鸡饲养期间，在 1、10、35 和 42 日龄时测定体重，并每天记录饲料摄入量和死亡率。在饲养期的第 42 天，从每组中选择 20 只鸡进行解剖。屠宰后，测定去内脏屠体的重量以及屠体成分的比例、各个肠段的长度和直径、选定内脏器官的重量以及股骨和胫骨的尺寸。Prevexxion 疫苗接种方案对去内脏屠体产量、出肉率、胸肉、翅膀和屠体残余物含量以及十二指肠长度、腺胃重量和胫骨骨体的最小宽度有积极显著的影响。用 Prevexxion 疫苗处理的肉鸡的欧洲生产指数更高。结果表明，Prevexxion 疫苗对罗斯 308 肉鸡的生产性能和屠宰特性的影响优于使用 Vaxxitek 疫苗。
