Gastrointestinal tract and neuroendocrine system responses of young turkeys to the early administration of antibiotics or feeding a diet containing a coccidiostat

Parameters of ileal and cecal digesta in turkeys at 56 d of age. Extracellular, intracellular, and total activity of bacterial a- and b-glucosidase, a- and b-galactosidase (mmol/h/g) in the cecal digesta of turkeys at 56 d of age. Extracellular, intracellular, and total activity of bacterial b-glucuronidase, a-arabinopyranosidase, and b-xylosidase (mmol/h/ g) in the cecal digesta of turkeys at 56 d of age. Concentrations and profile of short-chain fatty acids (SCFAs) in the cecal digesta of turkeys at 56 d of age. Cortisol content of the yolk sac (ng/sac) and blood in turkeys (ng/mL). Blood hormone levels in turkeys. The effect of different antibiotics on the growth performance of turkeys at 1 to 12 wk of age. The experiment was conducted on 1540 Hybrid Converter turkeys were allocated to 4 groups on the day of hatch. Each group consisted of 7 pens with 55 birds per pen. Group ENR was treated with enrofloxacin for the first 5 d of life, group DOX received doxycycline for 5 d and group MON was administered monensin for 84 d. CON birds served as a control group without any antibiotic treatment or MON administration.

56日龄火鸡回肠与盲肠食糜相关参数。
56日龄火鸡盲肠食糜中细菌α-葡萄糖苷酶（α-glucosidase）、β-葡萄糖苷酶（β-glucosidase）、α-半乳糖苷酶（α-galactosidase）与β-半乳糖苷酶（β-galactosidase）的胞外、胞内及总酶活（单位：mmol/h/g）。
56日龄火鸡盲肠食糜中细菌β-葡萄糖醛酸苷酶（β-glucuronidase）、α-阿拉伯吡喃糖苷酶（α-arabinopyranosidase）与β-木糖苷酶（β-xylosidase）的胞外、胞内及总酶活（单位：mmol/h/g）。
56日龄火鸡盲肠食糜中短链脂肪酸（short-chain fatty acids, SCFAs）的浓度与组成谱。
火鸡卵黄囊皮质醇含量（单位：ng/囊）及血液皮质醇含量（单位：ng/mL），同时包含火鸡血液激素水平数据。
不同抗生素对1~12周龄火鸡生长性能的影响。
本实验以1540只Hybrid Converter品系火鸡为研究对象，于出壳当日将其随机分为4组。每组设置7个重复饲养栏，每栏饲养55只火鸡。其中ENR组于出壳后前5天饲喂恩诺沙星（enrofloxacin），DOX组于前5天饲喂多西环素（doxycycline），MON组连续84天饲喂莫能菌素（monensin）；CON组为空白对照组，不施加任何抗生素或莫能菌素处理。