Bacterial Diversity Commensal Bacteria Bacterial Strains Bacteria Metabolites Metabolism Bacterial Groups Social Interactions Bacterial Imbalance Fecal Microbiota Transplantation E. coli Bacteroidales Order Medications Immune Tolerance Bacterial Sensing Genetic Engineering Harmful Bacteria Microbial Interactions Microbial Species Metagenomics Dysbiosis Bifidobacterium Commensal Microbes Dietary Impact Microbiome Disruption Cancer Promotion Short-Chain Fatty Acids Immune Response Infant Gut Health Dietary Influence Bacterial Fermentation Diversity-Generating Retroelements Antibiotic Discovery Bacterial Species Gut-Brain Axis Bacterial Infections Gene Interaction