Microbial Biofilms Role In Human Infectious Diseases

Microbial biofilms: Role in Human Infectious Diseases focuses on new and emerging concepts in microbial biofilm research, such as the mechanisms of biofilm formation, biofilm-induced pathogenesis, biofilm detection/and diagnosis, gene exchange within biofilms, strategies to control microbial biofilms and the burden of biofilm associated infections. In addition, it highlights the various anti-biofilm strategies such as surface coating, signal quenching, novel compounds that can be translated to curb biofilm-associated infections and the escalation of antimicrobial resistance determinants. Microbial biofilms can be a serious problem in medical settings as they are associated with significant mortality and morbidity. Infection related to biofilms increases recovery time and the cost of disease management. Biofilms are resistant to known antibiotics and human defense mechanism. In addition, due to close proximity of microbes within biofilms, increase genetic transformation has been detected results in increases frequency of antibiotic gene spread. With the advancement in science and technology, novel strategies have been proposed to combat the impact of biofilms on human health. Fulfills the knowledge gap in biofilm study Focuses on new and emerging concepts in microbial biofilm research Highlights the various anti-biofilm strategies Provides concise, thorough and up-to-date information about the important role of microbial biofilms in human diseases

This book highlights treatment strategies for bacterial biofilms in connection with a variety of human diseases. In particular, it reviews bacterial biofilm formation and its mechanism. Topics covered include biofilms in human health, the role of biofilms in mediating human diseases, and methods for testing bacterial biofilms. Further sections concentrate on biofilm-mediated diseases in different parts of the human gastrointestinal tract, while therapeutic strategies for biofilm control and natural agents that disrupt bacterial biofilms are also covered. Readers will also find the latest advances in probiotics and biofilms, as well as the use of probiotics to counteract biofilm-associated infections. Biofilms and antimicrobial resistance are discussed. Subsequent chapters address the management of inflammatory bowel disease via probiotics biofilms, as well as the role of probiotics bacteria in the treatment of human diseases associated with bacterial biofilms. The book is chiefly intended for clinicians/scientists in the fields of medical microbiology, applied microbiology, biochemistry, and biotechnology.

This book will cover both the evidence for biofilms in many chronic bacterial infections as well as the problems facing these infections such as diagnostics and treatment regimes. A still increasing interest and emphasis on the sessile bacterial lifestyle biofilms has been seen since it was realized that that less than 0.1% of the total microbial biomass lives in the planktonic mode of growth. The term was coined in 1978 by Costerton et al. who defined the term biofilm for the first time.In 1993 the American Society for Microbiology (ASM) recognised that the biofilmmode of growth was relevant to microbiology. Lately many articles have been published on the clinical implications of bacterial biofilms. Both original articles and reviews concerning the biofilm problem are available.

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.

Bacterial biofilm is a complex structure with diverse bacterial cells in a highly organized and ordered group within a matrix of extracellular polymeric substances they produce. Microbes attach to surfaces to develop biofilms, a sophisticated process regulated by factors such as nutritional status and biotic/abiotic surface features. An established biofilm structure mainly comprises bacterial cells, proteins, nucleic acid, and exo-polysaccharides that are extracellular macromolecules excreted as tightly bound layers in microbes, providing a perfect niche for bacteria to exchange genetic material between cells. In addition, bacterial cells in the matrix also communicate via quorum sensing, which greatly impacts biofilm processes. Under clinical circumstances, bacterial biofilm shows great resistance to antibiotics, disinfectants, and body defense systems, making it difficult for clinicians to eradicate and facilitate many infectious disease processes, leading to chronic infections of patients with long-term hospitalization and high mortality rates. Therefore, it is very important to understand the recent advances in forming, regulating, and eradicating biofilms in human infections to better prevent, control, and treat biofilm infections in humans. Written by an international team of basic and clinical researchers, the chapters of this book provide novel insights and advanced knowledge for life science researchers, clinical researchers, doctors, and other interested readers on some of the latest developments in biofilms.

Approximately 60% of all hospital-associated infections, over one million cases per year, are due to biofilms that have formed on indwelling medical devices. Device-related biofilm infections increase hospital stays and add over one billion dollars/year to U.S. hospitalization costs. Since the use and the types of indwelling medical devices commonly used in modern healthcare are continuously expanding, especially with an aging population, the incidence of biofilm infections will also continue to rise. The central problem with microbial biofilm infections of foreign bodies is their propensity to resist clearance by the host immune system and all antimicrobial agents tested to date. In fact, compared to their free floating, planktonic counterparts, microbes within a biofilm are 50 – 500 times more resistant to antimicrobial agents. Therefore, achieving therapeutic and non-lethal dosing regimens within the human host is impossible. The end result is a conversion from an acute infection to one that is persistent, chronic, and recurrent, most often requiring device removal in order to eliminate the infection. This text will describe the major types of device-related infections, and will explain the host, pathogen, and the unique properties of their interactions in order to gain a better understanding of these recalcitrant infections.

This book reviews the current concepts in biofilm formation and its implications in human health and disease. The initial chapters introduce the mechanisms of biofilm formation and its composition. Subsequently, the chapters discuss the role of biofilm in acute and chronic infections. It also explores the pivotal role of both innate and adaptive immunity on the course of biofilm infection. In addition, the book elucidates the bacterial biofilm formation on implantable devices and the current approaches to its treatment and prevention. It analyzes the possible relationship between antimicrobial resistance and biofilm formation. Finally, the book also summarizes the current state-of-the-art therapeutic approaches for preventing and treating biofilms. This book is a useful resource for researchers in the field of microbiology, clinical microbiology, and also medical practitioners.

Microbial Biofilms: Omics Biology, Antimicrobials and Clinical Implications is a comprehensive survey of microbial biofilms and their role in human health and disease with contributions from world renowned experts in molecular microbiology, proteomics, genomics, metabolomics and infectious diseases. The book is intended to serve as a guide for students, as well as a reference for researchers, clinicians and industry professionals. The chapters cover bacterial and fungal microbiomes, and the latest omics techniques organized in a clear and up-to-date manner. One of the highlights of this book is the comprehensive information on "omics of microbial biofilms". The chapters dedicated to metagenomics, proteomics and metabolomics are designed to provide a simple and holistic review of the current knowledge and, the applications of these techniques in the field of microbial biofilms. In addition to introductory chapters on microbial biofilms and their clinical implications, subsequent chapters delve into oral biofilms, their composition, and metagenomic diversity. Thereafter, mechanisms of drug resistance in microbial biofilms are reviewed, as well as the proteomic and metabolomic characterization of this resistance. The book includes a comprehensive discussion of persister cells and host–microbial interactions on mucosal surfaces. Finally, the book concludes with a summary of novel therapeutic approaches for biofilms such as synbiotics and biogenics.