Changes in the Gut Microbiota Composition of Juvenile Olive Flounder (Paralichthys olivaceus) Caused by Pathogenic Bacterial Infection

The fish gut microbiota plays an important role in overall health. However, few reports have described the changes composition of following infection with pathogenic bacteria olive flounder (Paralichthys olivaceus). Here, we reported after treatment each three (Edwardsiella tarda, Streptococcus iniae, and Vibrio harveyi). Edwardsiella tarda decreased relative abundance Verrucomicrobia increased Proteobacteria at phylum level over time. Similarly, iniae reduced Verrucomicrobia. harveyi caused a decrease Firmicutes Proteobacteria. At genus level, all pathogens Ralstonia Sphingomonas species. Conversely, this abundances Rubritalea, Saccharimonas, Bacillus Therefore, reducing increasing might help maintain healthy balance. This research be useful for future studies on improving health through regulation.