water microbiology Articles
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Microbiological quality of bottled water brands sold in retail outlets in New Zealand
The microbiological quality of bottled water has been studied over the past 30 years as bottled water can contain pathogens. The aim of this study was to determine if retailed bottled water in New Zealand complied with the Australia and New Zealand Food Standards (ANZFS) Code (2002) and the New Zealand Microbiological Reference Criteria (1995). Thirty-eight domestic and imported bottled water ...
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Antagonism between clinical and environmental isolates of
Pseudomonas aeruginosa against coliformsWater is essential to life, yet many people worldwide do not have access to clean drinking water and suffer or die from preventable diseases caused by unsafe water. Microbiological water analysis is based on coliform bacteria, but these microorganisms can have their growth affected by others, such as Pseudomonas aeruginosa. A total of 60 isolates of P. aeruginosa was investigated in this study ...
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Waterborne Pathogens
Background Waterborne disease is a global burden of great magnitude. As stated by Water.org, the number of people worldwide without access to safe water is estimated to be nearly 1 billion with another 2.5 billion lacking improved sanitation (http://water.org/learn-about-the-water-crisis/billion/). Apart from causing a great number of deaths, the innumerable cases of sicknesses have a profound ...
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Mineral water: a microbiological approach
Total coliforms, Escherichia coli, Pseudomonas aeruginosa and high heterotrophic plate count were found in bottled mineral water. What may represent an important public health problem, because the presence of these microorganisms can be harmful to the health of the consumer, principally because some are opportunistic pathogens capable of causing infections in vulnerable individuals. Sales of ...
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Improved drinking water and diarrhoeal morbidity and mortality in developing countries: a critical review
Access to improved drinking water is widely advocated as an effective way to reduce diarrhoea-related morbidity and mortality, particularly in poorest areas of the world and in most vulnerable population segments like children. Initial focus on improved water at the source point has been replaced by an emphasis in promoting interventions to increase access to microbiologically improved drinking ...
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Characterization of bacterial diversity in drinking water by pyrosequencing
Controlling microbial contamination of drinking water is critical to public health. However, understanding of the microbial ecology of drinking water remains incomplete. Representing the first application of high-throughput sequencing in drinking water microbiology, the objective of this study is to evaluate pyrosequencing as a high-throughput technique for the characterization of bacterial ...
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Coupling microbiological testing and sanitary surveys in drinking water quality programs: results from Capiz Province, Philippines
Developing countries often struggle to conduct laboratory-based water quality testing programs due to a lack of financial and technical resources. However, inexpensive, accurate, field-based tests are being developed which have the potential to overcome this barrier. This paper provides the results of an initiative by the Provincial Health Office in Capiz, Philippines, to conduct a first-ever, ...
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Is drinking water from ‘improved sources’ really safe? A case study in the Logone valley (Chad-Cameroon)
Within a cooperation project coordinated by the Association for Rural Cooperation in Africa and Latin America (ACRA) Foundation, water supplies were sampled across the villages of the Logone valley (Chad-Cameroon) mostly from boreholes, open wells, rivers and lakes as well as from some piped water. Microbiological analyses and sanitary inspections were carried out at each source. The ...
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Potential applications of next generation DNA sequencing of 16S rRNA gene amplicons in microbial water quality monitoring
The applicability of next generation DNA sequencing (NGS) methods for water quality assessment has so far not been broadly investigated. This study set out to evaluate the potential of an NGS-based approach in a complex catchment with importance for drinking water abstraction. In this multi-compartment investigation, total bacterial communities in water, faeces, soil, and sediment samples ...
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Creation of innovative experimental prototypes to meet health safety challenges in thermal spas
It is essential to preserve the quality of natural mineral water from its origin to the points of use, so as to ensure sanitary safety for patients within the thermal spas. The complexity of water systems may lead to issues linked to microbiological and physico-chemical contaminations which are necessary to be solved in order to keep the installations in compliance with the regulations in ...
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An assessment of microbiological water quality of six water source categories in north-east Uganda
Target 7C of the Millennium Development Goals is to “halve, by 2015, the proportion of people without sustainable access to safe drinking water and basic sanitation”. However, the corresponding indicator measures the “proportion of population using an improved drinking water source”. This raises the question of whether “safe” and “improved” can be used interchangeably. This paper tests this ...
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Evaluation of multiple-locus variable-number tandem repeat analysis (MLVA) for genotyping of Escherichia coli isolated from Karaj River
Most microbiological water quality regulations rely upon the detection of indicators of fecal pollution, such as coliform bacteria, or more specifically Escherichia coli. In order to further understand the source, fate, and implications for water quality regulation, environmental E. coli isolates should be assessed genetically to observe various levels of genotypic diversity. Multiple-locus ...
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Safety of packaged water distribution limited by household recontamination in rural Cambodia
Packaged water treatment schemes represent a growing model for providing safer water in low-income settings, yet post-distribution recontamination of treated water may limit this approach. This study evaluates drinking water quality and household water handling practices in a floating village in Tonlé Sap Lake, Cambodia, through a pilot cross-sectional study of 108 households, ...
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Hydrogel floc nature and biogenic constituents of drinking water discolouration deposits
Loose deposits (LD) develop and accumulate in drinking water distribution systems' (DWDS) pipes and often lead to discolouration incidents, which are a major reason for customers' complaints. In addition, LD may accumulate contaminants, while discolouration may be accompanied by degradation of the water's microbiological quality. Along with iron oxides, organic compounds ...
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Online waste water monitoring system on golfcourse - Case Study
Validation of BACTcontrol as an online waste water Monitoring System and Microbiological Early Warning System. The presence of dangerous micro organisms in water used in food processing or surface water can be a real threat for human health. The constant monitoring and control of the presence of such dangerous pathogens is therefore of big importance. In a collaboration project between a ...
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Increased information on waterborne outbreaks through efficient notification system enforces actions towards safe drinking water
In 1997, a compulsory notification system for waterborne outbreaks was introduced in Finland. The main aim of this notification is to obtain immediate information on suspected waterborne outbreaks in order to restrict and manage the outbreak promptly. During the past ten years, there have been 67 waterborne outbreaks in Finland, mainly associated with small groundwater supplies or private wells. ...
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A compact point-of-use water purification cartridge for household use in developing countries
Simple, low-cost household interventions are known to be effective in lowering the incidence of waterborne diseases in developing countries. However, high costs along with operational and maintenance issues have prevented the successful adoption of these interventions among the affected communities. To address these limitations, a cost-effective, gravity-driven water purification cartridge has ...
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Online waste water monitoring system on golfcourse
Validation of BACTcontrol as an online waste water Monitoring System and Microbiological Early Warning System. The presence of dangerous micro organisms in water used in food processing or surface water can be a real threat for human health. The constant monitoring and control of the presence of such dangerous pathogens is therefore of big importance. In a collaboration project between a local ...
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Point-of-use chlorination of turbid water: results from a field study in Tanzania
Household-based chlorine disinfection is widely effective against waterborne bacteria and viruses, and may be among the most inexpensive and accessible options for household water treatment. The microbiological effectiveness of chlorine is limited, however, by turbidity. In Tanzania, there are no guidelines on water chlorination at household level, and limited data on whether dosing guidelines ...
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The effect of sodium thiosulfate dechlorination on fecal indicator bacteria enumeration: laboratory and field data
In microbiological water quality testing, sample dechlorination with sodium thiosulfate is recommended to ensure that results accurately reflect the water quality at sample collection. Nevertheless, monitoring institutions in low-resource settings do not always dechlorinate samples, and there is limited research describing how this practice impacts drinking water quality results. The effect ...
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