Identification of Environmental Factors Involved in Legionella Development
Journal Title: International Journal of Interdisciplinary and Multidisciplinary Studies (IJIMS) - Year 2014, Vol 2, Issue 2
Abstract
Legionella are aerobic, gram-negative bacteria which grow in natural aquatic environments. Only half of the cases are elucidated, partly due to the fact that environmental factors involved in Legionella development are not well characterized. The purpose of the study is to identify environmental factors involved in legionella development. Secondary data recorded from 2000 to 2011 of Rennes, France were used for this study. Descriptive analysis of free chlorine, pH, iron, water temperature, total hardness and conductivity were Logistic regression was done to correlate the legionella and physical chemical parameters. The mean value of free chlorine, pH, iron, water temperature, total hardness and conductivity were found high in legionella positive samples except nitrate. Total hardness of water (p<0.417), nitrate (p<0.449) and iron (p<0.645) were not correlated with the presence of legionella. Adjustment was done for nitrate, total hardness and iron using multivariate logistic regression but there was no correlation with legionella. Therefore, various environmental factors such as free chlorine, pH, water temperature and conductivity are associated with the presence of legionella.
Authors and Affiliations
Kshitij Karki, Pierre Le CANN
Keywords
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