Persister Cells and Infectious Disease


Book Description

This volume is a collection of chapters from the leading experts in the relatively new and burgeoning field of persister cell studies. Persisters play a leading role in the recalcitrance of chronic infections, and enable the development of classical antibiotic resistance. The focus of the book is on studies that provide an understanding of the mechanisms of persister formation, antibiotic tolerance and role in disease, at the molecular level.




Antibiotic Resistance


Book Description

This book describes antibiotic resistance amongst pathogenic bacteria. It starts with an overview of the erosion of the efficacy of antibiotics by resistance and the decrease in the rate of replacement of redundant compounds. The origins of antibiotic resistance are then described. It is proposed that there is a large bacterial resistome which is a collection of all resistance genes and their precursors in both pathogenic and non-pathogenic bacteria. Ongoing resistance surveillance programs are also discussed, together with the perspective of a clinical microbiologist. The book then turns to specific themes such as the most serious area of resistance in pathogens, namely in Gram-negative organisms. The role of combinations of antibiotics in combating resistance emergence is discussed, particularly in the tuberculosis field, and then the importance of non-multiplying and persistent bacteria which are phenotypically resistant to antibiotics and prolong the duration of therapy of antibiotics which leads to poor compliance and resistance emergence. The role of anti-microbial compounds in textiles is covered, with its potential to exacerbate the spread of resistance. Then, efflux pumps are discussed. The final chapter describes the compounds which are in late stage clinical development, illustrating the paucity of the antibiotic pipeline, especially for Gram-negative bacteria.




Bacterial Persistence


Book Description

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.




Bacterial Biofilms


Book Description

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.




Persistent Bacterial Infections


Book Description

An examination of persistent bacterial infections in the light of ecological and evolutionary principles. - Focuses on the principles of parasitism and commensalism and our ability to distinguish the two states. - Explores the ways in which persistent infections differ from acute, self-limiting bacterial infections and how both differ from the nonpathogenic commensal state. - Addresses coevolution, host adaptation, natural selection, and other fundamental biological principles. - Serves as a resource for investigators and advanced students in the field of bacterial pathogenesis.




Pneumonia Before Antibiotics


Book Description

“Uses [pneumonia] as a vehicle for examining the evolution of therapeutics in America between the ‘Golden Age of Microbiology’ and the ‘Age of Antibiotics.’”—Isis Focusing largely on the treatment of pneumonia in first half of the century with type-specific serotherapy, clinician-historian Scott H. Podolsky provides insight into the rise and clinical evaluation of therapeutic “specifics,” the contested domains of private practice and public health, and—as the treatment of pneumonia made the transition from serotherapy to chemotherapy and antibiotics—the tempo and mode of therapeutic change itself. Type-specific serotherapy, founded on the tenets of applied immunology, justified by controlled clinical trials, and grounded in a novel public ethos, was deemed revolutionary when it emerged to replace supportive therapeutics. With the advent of the even more revolutionary sulfa drugs and antibiotics, pneumonia ceased to be a public health concern and became instead an illness treated in individual patients by individual physicians. Podolsky describes the new therapeutics and the scientists and practitioners who developed and debated them. He finds that, rather than representing a barren era in anticipation of some unknown transformation to come, the first decades of the twentieth-century shaped the use of, and reliance upon, the therapeutic specific throughout the century and beyond. This intriguing study will interest historians of medicine and science, policymakers, and clinicians alike. “Podolsky’s scholarship is awesome, and his grasp of the philosophical and sociologic context of the issues considered make this an important work.” —New England Journal of Medicine “This thoroughly documented, carefully written book is a landmark analysis . . . It should be read by everyone who is involved in research and therapeutic development.” —JAMA




Antibiotic Resistance


Book Description

Years of using, misusing, and overusing antibiotics and other antimicrobial drugs has led to the emergence of multidrug-resistant 'superbugs.' The IOM's Forum on Microbial Threats held a public workshop April 6-7 to discuss the nature and sources of drug-resistant pathogens, the implications for global health, and the strategies to lessen the current and future impact of these superbugs.




Lyme


Book Description

"Superbly written and researched." --Booklist "Builds a strong case." --Kirkus Lyme disease is spreading rapidly around the globe as ticks move into places they could not survive before. Mary Beth Pfeiffer argues it is the first epidemic to emerge in the era of climate change, infecting millions around the globe. She tells the heart-rending stories of its victims, families whose lives have been destroyed by a single, often unseen, tick bite. Pfeiffer also warns of the emergence of other tick-borne illnesses that make Lyme more difficult to treat and pose their own grave risks. Lyme is an impeccably researched account of an enigmatic disease, making a powerful case for action to fight ticks, heal patients, and recognize humanity's role in a modern scourge.




The Molecular Mechanisms of Antibiotic Resistance in Aquatic Pathogens


Book Description

This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.




Mycobacterial Skin Infections


Book Description

This well-illustrated book is a comprehensive guide to the cutaneous clinical presentations of mycobacterial infections. The Mycobacterium genus includes over 170 species, nontuberculous mycobacteria (NTM) having been added to the obligate human pathogens such as M. tuberculosis and M. leprae. NTM are widely distributed in the environment with high isolation rates worldwide; the skin is a major target with variable clinical manifestations. A current resurgence in tuberculosis is aggravated by the synergy with human immunodeficiency virus, the breakdown of health care systems, and the rise in multidrug-resistant disease, as the incidence of leprosy remains stable, at around 250,000 new cases annually, regardless of effective antibiotic therapy. Presentations of various cutaneous infections caused by mycobacteria may be overlooked by clinicians owing the lack of familiarity with tuberculosis, leprosy, and the related NTM clinical features. This handy guide will help the dermatologist to spot the different clinical manifestations, make a prompt diagnosis, and apply effective treatment.