Management of Legionella in Water Systems


Book Description

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.




EPA 815-R.


Book Description




Cryptosporidium and Cryptosporidiosis


Book Description

Cryptosporidiosis is a parasitic disease that strikes humans and domestic animals, ranging from isolated occurrences to epidemics. Infection caused by this parasite can lead to enteric disease and other debilitating conditions that can be life-threatening in immunocompromised animals and humans. Increased recognition of the seriousness of cryptosporidiosis has aroused the concern of public health, medical, veterinary, and research communities. Cryptosporidium and Cryptosporidiosis is the only text to specifically address this disease-its diagnosis, epidemiology, waterborne events, prevention and treatment, immunity, biochemistry, cultivation, laboratory animal models, and molecular biology. This book summarizes data on taxonomy, life cycles, morphology, host species, and control methods of cryptosporidiosis. It addresses the latest industry trends-developing disinfectants, medications, and water purification methods-and also academic trends-diagnostics, immune responses, biochemistry, and molecular biology research.




Some Drinking-water Disinfectants and Contaminants, Including Arsenic


Book Description

A working group of 23 experts from 13 countries met in Lyon to evaluate the evidence for carcinogenicity of arsenic (mostly naturally occurring) as a contaminant of drinking-water, and of the water-disinfectant chloramine. The working group also evaluated or re-evaluated four chlorination by-products found in drinking-water, namely chloral hydrate, di- and trichloroacetic acids, and 3-chloro-4-(dichloromethyl)-5-hydroxy-2(5H)-furanone (also known as MX). High-level exposure to arsenic in drinking-water occurs in some regions such as China, Latin America, Bangladesh and West Bengal. The Working Group reviewed epidemiological studies of human cancer (mainly ecological studies in Taiwan and Chile, and several case-control and cohort studies) in relation to arsenic in drinking-water. Arsenic in drinking-water (primarily inorganic, as arsenate and to a lesser extent arsenite) was evaluated as carcinogenic to humans (Group 1) on the basis of sufficient evidence for an increased risk for cancer of the urinary bladder, lung and skin. Studies on inorganic arsenic in experimental animals provided limited evidence for its carcinogenicity, but sufficient evidence was found in experimental animals for the carcinogenicity of dimethylarsinic acid (an organic form of arsenic), which produced urinary bladder tumours in rats and lung tumours in mice after oral administration.




Optimizing Chloramine Treatment


Book Description

This manual recommends optimal operational criteria for chloramine application to enhance and protect distribution system water quality. It examines the chemical characteristics of chloramines, documents the use of chloramines with case studies, and provides planning, design, startup, and monitoring strategies for optimizing the use of chloramines.




Quality Control in Fruit and Vegetable Processing


Book Description

Quality Control in Fruit and Vegetable Processing: Methods and Strategies illustrates the applications of various nonthermal technologies for improving the quality and safety of fruits and vegetables, such as microwave, ultrasound, gamma irradiation, pulsed light, and hurdle technology. The volume also looks at various strategies (osmotic dehydration, ultrasound- and ultrasound-assisted osmotic dehydration, nanoemulsions, and engineered nanomaterials) for the preservation of fresh produce. It emphasizes various nondestructive techniques that have been widely used for the quality assessment of fruits and vegetables during storage, including image analysis, x-ray tomography, magnetic resonance imaging (MRI), nonmagnetic resonance imaging (NMR), color vision system, near-infrared spectroscopy (NIRS), and computerized tomography (CT). Applications of other nondestructive mechanical (such as electronic tongue and nose technology) and dynamic methods (acoustic) for food quality and safety evaluation have also been included. The book concludes with an overview of the potential use of fruit and vegetable waste as a viable feedstock for bioenergy and for the treatment of wastewater. Key features: Promotes the utilization of new and novel nonthermal technologies for the preservation of fruits and vegetables Provide up-to-date information on the applications of nonthermal technologies for the quality and safety of fresh produce during storage Highlights different preservation strategies for improving the quality of fresh produce Explores the use of nondestructive quality assessment methods such as X-ray, MRI, NMR, etc. Discusses the potential industrial use of fruit and vegetable waste as a viable feedstock for bioenergy and for the treatment of industrial wastewater This volume will provide food for thought for those in the food industry on new methods and technology for effective quality control in fruit and vegetable processing.







Reviews of Environmental Contamination and Toxicology 191


Book Description

Reviews of Environmental Contamination and Toxicology provides concise, critical review articles of timely advances, philosophy and significant areas of accomplished or needed endeavor in the total field of xenobiotics, in any segment of the environment, as well as toxicological implications.




Disinfection, Sterilization, and Preservation


Book Description

This new edition is a comprehensive, practical reference on contemporary methods of disinfection, sterlization, and preservation and their medical, surgical, and public health applications. New topics covered include recently identified pathogens, microbial biofilms, use of antibiotics as antiseptics, synergism between chemical microbicides, pulsed-light sterilization of pharmaceuticals, and new methods for medical waste management. (Midwest).