Microbiota and Clinical Diseases: Translational Insights Across Specialties offers a comprehensive examination of the role of the human microbiota in the pathogenesis, diagnosis, and management of a broad spectrum of clinical diseases. This edited volume emphasizes translational science, bridging experimental discoveries with clinical applications across multiple medical specialties. The book presents integrative perspectives on microbiota–host interactions in infectious, inflammatory, metabolic, immune-mediated, and degenerative disorders. Chapters explore molecular and cellular mechanisms, immune and metabolic signaling pathways, microbiota-derived mediators, and host susceptibility factors that influence disease onset and progression. Particular attention is given to translational models, biomarker discovery, and microbiota-targeted interventions, including dietary modulation, probiotics, postbiotics, and emerging therapeutic strategies. Designed for clinicians, translational researchers, and advanced graduate students, this volume serves as both a scientific reference and a practical guide to applying microbiota research in clinical contexts. By synthesizing insights across medical disciplines, Microbiota and Clinical Diseases: Translational Insights Across Specialties highlights the microbiota’s central role in contemporary medicine and its growing relevance to personalized and precision-based therapeutic approaches.