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This edited collection of 12 chapters by research workers from a wide range of disciplines resolves the confusion that currently surrounds the "hygiene hypothesis" by considering the human need for exposure to microorganisms from an evolutionary point of view. Evolution, Biodiversity and a Reassessment of the Hygiene Hypothesis explains why we evolved a requirement for exposure to microbiota from our mothers, from other people, and from the natural environment. It also explains the physiological roles of these exposures, what goes wrong when the exposures are distorted and how human lifestyles and activities, including degradation of the natural environment, are leading to this distortion. Particular attention is given to the range of pathologies associated with inappropriate microbial exposures and inappropriate colonization, including immunoregulatory problems such as allergies and autoimmunity, metabolic problems such as obesity and diabetes, and problems of central nervous system function and neurodegeneration. This book is of profound relevance to most medical disciplines, but also to those concerned with preserving the natural environment and with developing healthier urbanisation.
Graham A. W. Rook, BA MB BChir MD, is an emeritus Professor of Medical Microbiology at UCL (University College London). He was educated at the University of Cambridge and at St. Thomas’ Hospital London. He became a professor of medical microbiology at UCL in 1994. The theme of his research was initially the immunopathology of tuberculosis, but in recent years GR’s focus has been the application of a Darwinian perspective to the effects on health of diminishing exposure to microorganisms from the natural environment, and of the changing composition of our commensal microbiota. GR coined the expression “Old Friends Hypothesis” to highlight a Darwinian re-interpretation of the hygiene hypothesis in 2003. Recently, in collaboration with neuroscientists and psychiatrists, this thinking has been applied to psychiatric disorders that are accompanied by persistently raised biomarkers of inflammation and to the reduced stress resilience of people living in high-income countries. Thus GR’s approach is interdisciplinary, with an emphasis on integrative physiology.
Christopher A. Lowry, PhD is an Associate Professor in the Department of Integrative Physiology, Center for Neuroscience, and Center for Microbial Exploration at the University of Colorado Boulder, with a secondary appointment in the Department of Physical Medicine and Rehabilitation (PM&R) and Center for Neuroscience, University of Colorado Anschutz Medical Campus, a Principal Investigator in the Department of Veterans Affairs Eastern Colorado Health Care System, VA Rocky Mountain Mental Illness Research, Education, & Clinical Center (MIRECC), director of the Behavioral Neuroendocrinology Laboratory at CU Boulder, Co-Director of the Military and Veteran Microbiome Consortium for Research and Education (MVM-CoRE), Senior Fellow and member of the Board of Directors of inVIVO Planetary Health, of the Worldwide Universities Network (WUN), and a member of the Board of Directors of Trails Please Foundation. Dr Lowry’s research program focuses on understanding stress-related physiology and behaviour with an emphasis on the microbiome-gut-brain axis.
