文献类型： 外文期刊

作者： Zhang, Hongyu ¹ ; Wang, Haibo ² ; Hu, Kun ¹ ; Jiao, Liting ² ; Zhao, Mingjun ² ; Yang, Xianle ¹ ; Xia, Lei ² ;

作者机构： 1.Shanghai Ocean Univ, Natl Pathogen Collect Ctr Aquat Anim, Shanghai 210306, Peoples R China

2.Chinese Acad Fishery Sci, Beijing 100141, Peoples R China

3.Shanghai Ocean Univ, Natl Demonstrat Ctr Expt Fisheries Sci Educ, Shanghai 210306, Peoples R China

4.Minist Agr, Key Lab Freshwater Aquat Genet Resources, Shanghai 210306, Peoples R China

5.Beijing Seasun Aquaculture BIO TECH Co LTD, Beijing 102488, Peoples R China

关键词： Channel catfish; L; casei; L; plantarum; growth; disease resistance; intestinal microbiota

期刊名称：ANIMALS （ 影响因子：2.752； 五年影响因子：2.942 ）

ISSN： 2076-2615

年卷期： 2019 年 9 卷 12 期

页码：

收录情况： SCI

摘要： Simple Summary Channel catfish became one of the most efficient aquaculture species due to its fast growth and considerable commercial importance, however, the intensive farming of these fish resulted in disease pressure and the eutrophic conditions. In this study, we isolated two strains of lactobacillus, Lactobacilluscasei YYL3 and L. plantarum YYL5, which can be potentially used as feed additives to promote the growth performance, disease resistance against Edwardsiellaictaluri, and dramatically change the composition of intestinal microbiota of channel catfish. Abstract The purpose of this study is to investigate the effect of probiotics L. casei YYL3 (Lc) and L. plantarum YYL5 (Lp) on growth performance, innate immunity, disease resistance and intestinal microbiota of channel catfish. A total of 252 catfish (67.20 +/- 1.46 g) were randomly divided into 3 groups which were fed with basal diet, Lc-added (3.0 x 10(8) cfu/g) or Lp-added (3.0 x 10(8) cfu/g) diets, respectively. After 4 weeks of feeding, Lc significantly enhanced the growth and feed utilization of channel catfish compared with the control group (CG). Following that, the catfish were challenged with an intraperitoneal injection of 200 mu L of the pathogenic E.ictaluri (2.0 x 10(6) cfu/mL), the relative percent survival of Lc and Lp were 38.28% and 12.76%, respectively. High-throughput sequencing indicated Lc and Lp reduced the alpha diversity of the intestinal microbiota in channel catfish. Lactobacillus were overwhelming in the guts during probiotics treatment, but almost vanished away after 2 weeks post-cessation of probiotics administration. Compared to CG, Lc and Lp resulted in an increased abundance of Pseudomonas and decreased amount of Aeromonas. Functional analysis revealed that Lc treatment upregulated the relative abundance of Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways including lipid metabolism, metabolism of other amino acids, metabolism of terpenoids and polyketides, xenobiotics biodegradation and metabolism, and nucleotide metabolism. Combined, our data revealed that Lc, as a feed additive at 3.0 x 10(8) cfu/g, could promote the growth performance, disease resistance and dramatically change the composition of intestinal microbiota of channel catfish.