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Antioxidants and immune responses, resistance to Aspergilus flavus infection, and growth performance of Nile tilapia, Oreochromis niloticus, fed diets supplemented with yeast, Saccharomyces serevisiae
Animal Feed Science and Technology ( IF 3.2 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.anifeedsci.2020.114484
Mohsen Abdel-Tawwab , Ibrahim Adeshina , Zeenat A. Issa

Abstract Yeast, Saccharomyces cerevisiae, is a single cell fungus, which contains various immune-stimulant compounds such as β-glucans, nucleic acids, oligosaccharides and chitin among others. So, it has been used as a probiotic in aqua-feeds. A feeding trial was conducted to examine the effects of dietary yeast supplementation on growth, hematological, antioxidant, and immune biomarkers of Nile tilapia, Oreochromis niloticus as well as its resistance to pathogenic fungus Aspergilus flavus infection. Five isonitrogenous diets containing 0 (control), 2, 4, 6, and 10 g yeast/kg diet were formulated and fed to triplicate groups of fish (2.4 ± 0.14 g) for 8 weeks. After that, fish were intraperitoneally injected with pathogenic fungus, A. flavus and observed for any clinical signs and mortality for 14 days. It is noticed that dietary yeast levels linearly and quadratically enhanced (P 0.05) their intestinal villi length/width and absorption area. Linearly and quadrically increases were observed in counts of red blood cells, white blood cells, and platelets as well as hemoglobin and hematocrit values accompanied with linear and quadric decreases in heterocytes and monocytes percentages due to dietary yeast administration to Nile tilapia. Further linear and quadric (P

中文翻译:

抗氧化剂和免疫反应、对黄曲霉感染的抵抗力以及尼罗罗非鱼、尼罗罗非鱼、添加酵母、酿酒酵母的饲料的生长性能

摘要 酵母(Saccharomyces cerevisiae)是一种单细胞真菌,含有多种免疫刺激化合物,如β-葡聚糖、核酸、寡糖和几丁质等。因此,它已被用作水产饲料中的益生菌。进行了一项饲养试验,以检查膳食酵母补充剂对尼罗罗非鱼、尼罗罗非鱼的生长、血液学、抗氧化和免疫生物标志物的影响,以及其对病原真菌黄曲霉感染的抵抗力。配制含有 0(对照)、2、4、6 和 10 g 酵母/kg 饮食的五种等氮饮食,并将其喂给三组鱼(2.4 ± 0.14 g)8 周。之后,鱼腹腔注射致病真菌黄曲霉,并观察任何临床症状和死亡率 14 天。值得注意的是,日粮酵母水平线性和二次增加(P 0.05)它们的肠绒毛长度/宽度和吸收面积。观察到红细胞、白细胞和血小板的计数以及血红蛋白和血细胞比容值呈线性和二次增加,同时由于向尼罗罗非鱼添加饲料酵母,杂细胞和单核细胞百分比呈线性和二次减少。进一步线性和二次曲线 (P
更新日期:2020-05-01
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