Have Bacteria Won

Author: Hugh Pennington
Publisher: John Wiley & Sons
ISBN: 0745690831
Size: 70.26 MB
Format: PDF
View: 7701
Today, we are far less likely to die from infection than at any other time in history, but still we worry about epidemics, the menace of antibiotic resistance and modern ?plagues? like Ebola. In this timely new book, eminent bacteriologist Hugh Pennington explores why these fears remain and why they are unfounded. He reports on outright victories (such as smallpox), battles where the enemy is on its last stand (polio), surprise attacks from vegetarian bats (Ebola, SARS) and demented cows (BSE). Qualified optimism, he argues, is the message for the future but the battles will go on forever.

Human Frontiers Environments And Disease

Author: Anthony J. McMichael
Publisher: Cambridge University Press
ISBN: 9780521004947
Size: 54.83 MB
Format: PDF, Mobi
View: 7562
This compelling account charts the relentless trajectory of humankind, and its changing survival and disease patterns, across place and time from when our ancient ancestors roamed the African Savannah to today's populous, industrialised, globalising world. This expansion of human frontiers - geographic, climatic, cultural and technological - has encountered frequent setbacks from disease, famine and dwindling resources. The social and environmental transformations wrought by agrarianism, industrialisation, fertility control, social modernisation, urbanisation and mass consumption have profoundly affected patterns of health and disease. Today, as life expectancies rise, the planet's ecosystems are being damaged by the combined weight of population size and intensive economic activity. Global warming, stratospheric ozone depletion and loss of biodiversity pose large-scale hazards to human health and survival. Recognising this, can we achieve a transition to sustainability? This and other profound questions underlie this chronicle of expansive human activity, social change, environmental impact and their health consequences.

Can Neuroscience Change Our Minds

Author: Hilary Rose
Publisher: John Wiley & Sons
ISBN: 0745689353
Size: 17.67 MB
Format: PDF, ePub, Mobi
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Neuroscience, with its astounding new technologies, is uncovering the workings of the brain and with this perhaps the mind. The 'neuro' prefix spills out into every area of life, from neuroaesthetics to neuroeconomics, neurogastronomy and neuroeducation. With its promise to cure physical and social ills, government sees neuroscience as a tool to increase the 'mental capital' of the children of the deprived and workless. It sets aside intensifying poverty and inequality, instead claiming that basing children's rearing and education on brain science will transform both the child's and the nation's health and wealth. Leading critic of such neuropretensions, neuroscientist Steven Rose and sociologist of science Hilary Rose take a sceptical look at these claims and the science underlying them, sifting out the sensible from the snake oil. Examining the ways in which science is shaped by and shapes the political economy of neoliberalism, they argue that neuroscience on its own is not able to bear the weight of these hopes.

Can Science End War

Author: Everett Dolman
Publisher: John Wiley & Sons
ISBN: 0745685978
Size: 24.95 MB
Format: PDF, ePub, Docs
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Free-roaming killer drones stalk the battlespace looking for organic targets. Human combatants are programmed to feel no pain. Highpower microwave beams detonate munitions, jam communications, and cook internal organs. Is this vision of future war possible, or even inevitable? In this timely new book, Everett Carl Dolman examines the relationship between science and war. Historically, science has played an important role in ending wars – think of the part played by tanks in breaching trench warfare in the First World War, or atom bombs in hastening the Japanese surrender in the Second World War – but to date this has only increased the danger and destructiveness of future conflicts. Could science ever create the con-ditions of a permanent peace, either by making wars impossible to win, or so horrific that no one would ever fight? Ultimately, Dolman argues that science cannot, on its own, end war without also ending what it means to be human.

Can Science Resolve The Nature Nurture Debate

Author: Margaret Lock
Publisher: John Wiley & Sons
ISBN: 0745690009
Size: 12.18 MB
Format: PDF
View: 1662
Following centuries of debate about "nature and nurture" the discovery of DNA established the idea that nature (genes) determines who we are, relegating nurture (environment) to icing on the cake. Since the 1950s, the new science of epigenetics has demonstrated how cellular environments and certain experiences and behaviors influence gene expression at the molecular level, with significant implications for health and wellbeing. To the amazement of scientists, mapping the human genome indirectly supported these insights. Anthropologists Margaret Lock and Gisli Palsson outline vituperative arguments from Classical times about the relationship between nature and nurture, furthered today by epigenetic findings and the demonstration of a "reactive genome." The nature/nurture debate, they show, can never be put to rest, because these concepts are in constant flux in response to the new insights science continually offers.

Bacterial Exotoxins How Bacteria Fight The Immune System

Author: Inka Sastalla
Publisher: Frontiers Media SA
ISBN: 2889199916
Size: 29.51 MB
Format: PDF
View: 7607
Bacterial pathogenicity factors are functionally diverse. They may facilitate the adhesion and colonization of bacteria, influence the host immune response, assist spreading of the bacterium by e.g. evading recognition by immune cells, or allow bacteria to dwell within protected niches inside the eukaryotic cell. Exotoxins can be single polypeptides or heteromeric protein complexes that act on different parts of the cells. At the cell surface, they may insert into the membrane to cause damage; bind to receptors to initiate their uptake; or facilitate the interaction with other cell types. For example, bacterial superantigens specifically bind to major histocompatibility complex (MHC) II molecules on the surface of antigen presenting cells and the T cell receptor, while cytolysins cause pore formation. For intracellular activity, exotoxins need to be translocated across the eukaryotic membrane. Gram-negative bacteria can directly inject effector proteins in a receptor-independent manner by use of specialized needle apparatus such as bacterial type II, III, or type IV secretion systems. Other methods of translocation include the phagocytic uptake of bacteria followed by toxin secretion, or receptor-mediated endocytosis which allows the targeting of distinct cell types. Receptor-based uptake is initiated by the binding of heteromeric toxin complexes to the cell surface and completed by the translocation of the effector protein(s) across the endosomal membrane. In the cytosol, toxins interact with specific eukaryotic target proteins to cause post-translational modifications that often result in the manipulation of cellular signalling cascades and inflammatory responses. It has become evident that the actions of some bacterial toxins may exceed their originally assumed cytotoxic function. For example, pore-forming toxins do not only cause cytolysis, but may also induce autophagy, pyroptosis, or activation of the MAPK pathways, resulting in adjustment of the host immune response to infection and modification of inflammatory responses both locally and systemically. Other recently elucidated examples of the immunomodulatory function of cell death-inducing exotoxins include TcdB of Clostridium difficile which activates the inflammasome through modification of cellular Rho GTPases, or the Staphyloccocus d-toxin which activates mast cells. The goal of this research topic was to gather current knowledge on the interaction of bacterial exotoxins and effector proteins with the host immune system. The following 16 research and review articles in this special issue describe mechanisms of immune modification and evasion and provide an overview over the complexity of bacterial toxin interaction with different cells of the immune system.

Bifidobacteria And Their Role In The Human Gut Microbiota

Author: Francesca Turroni
Publisher: Frontiers Media SA
ISBN: 2889451003
Size: 41.25 MB
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The human intestine is home of an almost inconceivable large number of microorganisms. The human gut microbiota can therefore be pictured as an organ placed within a host organism. The human gut microbiome, which in total may contain >100 times the number of genes present in our genome, endows us with functional features that we did not have to evolve ourselves. It is recognized that intestinal microbiota plays an important role in human health and disease. In fact, gut bacteria other than metabolize dietary components, may play complex roles such as modulation of the immune system and in reduction of gut infections. Variations in the presence and/or abundance of certain components of the intestinal microbiota have repeatedly been observed in patients that suffer from atopic diseases, inflammatory bowel disease, Crohn disease, ulcerative colitis, infectious colitis, colon cancer and diabetes. In this context, bifidobacteria represent one of the most common bacterial members of the human gut microbiota. Bifidobacteria are anaerobic, Gram-positive, irregular or branched rod-shaped bacteria that are commonly found in the gastro-intestinal tracts (GIT) of humans, especially during the first stages of life and most animal and insects. Bifidobacterial fluctuations seem directly associated with health effects and for these reasons they are being exploited as health-promoting or probiotic bacteria. However, despite the extensive commercial exploitation of bifidobacteria as probiotic bacteria, little is known about their impact or dependency on other members of the human gut microbiota or on their host. Genome analyses have highlighted the existence of gene repertoires encoding products that are responsible for the adaptation of bifidobacteria to the human intestine and intense research efforts at international level are ongoing to understand the molecular details of these interactions. Specifically, the molecular interactions that are presumed to exist between bifidobacteria and the human host, as well as interactions between different residents of intestinal microbiota are the main topic of bifidobacterial research communities.

Invisible Frontiers

Author: Stephen S. Hall
Publisher: Oxford University Press, USA
ISBN: 9780195151596
Size: 32.63 MB
Format: PDF, ePub, Docs
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Author Stephen Hall weaves together the scientific, social and political threads of this story - the fierce rivalry between labs, the fateful clash of egos within labs, the invasion of academia by commerce, the public fears about genetic engineering, the threat of government regulation, and the ultimate triumph of modern biology - to give us an outstanding tale of scientific research."--BOOK JACKET.

Quorum Sensing Vs Quorum Quenching A Battle With No End In Sight

Author: Vipin Chandra Kalia
Publisher: Springer
ISBN: 8132219821
Size: 74.48 MB
Format: PDF, Kindle
View: 6654
Microbial relationships with all life forms can be as free living, symbiotic or pathogenic. Human beings harbor 10 times more microbial cells than their own. Bacteria are found on the skin surface, in the gut and other body parts. Bacteria causing diseases are the most worrisome. Most of the infectious diseases are caused by bacterial pathogens with an ability to form biofilm. Bacteria within the biofilm are up to 1000 times more resistant to antibiotics. This has taken a more serious turn with the evolution of multiple drug resistant bacteria. Health Departments are making efforts to reduce high mortality and morbidity in man caused by them. Bacterial Quorum sensing (QS), a cell density dependent phenomenon is responsible for a wide range of expressions such as pathogenesis, biofilm formation, competence, sporulation, nitrogen fixation, etc. Majority of these organisms that are important for medical, agriculture, aquaculture, water treatment and remediation, archaeological departments are: Aeromonas, Acinetobacter, Bacillus, Clostridia, Enterococcus, Pseudomonas, Vibrio and Yersinia spp. Biosensors and models have been developed to detect QS systems. Strategies for inhibiting QS system through natural and synthetic compounds have been presented here. The biotechnological applications of QS inhibitors (QSIs) in diverse areas have also been dealt with. Although QSIs do not affect growth and are less likely to impose selective pressure on bacteria, however, a few reports have raised doubts on the fate of QSIs. This book addresses a few questions. Will bacteria develop mechanisms to evade QSIs? Are we watching yet another defeat at the hands of bacteria? Or will we be acting intelligently and survive the onslaughts of this Never Ending battle?

Grant Application Writer S Handbook

Author: Liane Reif-Lehrer
Publisher: Jones & Bartlett Learning
ISBN: 9780763716424
Size: 60.52 MB
Format: PDF, Mobi
View: 494
In this era of tight budgets, it takes more than just a good idea to get a grant funded. In this book, Dr. Liane Reif-Lehrer tells you how to optimize your chances for success. She shows you, step-by-step, how to plan and develop a good proposal, explains what reviewers look for in applications, and discusses changes at NIH and NSF. the advice in this book is useful for many types of grant applications, business plans, journal articles, and research reports.