Biology, Pathogens and Mechanisms of Disease

Biology, Pathogens and Mechanisms of Disease provides a rigorous introduction to the biological foundations of disease within a population health framework. Moving across molecular, cellular, tissue, organismal, and population levels, the volume examines how biological mechanisms shape susceptibility, pathogenesis, clinical expression, and response to intervention.The book integrates core concepts from microbiology, immunology, pathophysiology, toxicology, antimicrobial resistance, pathogen genomics, pharmacology, pharmacogenomics, and systems biology. Particular attention is given to host-pathogen interactions, biological variability, inflammation, tissue injury and repair, evolutionary dynamics, and the translation of mechanistic evidence into prevention and health decision-making.Throughout, biological plausibility is carefully distinguished from clinical and population-level evidence. Figures, conceptual models, and analytical examples are used to clarify causal pathways while preserving uncertainty, context, and the limits of inference.Designed for students, researchers, and professionals in population health and related disciplines, the volume offers a structured foundation for interpreting biological evidence without reducing complex disease processes to single mechanisms.