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Risk factors of Legionella occurrence in nursing homes hot-water systems
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نویسنده
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deloge m. ,oberti s. ,dhome n. ,zmirou-navier d. ,mathieu l.
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منبع
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journal of materials and environmental science - 2015 - دوره : 6 - شماره : 4 - صفحه:949 -956
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چکیده
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Legionella contamination was studied in 34 nursing homes hot-water systems. a critical points analysis was conducted in each home in order to evaluate risk factors for occurrence of legionella bacteria across four components of the water systems: cold water system feeding the hot-water production,hot-water production,hot-water distribution system and points-of-use. risk factors were scaled according to criticity levels (1 to 4) and related to the prevalence and intensity of legionella contamination. hot-water of the nursing homes was contaminated by culturable legionella (24.6%) and by legionella detected using the in situ hybridization (fish) technique (48.5%). logistic regressions showed that criticity levels of hot-water system were predictive of hot-water contamination by culturable legionella for two major components: hot-water production and hot-water distribution system
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کلیدواژه
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and to a lesser extent for the points-of-use component. These results also hold true for the points-of-use criticity levels according to Legionella bacteria detected by FISH. In conclusion
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آدرس
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biotechnologies and environment research team,faculté polydisciplinaire de taza, Morocco, anjou-recherche,chemin de la digue,bp 76, France, biotechnologies and environment research team,faculté polydisciplinaire de taza, Morocco, desp,faculté de médecine,9 avenue de la forêt de haye,bp 184, France, ephe,faculté de médecine,9 avenue de la forêt de haye,bp 184, France
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Authors
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