Estimating the number of cases of acute gastrointestinal illness (AGI) associated with Canadian municipal drinking water systems

The estimated burden of endemic acute gastrointestinal illness (AGI) annually in Canada is 20·5 million cases. Approximately 4 million of these cases are domestically acquired and foodborne, yet the proportion of waterborne cases is unknown. A number of randomized controlled trials have been complet...

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Veröffentlicht in:Epidemiology and infection 2016-05, Vol.144 (7), p.1371-1385
Hauptverfasser: MURPHY, H. M., THOMAS, M. K., MEDEIROS, D. T., McFADYEN, S., PINTAR, K. D. M.
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container_title Epidemiology and infection
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creator MURPHY, H. M.
THOMAS, M. K.
MEDEIROS, D. T.
McFADYEN, S.
PINTAR, K. D. M.
description The estimated burden of endemic acute gastrointestinal illness (AGI) annually in Canada is 20·5 million cases. Approximately 4 million of these cases are domestically acquired and foodborne, yet the proportion of waterborne cases is unknown. A number of randomized controlled trials have been completed to estimate the influence of tap water from municipal drinking water plants on the burden of AGI. In Canada, 83% of the population (28 521 761 people) consumes tap water from municipal drinking water plants serving >1000 people. The drinking water-related AGI burden associated with the consumption of water from these systems in Canada is unknown. The objective of this research was to estimate the number of AGI cases attributable to consumption of drinking water from large municipal water supplies in Canada, using data from four household drinking water intervention trials. Canadian municipal water treatment systems were ranked into four categories based on source water type and quality, population size served, and treatment capability and barriers. The water treatment plants studied in the four household drinking water intervention trials were also ranked according to the aforementioned criteria, and the Canadian treatment plants were then scored against these criteria to develop four AGI risk groups. The proportion of illnesses attributed to distribution system events vs. source water quality/treatment failures was also estimated, to inform the focus of future intervention efforts. It is estimated that 334 966 cases (90% probability interval 183 006-501 026) of AGI per year are associated with the consumption of tap water from municipal systems that serve >1000 people in Canada. This study provides a framework for estimating the burden of waterborne illness at a national level and identifying existing knowledge gaps for future research and surveillance efforts, in Canada and abroad.
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The objective of this research was to estimate the number of AGI cases attributable to consumption of drinking water from large municipal water supplies in Canada, using data from four household drinking water intervention trials. Canadian municipal water treatment systems were ranked into four categories based on source water type and quality, population size served, and treatment capability and barriers. The water treatment plants studied in the four household drinking water intervention trials were also ranked according to the aforementioned criteria, and the Canadian treatment plants were then scored against these criteria to develop four AGI risk groups. The proportion of illnesses attributed to distribution system events vs. source water quality/treatment failures was also estimated, to inform the focus of future intervention efforts. 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identifier ISSN: 0950-2688
ispartof Epidemiology and infection, 2016-05, Vol.144 (7), p.1371-1385
issn 0950-2688
1469-4409
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source Jstor Complete Legacy; MEDLINE; PubMed Central
subjects Acute Disease
Canada - epidemiology
Drinking water
Drinking Water - microbiology
Drinking Water - parasitology
Drinking Water - virology
E coli
Estimates
Gastrointestinal diseases
Gastrointestinal Diseases - epidemiology
Gastrointestinal Diseases - microbiology
Gastrointestinal Diseases - parasitology
Gastrointestinal Diseases - virology
Gastrointestinal Infection
Groundwater
Humans
Illnesses
Models, Theoretical
Original Papers
Pathogens
Public health
Randomized Controlled Trials as Topic
Subscribers
Surface water
Water quality
Water Supply
Water treatment
title Estimating the number of cases of acute gastrointestinal illness (AGI) associated with Canadian municipal drinking water systems
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