Hernández-Granados María José, Ortiz-Basurto Rosa Isela, Jiménez-Fernández Maribel, García-Munguía Carlos Alberto, Franco-Robles Elena
Interinstitutional Master's degree in Livestock Production, Division of Life Sciences, Campus Irapuato-Salamanca, University of Guanajuato, Irapuato, Guanajuato 36500, Mexico.
Integral Food Research Laboratory, TecNMInstitute Technological of Tepic, 2595 Technological Av., Tepic, Nayarit, 63175, México.
Anim Biosci. 2022 Apr;35(4):587-595. doi: 10.5713/ab.21.0213. Epub 2021 Aug 25.
The present study was conducted to evaluate the effects of dietary supplementation with Bifidobacterium animalis, Agave fructans, and symbiotic of both encapsulated on growth performance, feed efficiency, blood parameters, and immune status in broiler chickens, and to compare these with diets including antibiotic growth promoters and without additives.
A comparative experimental study was carried out with 135 male Ross 308 broiler chickens. Each trial was divided into 5 equal groups. Control group (CON) received a standard diet without growth promoter; GPA, a standard diet with colistin sulfate and zinc bacitracin (0.25 g/kg of feed); PRE, a standard diet with 1% Agave fructans; PRO, a standard diet with Bifidobacterium animalis (11.14±0.70 log CFU/g); SYM, a standard diet with B. animalis and Agave fructans.
A significant decrease in food consumption was found for the GPA, PRE, and SYM, compared to the CON group. The results show a better feed conversion index in PRE and GPA with respect to the CON group with the highest conversion index. Interestingly, the weight of the gastrointestinal tract shows a statistically significant difference between GPA and PRE groups. Moreover, the length of the gastrointestinal tract of the GPA group was less than the PRE group. In the total leukocyte count, there was a statistically significant increase in the GPA group compared to the CON, PRE, and PRO groups, and the heterophiles-lymphocytes index was lower in PRO. Regarding the cytokines, interleukin 10 (IL-10) decreased in PRO compared to CON and PRE, while IL-1β increased in the SYM group.
Alternative treatments were shown to achieve similar productive results as growth-promoting antibiotics and showed improvement over diet without additives; however, they have immunomodulatory properties and improved the development of the gastrointestinal tract compared to the treatment of growth-promoting antibiotics.
本研究旨在评估日粮中添加动物双歧杆菌、龙舌兰果聚糖以及二者的包囊共生体对肉鸡生长性能、饲料效率、血液参数和免疫状态的影响，并将其与含抗生素生长促进剂和无添加剂的日粮进行比较。
对135只雄性罗斯308肉鸡进行了一项对比实验研究。每个试验分为5个相等的组。对照组（CON）接受不含生长促进剂的标准日粮；GPA组，接受含硫酸黏菌素和杆菌肽锌（0.25 g/kg饲料）的标准日粮；PRE组，接受含1%龙舌兰果聚糖的标准日粮；PRO组，接受含动物双歧杆菌（11.14±0.70 log CFU/g）的标准日粮；SYM组，接受含动物双歧杆菌和龙舌兰果聚糖的标准日粮。
与CON组相比，GPA组、PRE组和SYM组的采食量显著降低。结果显示，PRE组和GPA组的饲料转化率指数优于CON组，CON组的转化率指数最高。有趣的是，GPA组和PRE组之间胃肠道重量存在统计学显著差异。此外，GPA组的胃肠道长度小于PRE组。在总白细胞计数方面，与CON组、PRE组和PRO组相比，GPA组有统计学显著增加，PRO组的嗜异性粒细胞-淋巴细胞指数较低。关于细胞因子，与CON组和PRE组相比，PRO组的白细胞介素10（IL-10）降低，而SYM组的IL-1β增加。
替代处理方法显示出与促生长抗生素相似的生产效果，并且比无添加剂日粮有所改善；然而，与促生长抗生素处理相比，它们具有免疫调节特性并改善了胃肠道的发育。
