Download or read book Development of Molecular Methods to Detect Infectious Viruses in Water written by T. Cromeans and published by IWA Publishing. This book was released on 2005-01-01 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enteric viruses have been detected in environmental waters and potable water supplies. Water supply safety is evaluated by examination for bacteria that are not accurate surrogates for viruses that pose a public health threat in low levels. Current viral detection methods include standard techniques for in vitro cultivation in cell cultures and newer molecular methods for viral nucleic acid detection. The new methods are rapid and sensitive, but detect only the viral nucleic acid and do not determine infectivity. Methods for the detection of potentially infectious viruses are needed. The objectives of this project were todevelop and evaluate sensitive, selective methods for infectious virus capture from water concentrates; develop and evaluate cell culture combined with rapid, sensitive RT-PCR and PCR methods for detection of infectious viruses; developmethods for rapid, sensitive, and specific quantitation of viruses; validate the performance of methods for water sample concentrates containing assay inhibitory substances; validate the ability of methods to distinguish infectious from non-infectious viruses inactivated by disinfectants with different inactivation mechanisms, free chlorine, and low pressure UV radiation; and collect, concentrate, and archive raw and finished water samples for subsequent virus analysis.New molecular tests such as RT-PCR or PCR may yield ambiguous positive results by detecting non-infectious or inactivated viruses. To overcome this problem, this study employed additional processing steps that depend on functional components of the virus needed for infection as an approach to detecting only infectious viruses. These methods were intended to preclude the detection of non-infectious viruses and increase the potential for detecting infectious viruses. Methods included the specific capture of virus by cellular receptors for virus in vitro, followed by molecular detection of viral nucleic acid in the captured virus. Another method demonstrated was the selection and detection of specific nucleic acid only present in the cell during virus replication. In addition, rapid real-time molecular tests that may be integrated with methods for the functional components were developed. The following are highlights from the project:Methods for detection of ribonucleic acid forms only present in inoculated cells after viral infection were developed and validated for two different types of viruses potentially contaminating water sources—enteroviruses and Adenoviruses. A purified cellular protein necessary for attachment of Coxsackie B viruses to cells was used to capture potentially infectious viruses for detection by RT-PCR. Real-time RT-PCR and PCR assays, complete in 30–90 minutes, were developed for enterovirus, hepatitis A virus, Adenovirus, and Norovirus detection. These assays can be used in conjunction with some of the other developed methods to detect infectious virus.The increasing need for the reuse of water and the inadvertent reuse of natural sources of water impacted by point and non-point human waste discharges make detection of infectious viruses in source and finished water supplies an important need. The researchers have developed and demonstrated several new methods for the selective detection of potentially infectious, pathogenic viruses transmitted by water. Rapid real-time molecular detection methods were developed that can be combined with the infectivity assays for rapid detection of infectious viruses. Further work can expand these methods to other viruses. These assays can be used in the future at utilities when new technology is commercially available for discrimination of infectious and non-infectious viruses.Originally published by AwwaRF for its subscribers in 2004. This publication can also be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below

Download or read book Development of Molecular Methods to Detect Infectious Viruses in Water written by Theresa L. Cromeans and published by International Water Assn. This book was released on 2005-01-01 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this project were to

Download or read book Development of Molecular Methods for Detection of Infectious Viruses in Treated Wastewater written by Theresa L. Cromeans and published by International Water Assn. This book was released on 2005-01-01 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this project we investigated the use of a metho

Download or read book Indicators for Waterborne Pathogens written by National Research Council and published by National Academies Press. This book was released on 2004-06-19 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent and forecasted advances in microbiology, molecular biology, and analytical chemistry have made it timely to reassess the current paradigm of relying predominantly or exclusively on traditional bacterial indicators for all types of waterborne pathogens. Nonetheless, indicator approaches will still be required for the foreseeable future because it is not practical or feasible to monitor for the complete spectrum of microorganisms that may occur in water, and many known pathogens are difficult to detect directly and reliably in water samples. This comprehensive report recommends the development and use of a "tool box" approach by the U.S Environmental Protection Agency and others for assessing microbial water quality in which available indicator organisms (and/or pathogens in some cases) and detection method(s) are matched to the requirements of a particular application. The report further recommends the use of a phased, three-level monitoring framework to support the selection of indicators and indicator approaches.Â

Download or read book Detection of Pathogens in Water Using Micro and Nano Technology written by Giampaolo Zuccheri and published by IWA Publishing. This book was released on 2012-08-14 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detection of Pathogens in Water Using Micro and Nano-Technology aims to promote the uptake of innovative micro and nano-technological approaches towards the development of an integrated, cost-effective nano-biological sensor useful for security and environmental assays. The book describes the concerted efforts of a large European research project and the achievements of additional leading research groups. The reported knowledge and expertise should support in the innovation and integration of often separated unitary processes. Sampling, cell lysis and DNA/RNA extraction, DNA hybridisation detection micro- and nanosensors, microfluidics, together also with computational modelling and risk assessment can be integrated in the framework of the current and evolving European regulations and needs. The development and uptake of molecular methods is revolutionizing the field of waterborne pathogens detection, commonly performed with time-consuming cultural methods. The molecular detection methods are enabling the development of integrated instruments based on biosensor that will ultimately automate the full pathway of the microbiological analysis of water. Editors: Giampaolo Zuccheri, University of Bologna, Italy and Nikolaos Asproulis, Cranfield University, UK

Download or read book Identifying Future Drinking Water Contaminants written by National Research Council and published by National Academies Press. This book was released on 1999-09-30 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: With an increasing population, use of new and diverse chemicals that can enter the water supply, and emergence of new microbial pathogens, the U.S. federal government is faced with a regulatory dilemma: Where should it focus its attention and limited resources to ensure safe drinking water supplies for the future? Identifying Future Drinking Water Contaminants is based on a 1998 workshop on emerging drinking water contaminants. It includes a dozen papers that were presented on new and emerging microbiological and chemical drinking water contaminants, associated analytical and water treatment methods for their detection and removal, and existing and proposed environmental databases to assist in their proactive identification and regulation. The papers are preceded by a conceptual approach and related recommendations to EPA for the periodic creation of future Drinking Water Contaminant Candidate Lists (CCLsâ€"produced every five yearsâ€"include currently unregulated chemical and microbiological substances that are known or anticipated to occur in public water systems and that may pose health risks).

Download or read book Molecular Biology of The Cell written by Bruce Alberts and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Management of Legionella in Water Systems written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2020-02-20 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Legionnaires' disease, a pneumonia caused by the Legionella bacterium, is the leading cause of reported waterborne disease outbreaks in the United States. Legionella occur naturally in water from many different environmental sources, but grow rapidly in the warm, stagnant conditions that can be found in engineered water systems such as cooling towers, building plumbing, and hot tubs. Humans are primarily exposed to Legionella through inhalation of contaminated aerosols into the respiratory system. Legionnaires' disease can be fatal, with between 3 and 33 percent of Legionella infections leading to death, and studies show the incidence of Legionnaires' disease in the United States increased five-fold from 2000 to 2017. Management of Legionella in Water Systems reviews the state of science on Legionella contamination of water systems, specifically the ecology and diagnosis. This report explores the process of transmission via water systems, quantification, prevention and control, and policy and training issues that affect the incidence of Legionnaires' disease. It also analyzes existing knowledge gaps and recommends research priorities moving forward.

Download or read book Microbial Threats to Health written by Institute of Medicine and published by National Academies Press. This book was released on 2003-08-25 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infectious diseases are a global hazard that puts every nation and every person at risk. The recent SARS outbreak is a prime example. Knowing neither geographic nor political borders, often arriving silently and lethally, microbial pathogens constitute a grave threat to the health of humans. Indeed, a majority of countries recently identified the spread of infectious disease as the greatest global problem they confront. Throughout history, humans have struggled to control both the causes and consequences of infectious diseases and we will continue to do so into the foreseeable future. Following up on a high-profile 1992 report from the Institute of Medicine, Microbial Threats to Health examines the current state of knowledge and policy pertaining to emerging and re-emerging infectious diseases from around the globe. It examines the spectrum of microbial threats, factors in disease emergence, and the ultimate capacity of the United States to meet the challenges posed by microbial threats to human health. From the impact of war or technology on disease emergence to the development of enhanced disease surveillance and vaccine strategies, Microbial Threats to Health contains valuable information for researchers, students, health care providers, policymakers, public health officials. and the interested public.

Download or read book What You Need to Know about Infectious Disease written by Madeline Drexler and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantitative Microbial Risk Assessment written by Charles N. Haas and published by John Wiley & Sons. This book was released on 2014-06-09 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the latest QMRA methodologies to determine infection risk cause by either accidental microbial infections or deliberate infections caused by terrorism • Reviews the latest methodologies to quantify at every step of the microbial exposure pathways, from the first release of a pathogen to the actual human infection • Provides techniques on how to gather information, on how each microorganism moves through the environment, how to determine their survival rates on various media, and how people are exposed to the microorganism • Explains how QMRA can be used as a tool to measure the impact of interventions and identify the best policies and practices to protect public health and safety • Includes new information on genetic methods • Techniques use to develop risk models for drinking water, groundwater, recreational water, food and pathogens in the indoor environment

Download or read book Viruses in Foods written by Sagar Goyal and published by Springer Science & Business Media. This book was released on 2007-01-15 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book to focus entirely on viruses in foods. It collates information on the occurrence, detection, transmission, and epidemiology of viruses in various foods. Although methods for bacterial detection in food are available, methods for detection of viruses in food, with the exception of shellfish, are not available. It is important, therefore, to develop methods for direct examination of food for viruses and to explore alternate indicators that can accurately reflect the virological quality of food. This book addresses these issues along with strategies for the prevention and control of viral contamination of food.

Download or read book Classifying Drinking Water Contaminants for Regulatory Consideration written by National Research Council and published by National Academies Press. This book was released on 2001-08-01 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Americans drink many gallons of tap water every day, but many of them question the safety of tap water every day as well. In fact, devices have been created to filter tap water directly before reaching cups. It's true; however, that the provision and management of safe drinking water throughout the United States have seen triumphs in public health since the beginning of the 20th century. Although, advances in water treatment, source water protection efforts, and the presence of local, state, and federal regulatory protection have developed over the years, water in the United States still contain chemical, microbiological, and other types of contaminants at detectable and at times harmful levels. This in addition to the growth of microbial pathogens that can resist traditional water treatment practices have led to the question: Where and how should the U.S. government focus its attention and limited resources to ensure safe drinking water supplies for the future? To deal with these issues the Safe Drinking Water Act (SDWA) Amendments of 1996 Safe included a request that the U.S. Environmental Protection Agency (EPA) publish a list of unregulated chemical and microbial contaminants and contaminant groups every five years that are or could pose risks in the drinking water of public water systems. The first list, called the Drinking Water Contaminant Candidate List (CCL), was published in March 1998. The main function of the CCL is to provide the basis for deciding whether to regulate at least five new contaminants from the CCL every five years. However, since additional research and monitoring need to be conducted for most of the contaminants on the 1998 CCL, the list is also used to prioritize these related activities. Classifying Drinking Water Contaminants for Regulatory Consideration is the third report by the Committee on Dinking Water Contaminants with the purpose of providing advice regarding the setting of priorities among drinking water contaminants in order to identify those contaminants that pose the greatest threats to public health. The committee is comprised of 14 volunteer experts in water treatment engineering, toxicology, public health, epidemiology, water and analytical chemistry, risk assessment, risk communication, public water system operations, and microbiology and is jointly overseen by the National Research Council's (NRC'S) Water Science and Technology Board and Board on Environmental Studies and Toxicology. In this report the committee needed to readdress its second report as well as explore the feasibility of developing and using mechanisms for identifying emerging microbial pathogens for research and regulatory activities. The promotion of public health remains the guiding principle of the committee's recommendations and conclusions in this report.

Download or read book Developing Norms for the Provision of Biological Laboratories in Low Resource Contexts written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2019-05-01 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: On June 27-28, 2018, the U.S. National Academies of Sciences, Engineering, and Medicine (the National Academies) convened an international workshop in Amsterdam, the Netherlands, on developing norms for the provision of laboratories in low-resource contexts. The U.S. Department of State's Biosecurity Engagement Program requested that the National Academies organize this workshop to engage an international group of organizations that provide funding for construction, upgrades, and maintenance of biological laboratories in countries without the means to build such labs themselves. Twenty-one people from 19 organizations participated. The intent was to advance the conversation about the identification and application of guiding principles and common norms for use by these organizations in their grants, partnerships, and aid. This publication summarizes the presentations and discussions from the workshop.

Download or read book Drinking Water Contaminant Candidate List written by and published by . This book was released on 1998 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Medical Biosensors for Point of Care POC Applications written by Roger Narayan and published by Woodhead Publishing. This book was released on 2016-08-21 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Medical Biosensors for Point of Care (POC) Applications discusses advances in this important and emerging field which has the potential to transform patient diagnosis and care. Part 1 covers the fundamentals of medical biosensors for point-of-care applications. Chapters in part 2 go on to look at materials and fabrication of medical biosensors while the next part looks at different technologies and operational techniques. The final set of chapters provide an overview of the current applications of this technology. Traditionally medical diagnostics have been dependent on sophisticated technologies which only trained professionals were able to operate. Recent research has focused on creating point-of-care diagnostic tools. These biosensors are miniaturised, portable, and are designed to be used at the point-of-care by untrained individuals, providing real-time and remote health monitoring. Provides essential knowledge for designers and manufacturers of biosensors for point-of-care applications Provides comprehensive coverage of the fundamentals, materials, technologies, and applications of medical biosensors for point-of-care applications Includes contributions from leading international researchers with extensive experience in developing medical biosensors Discusses advances in this important and emerging field which has the potential to transform patient diagnosis and care

Download or read book Laboratory Quality Management System written by World Health Organization and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Achieving, maintaining and improving accuracy, timeliness and reliability are major challenges for health laboratories. Countries worldwide committed themselves to build national capacities for the detection of, and response to, public health events of international concern when they decided to engage in the International Health Regulations implementation process. Only sound management of quality in health laboratories will enable countries to produce test results that the international community will trust in cases of international emergency. This handbook was developed through collaboration between the WHO Lyon Office for National Epidemic Preparedness and Response, the United States of America Centers for Disease Control and Prevention (CDC) Division of Laboratory Systems, and the Clinical and Laboratory Standards Institute (CLSI). It is based on training sessions and modules provided by the CDC and WHO in more than 25 countries, and on guidelines for implementation of ISO 15189 in diagnostic laboratories, developed by CLSI. This handbook is intended to provide a comprehensive reference on Laboratory Quality Management System for all stakeholders in health laboratory processes, from management, to administration, to bench-work laboratorians. This handbook covers topics that are essential for quality management of a public health or clinical laboratory. They are based on both ISO 15189 and CLSI GP26-A3 documents. Each topic is discussed in a separate chapter. The chapters follow the framework developed by CLSI and are organized as the "12 Quality System Essentials".