Probiotics, an eco-friendly alternative to antibiotics application appears to have strong potential for improving the sustainability of aquaculture. The aim of the study was to evaluate the effect of probiotic brewer’s yeast, Saccharomyces cerevisiae supplementation on growth performance, feed utilization and intestinal morphometry of Nile tilapia, Oreochromis niloticus. A feeding trial of 60 days was conducted in which tilapia fingerlings (7.55 ± 1.25 g) were randomly distributed into three replicate aquaria under four different treatment groups, receiving S. cerevisiae at 0, 1, 2 and 4 g kg⁻¹ diet, respectively. At the end of the feeding trial, growth performance parameters (weight gain, WG; % WG; specific growth rate, SGR), feed utilization indices (protein efficiency ratio, PER; feed conversion ratio, FCR) and intestinal morphology were assessed. The results obtained from this study revealed that growth performance and feed utilization indices were increased significantly in the fish fed with 4 g kg⁻¹ S. cerevisiae supplemented diet compared to controls. The length, width and area of villus were significantly enlarged in fish fed 4 g kg⁻¹ S. cerevisiae supplemented diet. Likewise, intestinal mucosal fold, width of lamina propria, width of enterocytes and number of goblet cells increased in the fish fed with 4 g kg⁻¹ S. cerevisiae supplemented diet. These results demonstrated that S. cerevisiae can be effectively recommended as an important growth promoter for tilapia culture.

益生菌是抗生素应用的一种环保替代品，似乎具有提高水产养殖可持续性的巨大潜力。该研究的目的是评估益生菌啤酒酵母、酿酒酵母补充剂对尼罗罗非鱼、Oreochromis niloticus生长性能、饲料利用和肠道形态测定的影响。进行了 60 天的饲养试验，其中将罗非鱼鱼种 (7.55 ± 1.25 g) 随机分配到四个不同处理组的三个重复水族箱中，接受S。0、1、2 和 4 g kg ^{−1 的}酿酒酵母饮食，分别。在饲喂试验结束时，评估生长性能参数（增重，WG；% WG；比生长率，SGR）、饲料利用指数（蛋白质效率比，PER；饲料转化率，FCR）和肠道形态。从这项研究中获得的结果表明，饲喂 4 g kg ^-1 S的鱼的生长性能和饲料利用指数显着提高。与对照组相比，添加了酿酒酵母的饮食。在喂食4 g kg ^-1 S 的鱼中，绒毛的长度、宽度和面积显着增大。酿酒酵母补充饮食。同样，饲喂4 g kg ^-1 S的鱼的肠粘膜皱襞、固有层宽度、肠上皮细胞宽度和杯状细胞数量增加。酿酒酵母补充饮食。这些结果表明S . 酿酒酵母可以有效地被推荐为罗非鱼养殖的重要生长促进剂。