The effects of Bacillus cereus strain BP‐MBRG/1b (probiotic), 0.4% fructooligosaccharides (prebiotic) and its combination synbiotic dietary supplementations were evaluated in M. rosenbergii juveniles through feeding trials. After 28 days of feeding, the results showed that the probiotic fed juveniles had the highest specific growth rate (SGR) (1.00 ± 0.02%/day) compared with the prebiotic (0.42 ± 0.08%/day) and synbiotic (0.54 ± 0.08%/day) treatments. The prawns were then challenged with pathogenic Aeromonas hydrophila strain AH‐1N via static immersion. No significant differences were observed in terms of mortalities for the first challenge nor in the second challenge for all the treatments. Histological observations of the prawn hepatopancreas in all the treatment groups demonstrated necrosis and sloughing of the cells. Overall, the present result suggested that B. cereus strain BP‐MBRG/1b demonstrated enhancement of growth performance in M. rosenbergii compared with prebiotic and synbiotic treatments. However, further investigation is required to study the optimal dosage of the synbiotic treatment (probiotic B. cereus strain BP‐MBRG/1b and prebiotic fructooligosaccharides) against A. hydrophila challenged M. rosenbergii.

中文翻译：

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蜡状芽孢杆菌菌株BP‐MBRG / 1b和益生元低聚果糖日粮对罗氏沼虾（De Mann）对嗜水气单胞菌AH-1N生长性能和抗病性的影响

的效果蜡状芽孢杆菌菌株BP-MBRG / 1B（益生菌），0.4％低聚果糖（益生素）和其组合的合生素的膳食补剂中进行了评价罗氏沼虾通过饲养试验幼鱼。喂食28天后，结果显示，与益生菌（0.42±0.08％/天）和合生素（0.54±0.08％）相比，益生菌喂食的幼虫的最高比生长率（SGR）（1.00±0.02％/天） /天）治疗。然后用致病性嗜水气单胞菌攻击虾通过静态浸没获得AH-1N菌株。对于所有治疗，在第一次挑战或第二次挑战的死亡率方面均未观察到显着差异。在所有处理组中对虾肝胰脏的组织学观察表明细胞坏死和脱落。总体而言，本结果表明蜡状芽孢杆菌菌株BP‐MBRG / 1b与罗氏沼虾的益生元和合生元处理相比，表现出增强的生长性能。但是，需要进一步研究以研究针对亲水性链球菌攻击的M.的合生素治疗的最佳剂量（益生菌蜡状芽孢杆菌BP-MBRG / 1b和益生元低聚果糖）。 罗森贝格（Rosenbergii）。