Relationship between mineral content of domestic hot water and microbial contamination
| Autor: | Paola Borella, Montagna, M. T., Romano-Spica, V., Stampi, S., Stancanelli, G., Triassi, M., Marchesi, I., Bargellini, A., Neglia, R., Paglionico, N., Spilotros, G., Moscato, U., Casati, G., Legnani, P. P., Sacchetti, R., Ossi, C., Moro, M., Ribera, G. |
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| Rok vydání: | 2003 |
| Předmět: |
Water mineral content
microbial contamination Legionella spp Pseudomonas spp iron zinc copper manganese calcium magnesium Iron Legionella Water Supply Pseudomonas Magnesium Manganese Dose-Response Relationship Drug Temperature Water Trace Elements Zinc Regression Analysis Calcium Chlorine Water Microbiology |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 0946-672X |
| Popis: | The relationship between Legionella and Pseudomonas spp contamination and mineral content of domestic hot waters was investigated in a cross-sectional Italian survey. Pseudomonas spp contamination was associated with elevated Ca, but lower Fe and free chlorine content in the water. Waters with Cu concentrations50 microg/L prevented Legionella spp colonisation (OR = 0.14, 95% CI = 0.02-1.13), whereas the risk of legionellae occurrence increased in waters with Mn levels3 microg/L (OR = 2.37, 95% CI = 1.06-5.30). Furthermore, Mn was positively associated with the risk of colonisation by eterotrophic bacteria growing at either 22 and 36 degrees C. Legionella species and serogroups were differently distributed according to Cu and Mn concentrations, suggesting that Legionella strains may have a different sensibility/resistance to trace elements. A specific action of Cu as decontamination factor is suggested and the consideration of Mn as a risk indicator for bacterial colonisation and biofilm presence is proposed. |
| Databáze: | OpenAIRE |
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