主题词：Gut microbiota and health; Clostridium difficile and Clostridium perfringens research; Probiotics and Fermented Foods; Diet and metabolism studies; Gastrointestinal motility and disorders; Helicobacter pylori-related gastroenterology studies; Infant Nutrition and Health; Viral gastroenteritis research and epidemiology; Escherichia coli research studies; Tryptophan and brain disorders; Liver Disease Diagnosis and Treatment; Inflammatory Bowel Disease; Dietary Effects on Health; Vibrio bacteria research studies; Microscopic Colitis; Antibiotic Resistance in Bacteria; Digestive system and related health; Bacteriophages and microbial interactions; Microbial Metabolites in Food Biotechnology; Metabolomics and Mass Spectrometry Studies; Epigenetics and DNA Methylation; Drug Transport and Resistance Mechanisms; Immune Response and Inflammation; Nutritional Studies and Diet; Salmonella and Campylobacter epidemiology