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This book discusses the community of microbial species (the microbiota, microbiome), which inhabits the large bowel of humans. Written from the perspective of an academic who has been familiar with the topic for 40 years, it provides a long-term perspective of knowledge about this high profile and fast-moving topic. Building on general ecological principles, the book aims to help the reader to understand how the microbiota is formed, how it works, and what the consequences are to humans. Understanding the Gut Microbiota focuses on conceptual progress made from studies of the human bowel microbiota. Where appropriate, it draws on knowledge obtained from other animal species to provide conceptual enlightenment, but this is essentially a book about humans and their bowel microbes. Particular research approaches are recommended to fill knowledge gaps so that fundamental ecological theory and information about the microbiota can be translated into benefits for human health. The relationship between food for humans and resulting food for bowel bacteria emerges as an important topic for consideration. This concise scholarly treatise of the microbiota of the human bowel will be of great interest and use as a text and reference work for professionals, teachers and students across a wide range of disciplines, including the health sciences, general biology, and food science and technology. The provision of handy ‘explanation of terms'means that those with a general interest in science can also read the book with enjoyment.

It has been estimated that there are more microbial cells inhabiting the human body than there are eukaryotic cells of which it is made up. This normal microflora usually co-exists relatively peacefully with the host and does not cause infection. The mechanisms by which this co-existence is achieved are still not properly understood and the interaction between the normal microflora and the host is far from simple. For a variety of reasons, however, this interaction can be disturbed and often results in the microflora becoming pathogens. The study of the diseases then caused is important both in terms of treatment and in terms of contributing to our understanding of the mechanisms by which the normal microflora usually interacts with the host. This title brings together an international list of contributors, all of whom have active research interests in the normal microflora. Each of the chapters reviews current knowledge about a specific group or organism within the microflora and the diseases they can cause. Microflora of the skin, respiratory tract, oral cavity, gastrointestinal system and genital tract are all discussed and the impact of molecular methods on our understanding of the normal microflora is emphasised throughout the book. Medical microbiologists, dental specialists, infectious disease specialists, nutritionists and gastroenterologists will all find this book of immense interest and value, as will epidemiologists, dermatologists and general microbiologists.

Probiotics are products aimed at delivering living bacterial cells to the gut ecosystem of humans and other animals, whereas prebiotics are non-digestible carbohydrates delivered in food to the large bowel to provide fermentable substrates for selected bacteria. Food scientists and nutritionists have accepted, relatively uncritically, the concepts underlying the use of probiotics and prebiotics in the promotion of health. Microbiologists and medical practitioners have viewed these products more sceptically. Much more scientific and medical validation of probiotic/prebiotic use is required. This will entail the use of sophisticated analytical methodologies. Knowledge of the gut microbiota has increased dramatically during the past decade thanks largely to the results obtained from the application of nucleic acid-based methodologies. Because of the availability of improved technologies, detailed studies of the two principal kinds of probiotic/prebiotic bacteria, members of the genera Lactobacillus and Bifidobacterium, can be made. While well-established scientists continue to make important contributions to probiotic/prebiotic research, it is notable that younger scholars are playing a vital role in developing scientific concepts related to the field. Several of these emerging leaders have contributed chapters to this book that therefore represents a state-of-the-art compendium of fundamental science related to early 21st century probiotic/prebiotic research.

This new volume follows from and complements the bestselling book •Probiotics: A Critical Review• (also edited by G. W. Tannock). The new book expands and enlarges on all aspects of this highly topical subject. Leading international experts describe in detail current research and applications and in particular focus on novel issues and developing technology, and comment on the future potential of this important and exciting topic. Probiotics and Prebiotics: Where Are We Going? contains state-of-the-art commentaries on all aspects of theintestinal microflora and probiotics and provides an authoritative review of important aspects of probiotic and prebiotic research. Written by leading experts in the field, each chapter affords a critical insight to a particular topic, reviews current research, discusses future direction and aims to stimulate discussion. Topics covered include the genomics of probiotic microorganisms, the developing technologies for analysis of gut microorganisms, evaluation and future potential of prebiotic substances, and the potential for disease prevention in the host by probiotic organisms. An essential text for all microbiologists, health professionals, biotechnologists, pharmaceutial companies, dairy and food scientists.