Probing Gut Bacterial Physiology and Antibiotic Action in Complex Environments

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (124 download)

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Book Synopsis Probing Gut Bacterial Physiology and Antibiotic Action in Complex Environments by : Andrés Jesus Aranda-Díaz

Download or read book Probing Gut Bacterial Physiology and Antibiotic Action in Complex Environments written by Andrés Jesus Aranda-Díaz and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: For decades, research on bacterial physiology has been conducted in standardized conditions in monocultures, ignoring the natural community context of most species. As a result, predicting the effect of perturbations such as antibiotics on gut microbial communities remains highly challenging despite its paramount importance. Mechanistic understanding of human gut microbiota ecology has also been hampered by limited throughput and the fact that key parameters often cannot be precisely tuned or measured in animal models. During this PhD, I developed tools and systems to interrogate bacterial physiology in complex communities and within animal hosts, and used these tools to make seminal discoveries regarding how life in a community alters the behaviors of individuals. The gut microbiota of the laboratory fruit fly is a low diversity consortium with 5 bacterial species from the Lactobacillus and Acetobacter genera, all of which can be cultured in vitro. I leveraged the simplicity and manipulability of this microbiota to study the role of metabolic cross feeding on growth and antibiotic action. Using in vitro synthetic communities composed of Lactobacillus and Acetobacter species, I discovered non-canonical tolerance to rifampin and erythromycin that is induced by interspecies interactions and mediated by changes in pH due to metabolic cross-feeding. Additionally, I developed imaging techniques to visualize individual bacterial cells within live fruit flies, opening the door to studying single-cell bacterial physiology within intact hosts. To enable quantitative, systematic experimentation on the human gut microbiota, I developed culturing techniques to directly compare responses in vitro and in humanized mice. I compared the sensitivity of gut commensals in vitro and in humanized mice to explore the role of heterogeneous environments and community composition in antibiotic action. I then cultured hundreds of communities that resemble the human gut microbiota using fecal samples as inocula for high-throughput liquid culturing. In vitro antibiotic treatment of these communities recapitulated changes observed in vivo in mice, and uncovered different modes of recovery, highlighting the capabilities of this methodology. .

The Social Biology of Microbial Communities

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Publisher : National Academies Press
ISBN 13 : 0309264324
Total Pages : 633 pages
Book Rating : 4.3/5 (92 download)

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Book Synopsis The Social Biology of Microbial Communities by : Institute of Medicine

Download or read book The Social Biology of Microbial Communities written by Institute of Medicine and published by National Academies Press. This book was released on 2013-01-10 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning with the germ theory of disease in the 19th century and extending through most of the 20th century, microbes were believed to live their lives as solitary, unicellular, disease-causing organisms . This perception stemmed from the focus of most investigators on organisms that could be grown in the laboratory as cellular monocultures, often dispersed in liquid, and under ambient conditions of temperature, lighting, and humidity. Most such inquiries were designed to identify microbial pathogens by satisfying Koch's postulates.3 This pathogen-centric approach to the study of microorganisms produced a metaphorical "war" against these microbial invaders waged with antibiotic therapies, while simultaneously obscuring the dynamic relationships that exist among and between host organisms and their associated microorganisms-only a tiny fraction of which act as pathogens. Despite their obvious importance, very little is actually known about the processes and factors that influence the assembly, function, and stability of microbial communities. Gaining this knowledge will require a seismic shift away from the study of individual microbes in isolation to inquiries into the nature of diverse and often complex microbial communities, the forces that shape them, and their relationships with other communities and organisms, including their multicellular hosts. On March 6 and 7, 2012, the Institute of Medicine's (IOM's) Forum on Microbial Threats hosted a public workshop to explore the emerging science of the "social biology" of microbial communities. Workshop presentations and discussions embraced a wide spectrum of topics, experimental systems, and theoretical perspectives representative of the current, multifaceted exploration of the microbial frontier. Participants discussed ecological, evolutionary, and genetic factors contributing to the assembly, function, and stability of microbial communities; how microbial communities adapt and respond to environmental stimuli; theoretical and experimental approaches to advance this nascent field; and potential applications of knowledge gained from the study of microbial communities for the improvement of human, animal, plant, and ecosystem health and toward a deeper understanding of microbial diversity and evolution. The Social Biology of Microbial Communities: Workshop Summary further explains the happenings of the workshop.

Emerging Organic Contaminants and Human Health

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Publisher : Springer
ISBN 13 : 364228132X
Total Pages : 475 pages
Book Rating : 4.6/5 (422 download)

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Book Synopsis Emerging Organic Contaminants and Human Health by : Damia Barcelo

Download or read book Emerging Organic Contaminants and Human Health written by Damia Barcelo and published by Springer. This book was released on 2012-04-17 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides an overview of the occurrence and fate of emerging contaminants, discusses advanced chemical analysis methods, toxicological and ecotoxicological effects as well as human exposure. One focus is on pharmaceuticals, in particular antibiotics, and the problems associated with their increased use in hospitals. Other covered emerging contaminants occurring e.g. in food, water, air or soil include brominated flame retardants, polar pesticides, phthalates, phosphate esters, perfluorinated compounds, personal care products, musk fragrances, disinfection byproducts, illicit drugs, and nanomaterials. The chapters written by experts are a valuable source of information for a broad audience, such as analytical chemists, environmental chemists and engineers, toxicologists, ecotoxicologists and epidemiologists working already in this field as well as newcomers.

Bacterial Biofilms

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Publisher : Springer Science & Business Media
ISBN 13 : 3540754180
Total Pages : 302 pages
Book Rating : 4.5/5 (47 download)

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Book Synopsis Bacterial Biofilms by : Tony Romeo

Download or read book Bacterial Biofilms written by Tony Romeo and published by Springer Science & Business Media. This book was released on 2008-02-26 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout the biological world, bacteria thrive predominantly in surface-attached, matrix-enclosed, multicellular communities or biofilms, as opposed to isolated planktonic cells. This choice of lifestyle is not trivial, as it involves major shifts in the use of genetic information and cellular energy, and has profound consequences for bacterial physiology and survival. Growth within a biofilm can thwart immune function and antibiotic therapy and thereby complicate the treatment of infectious diseases, especially chronic and foreign device-associated infections. Modern studies of many important biofilms have advanced well beyond the descriptive stage, and have begun to provide molecular details of the structural, biochemical, and genetic processes that drive biofilm formation and its dispersion. There is much diversity in the details of biofilm development among various species, but there are also commonalities. In most species, environmental and nutritional conditions greatly influence biofilm development. Similar kinds of adhesive molecules often promote biofilm formation in diverse species. Signaling and regulatory processes that drive biofilm development are often conserved, especially among related bacteria. Knowledge of such processes holds great promise for efforts to control biofilm growth and combat biofilm-associated infections. This volume focuses on the biology of biofilms that affect human disease, although it is by no means comprehensive. It opens with chapters that provide the reader with current perspectives on biofilm development, physiology, environmental, and regulatory effects, the role of quorum sensing, and resistance/phenotypic persistence to antimicrobial agents during biofilm growth.

Treating Infectious Diseases in a Microbial World

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Publisher : National Academies Press
ISBN 13 : 0309180686
Total Pages : 102 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Treating Infectious Diseases in a Microbial World by : National Research Council

Download or read book Treating Infectious Diseases in a Microbial World written by National Research Council and published by National Academies Press. This book was released on 2006-01-03 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Humans coexist with millions of harmless microorganisms, but emerging diseases, resistance to antibiotics, and the threat of bioterrorism are forcing scientists to look for new ways to confront the microbes that do pose a danger. This report identifies innovative approaches to the development of antimicrobial drugs and vaccines based on a greater understanding of how the human immune system interacts with both good and bad microbes. The report concludes that the development of a single superdrug to fight all infectious agents is unrealistic.

The Effects on Human Health of Subtherapeutic Use of Antimicrobials in Animal Feeds

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Publisher : National Academies Press
ISBN 13 : 0309030447
Total Pages : 393 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis The Effects on Human Health of Subtherapeutic Use of Antimicrobials in Animal Feeds by : National Research Council

Download or read book The Effects on Human Health of Subtherapeutic Use of Antimicrobials in Animal Feeds written by National Research Council and published by National Academies Press. This book was released on 1980-02-01 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Antibiotics

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Publisher : John Wiley & Sons
ISBN 13 : 1555819311
Total Pages : 477 pages
Book Rating : 4.5/5 (558 download)

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Book Synopsis Antibiotics by : Christopher Walsh

Download or read book Antibiotics written by Christopher Walsh and published by John Wiley & Sons. This book was released on 2020-08-06 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: A chemocentric view of the molecular structures of antibiotics, their origins, actions, and major categories of resistance Antibiotics: Challenges, Mechanisms, Opportunities focuses on antibiotics as small organic molecules, from both natural and synthetic sources. Understanding the chemical scaffold and functional group structures of the major classes of clinically useful antibiotics is critical to understanding how antibiotics interact selectively with bacterial targets. This textbook details how classes of antibiotics interact with five known robust bacterial targets: cell wall assembly and maintenance, membrane integrity, protein synthesis, DNA and RNA information transfer, and the folate pathway to deoxythymidylate. It also addresses the universe of bacterial resistance, from the concept of the resistome to the three major mechanisms of resistance: antibiotic destruction, antibiotic active efflux, and alteration of antibiotic targets. Antibiotics also covers the biosynthetic machinery for the major classes of natural product antibiotics. Authors Christopher Walsh and Timothy Wencewicz provide compelling answers to these questions: What are antibiotics? Where do antibiotics come from? How do antibiotics work? Why do antibiotics stop working? How should our limited inventory of effective antibiotics be addressed? Antibiotics is a textbook for graduate courses in chemical biology, pharmacology, medicinal chemistry, and microbiology and biochemistry courses. It is also a valuable reference for microbiologists, biological and natural product chemists, pharmacologists, and research and development scientists.

Fields of Victory

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Publisher : Independently Published
ISBN 13 : 9781730826528
Total Pages : 150 pages
Book Rating : 4.8/5 (265 download)

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Book Synopsis Fields of Victory by : Mary Augusta Ward

Download or read book Fields of Victory written by Mary Augusta Ward and published by Independently Published. This book was released on 2018-11-06 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fields of Victory: Large Print by Mary Augusta WardIt is a bold thing, I fear, to offer the public yet more letters based on a journey through the battle-fields of France-especially at a moment when impressions are changing so fast, when the old forms of writing about the war seem naturally out of date, or even distasteful, and the new are not yet born.

Bacterial Persistence

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Publisher : Humana
ISBN 13 : 9781493928538
Total Pages : 0 pages
Book Rating : 4.9/5 (285 download)

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Book Synopsis Bacterial Persistence by : Jan Michiels

Download or read book Bacterial Persistence written by Jan Michiels and published by Humana. This book was released on 2015-10-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a comprehensive collection of methods that have been instrumental to the current understanding of bacterial persisters. Chapters in the book cover topics ranging from general methods for measuring persister levels in Escherichia coli cultures, protocols for the determination of the persister subpopulation in Candida albicans, quantitative measurements of Type I and Type II persisters using ScanLag, to in vitro and in vivo models for the study of the intracellular activity of antibiotics. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and cutting-edge, Bacterial Persistence: Methods and Protocols brings together the most respected researchers in bacterial persistence whose studies will remain vital to understanding this field for many years to come.

Aquaculture Nutrition

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Publisher : John Wiley & Sons
ISBN 13 : 0470672714
Total Pages : 519 pages
Book Rating : 4.4/5 (76 download)

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Book Synopsis Aquaculture Nutrition by : Daniel L. Merrifield

Download or read book Aquaculture Nutrition written by Daniel L. Merrifield and published by John Wiley & Sons. This book was released on 2014-10-20 with total page 519 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manipulation of the microbial gut content of farmed fishes and crustaceans can have a marked effect on their general health, growth, and quality. Expertly covering the science behind the use of prebiotics and probiotics this landmark book explains how the correct manipulation of the gut flora of farmed fishes and crustaceans can have a positive effect on their health, growth rates, feed utilization, and general wellbeing. Aquaculture Nutrition: Gut Health, Probiotics and Prebiotics provides a comprehensive overview of the current knowledge of the gut microbiomes of fish and their importance with respect to host-fish health and performance, providing in-depth, cutting-edge fundamental and applied information. Written by many of the world’s leading authorities and edited by Dr Daniel Merrifield and Professor Einar Ringø, this important book discusses in detail the common mechanisms for modulating microbiomes, particularly at the gut level (e.g. probiotics, prebiotics and synbiotics). The book is a key resource for an understanding of the historical development of these products, their known mechanisms of action and their degree of efficacy as presently demonstrated in the literature. The fundamental material provided on the gut microbiota itself, and more broad aspects of microbe-live feed interactions, provide essential reading for researchers, academics and students in the areas of aquaculture nutrition, fish veterinary science, microbiology, aquaculture, fish biology and fisheries. Those involved in the development and formulation of aquaculture feeds and those with broader roles within the aquaculture industry will find a huge wealth of commercially-important information within the book’s covers. All libraries in universities and research establishments where biological sciences, nutrition and aquaculture are studied and taught, should have copies of this excellent book on their shelves.

Environmental Chemicals, the Human Microbiome, and Health Risk

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Publisher : National Academies Press
ISBN 13 : 0309468698
Total Pages : 123 pages
Book Rating : 4.3/5 (94 download)

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Book Synopsis Environmental Chemicals, the Human Microbiome, and Health Risk by : National Academies of Sciences, Engineering, and Medicine

Download or read book Environmental Chemicals, the Human Microbiome, and Health Risk written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2018-03-01 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: A great number of diverse microorganisms inhabit the human body and are collectively referred to as the human microbiome. Until recently, the role of the human microbiome in maintaining human health was not fully appreciated. Today, however, research is beginning to elucidate associations between perturbations in the human microbiome and human disease and the factors that might be responsible for the perturbations. Studies have indicated that the human microbiome could be affected by environmental chemicals or could modulate exposure to environmental chemicals. Environmental Chemicals, the Human Microbiome, and Health Risk presents a research strategy to improve our understanding of the interactions between environmental chemicals and the human microbiome and the implications of those interactions for human health risk. This report identifies barriers to such research and opportunities for collaboration, highlights key aspects of the human microbiome and its relation to health, describes potential interactions between environmental chemicals and the human microbiome, reviews the risk-assessment framework and reasons for incorporating chemicalâ€"microbiome interactions.

Antibiotics

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Publisher : John Wiley & Sons
ISBN 13 : 3527659706
Total Pages : 549 pages
Book Rating : 4.5/5 (276 download)

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Book Synopsis Antibiotics by : Claudio O. Gualerzi

Download or read book Antibiotics written by Claudio O. Gualerzi and published by John Wiley & Sons. This book was released on 2013-09-05 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most of the antibiotics now in use have been discovered more or less by chance, and their mechanisms of action have only been elucidated after their discovery. To meet the medical need for next-generation antibiotics, a more rational approach to antibiotic development is clearly needed. Opening with a general introduction about antimicrobial drugs, their targets and the problem of antibiotic resistance, this reference systematically covers currently known antibiotic classes, their molecular mechanisms and the targets on which they act. Novel targets such as cell signaling networks, riboswitches and bacterial chaperones are covered here, alongside the latest information on the molecular mechanisms of current blockbuster antibiotics. With its broad overview of current and future antibacterial drug development, this unique reference is essential reading for anyone involved in the development and therapeutic application of novel antibiotics.

Microbiology Abstracts

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ISBN 13 :
Total Pages : 1052 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis Microbiology Abstracts by :

Download or read book Microbiology Abstracts written by and published by . This book was released on 1992-10 with total page 1052 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ending the War Metaphor

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Publisher : National Academies Press
ISBN 13 : 0309096014
Total Pages : 306 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Ending the War Metaphor by : Institute of Medicine

Download or read book Ending the War Metaphor written by Institute of Medicine and published by National Academies Press. This book was released on 2006-07-09 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infectious diseases have existed longer than us, as long as us, or are relatively newer than us. It may be the case that a disease has existed for many, many years but has only recently begun affecting humans. At the turn of the century the number of deaths caused by infections in the United States had been falling steadily but since the '80s has seen an increase. In the past 30 years alone 37 new pathogens have been identified as human disease threats and 12% of known human pathogens have been classified as either emerging or remerging. Whatever the story, there is currently a "war" on infectious diseases. This war is simply the systematic search for the microbial "cause" of each disease, followed by the development of antimicrobial therapies. The "war" on infectious diseases, however, must be revisited in order to develop a more realistic and detailed picture of the dynamic interactions among and between host organisms and their diverse populations of microbes. Only a fraction of these microbes are pathogens. Thus, in order to explore the crafting of a new metaphor for host-microbe relationships, and to consider how such a new perspective might inform and prioritize biomedical research, the Forum on Microbial Threats of the Institute of Medicine (IOM) convened the workshop, Ending the War Metaphor: The Changing Agenda for Unraveling the Host-Microbe Relationship on March 16-17, 2005. Workshop participants examined knowledge and approaches to learning about the bacterial inhabitants of the human gut, the best known host-microbe system, as well as findings from studies of microbial communities associated with other mammals, fish, plants, soil, and insects. The perspective adopted by this workshop is one that recognizes the breadth and diversity of host-microbe relationships beyond those relative few that result in overt disease. Included in this summary are the reports and papers of individuals participating in the Forum as well as the views of the editors.

Microbial Ecology in States of Health and Disease

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Publisher : National Academies Press
ISBN 13 : 0309290651
Total Pages : 436 pages
Book Rating : 4.3/5 (92 download)

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Book Synopsis Microbial Ecology in States of Health and Disease by : Institute of Medicine

Download or read book Microbial Ecology in States of Health and Disease written by Institute of Medicine and published by National Academies Press. This book was released on 2014-02-18 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Individually and collectively, resident microbes play important roles in host health and survival. Shaping and shaped by their host environments, these microorganisms form intricate communities that are in a state of dynamic equilibrium. This ecologic and dynamic view of host-microbe interactions is rapidly redefining our view of health and disease. It is now accepted that the vast majority of microbes are, for the most part, not intrinsically harmful, but rather become established as persistent, co-adapted colonists in equilibrium with their environment, providing useful goods and services to their hosts while deriving benefits from these host associations. Disruption of such alliances may have consequences for host health, and investigations in a wide variety of organisms have begun to illuminate the complex and dynamic network of interaction - across the spectrum of hosts, microbes, and environmental niches - that influence the formation, function, and stability of host-associated microbial communities. Microbial Ecology in States of Health and Disease is the summary of a workshop convened by the Institute of Medicine's Forum on Microbial Threats in March 2013 to explore the scientific and therapeutic implications of microbial ecology in states of health and disease. Participants explored host-microbe interactions in humans, animals, and plants; emerging insights into how microbes may influence the development and maintenance of states of health and disease; the effects of environmental change(s) on the formation, function, and stability of microbial communities; and research challenges and opportunities for this emerging field of inquiry.

Desk Encyclopedia of Microbiology

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Publisher : Academic Press
ISBN 13 : 0080961282
Total Pages : 1277 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis Desk Encyclopedia of Microbiology by : Moselio Schaechter

Download or read book Desk Encyclopedia of Microbiology written by Moselio Schaechter and published by Academic Press. This book was released on 2010-04-19 with total page 1277 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Desk Encyclopedia of Microbiology, Second Edition is a single-volume comprehensive guide to microbiology for the advanced reader. Derived from the six volume e-only Encyclopedia of Microbiology, Third Edition, it bridges the gap between introductory texts and specialized reviews. Covering topics ranging from the basic science of microbiology to the current "hot" topics in the field, it will be invaluable for obtaining background information on a broad range of microbiological topics, preparing lectures and preparing grant applications and reports. - The most comprehensive single-volume source providing an overview of microbiology to non-specialists - Bridges the gap between introductory texts and specialized reviews - Provides concise and general overviews of important topics within the field making it a helpful resource when preparing for lectures, writing reports, or drafting grant applications

Research Awards Index

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Publisher :
ISBN 13 :
Total Pages : 776 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Research Awards Index by :

Download or read book Research Awards Index written by and published by . This book was released on 1989 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt: