Abstract

Antibiotic resistance is looming problem in broiler production globally and there has been an increasing interest to look for sustainable alternatives to antibiotics. Yeast and its derived products are recognized as potential feed additives because of their beneficial impacts on poultry. Particularly, yeast exhibited positive effects on the humoral immunity by increasing serum immunoglobulin (Ig) A levels. Moreover, yeast and its products showed immune adjuvant-like properties that helped the broilers chicken to develop faster and stronger innate immune response under pathogenic challenges. Use of yeast and its products as prebiotic/probiotic improves the gut architecture mainly by improving the gut development and gut microbiome, reduction in colonization of pathogens through competitive exclusion, binding of toxins and enhancing digestion and absorption of nutrients. These unique properties of yeast and yeast products enhance animal welfare and productivity; warrant them to be used as a promising feed additive. This article, therefore, provides insights into the functional role of yeast and its products in the broiler diets and highlights its importance as a commercially viable alternative of synthetic antibiotic growth promoters in the broiler feed industry.

摘要

抗生素耐药性是全球肉鸡生产中迫在眉睫的问题，人们越来越关注寻找抗生素的可持续替代品。酵母及其衍生产品因其对家禽的有益影响而被公认为潜在的饲料添加剂。特别是，酵母通过增加血清免疫球蛋白 (Ig) A 水平对体液免疫产生积极影响。此外，酵母及其产品显示出类似免疫佐剂的特性，可帮助肉鸡在病原体挑战下发展出更快、更强的先天免疫反应。使用酵母及其产品作为益生元/益生菌主要通过改善肠道发育和肠道微生物组、通过竞争排斥减少病原体定植来改善肠道结构，结合毒素，促进营养物质的消化和吸收。酵母和酵母产品的这些独特特性提高了动物福利和生产力；保证它们被用作有前途的饲料添加剂。因此，本文提供了酵母及其产物在肉鸡日粮中的功能作用的见解，并强调了其作为肉鸡饲料行业合成抗生素生长促进剂的商业可行替代品的重要性。