Maintaining the balance of intestinal microbiota is vital for the growth and health of crustaceans. The current study explored the influences of the surface layer proteins (SLPs) of Pediococcus pentosaceus on the growth performance, disease resistance, and gut microbial community of the freshwater prawn Macrobrachium rosenbergii. After 28 days of feeding, obvious enhancements in the growth performance were found in the PF (a commercial basic diet + intact P. pentosaceus) group compared to the CF (a commercial basic diet, control) and RF (a commercial basic diet + LiCl-treated P. pentosaceus) groups. Meanwhile, the relative percent survival (RPS) of the PF group was found to be 82.1%, higher than the RF group (RPS = 63.2%) in the challenge test. There were noteworthy differences in the relative richness of Aeromonas among different treatments, and the PF group was the lowest. Whereas the relative abundance of Lactococcus between the CF and RF group did not markedly differences, which was obviously lower than the PF group. The prediction of bacterial phenotype indicated that the pathogenic potential of intestinal microbiota was decreased by increasing dietary SLPs-carrying P. pentosaceus. The results suggested that SLPs-carrying P. pentosaceus can improve growth, modulate intestinal microbiota, and increase the resistance of prawns against Aeromonas hydrophila infection.

维持肠道菌群的平衡对于甲壳动物的生长和健康至关重要。目前的研究探索了戊糖小球菌的表面层蛋白（SLP）对淡水虾罗氏沼虾的生长性能，抗病性和肠道微生物群落的影响。喂食28天后，与CF（商业基本饮食，对照组）和RF（商业基本饮食+ LiCl）相比，PF（商业基本饮食+完整的戊糖对虾）组的生长性能有了明显提高。治疗过的P，戊糖）组。同时，在挑战测试中，PF组的相对生存百分比（RPS）为82.1％，高于RF组（RPS = 63.2％）。在不同处理之间，气单胞菌的相对丰富度存在显着差异，PF组最低。而的相对丰度的乳酸乳CF和RF组之间没有显着不差异，这是明显优于PF组降低。细菌表型的预测表明，通过增加饮食中携带SLP的P可以降低肠道菌群的致病潜力。戊s科。结果表明，学生学习概览携带P。戊s科可以改善生长，调节肠道菌群，并提高虾对嗜水气单胞菌感染的抵抗力。