Human exposure to endotoxins and fecal indicators originating from water features
| Autor: | de Man, H., Heederik, D. D J, Leenen, E. J T M, de Roda Husman, A. M., Spithoven, J. J G, van Knapen, F., LS IRAS EEPI GRA (Gezh.risico-analyse), LS IRAS EEPI Global changes, LS IRAS VPH VV (veterinaire volksgezh.), Risk Assessment of Toxic and Immunomodulatory Agents, IRAS RATIA-SIB, IRAS RATIA2 |
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| Přispěvatelé: | LS IRAS EEPI GRA (Gezh.risico-analyse), LS IRAS EEPI Global changes, LS IRAS VPH VV (veterinaire volksgezh.), Risk Assessment of Toxic and Immunomodulatory Agents, IRAS RATIA-SIB, IRAS RATIA2 |
| Rok vydání: | 2013 |
| Předmět: |
Pollution
Environmental Engineering media_common.quotation_subject Coronacrisis-Taverne Fresh Water Risk Assessment Exposure Endotoxin Escherichia coli Interactive water fountain Humans Water Pollutants Cities Waste Management and Disposal Respiratory health Feces Limulus Test Civil and Structural Engineering media_common Water Science and Technology Netherlands Aerosols Air Pollutants Ecological Modeling CELL DEBRIS Environmental Exposure Contamination Fecal coliform Endotoxins Ecological Modelling Logistic Models Human exposure Fecal indicator bacteria Environmental chemistry Environmental science Health risk Regression Analysis Water quality Environmental Monitoring |
| Zdroj: | Water Research, 51, 198. Elsevier |
| ISSN: | 1879-2448 0043-1354 |
| Popis: | Exposure to contaminated aerosols and water originating from water features may pose public health risks. Endotoxins in air and water and fecal bacteria in water of water features were measured as markers for exposure to microbial cell debris and enteric pathogens, respectively. Information was collected about wind direction, wind force, distance to the water feature, the height of the water feature and the tangibility of water spray. The mean concentration of endotoxins in air nearby and in water of 31 water features was 10 endotoxin units (EU)/m(3) (Geometric Mean (GM), range 0-85.5 EU/m(3) air) and 773 EU/mL (GM, range 9-18,170 EU/mL water), respectively. Such mean concentrations may be associated with respiratory health effects. The water quality of 26 of 88 water features was poor when compared to requirements for recreational water in the Bathing Water Directive 2006/7/EC. Concentrations greater than 1000 colony forming units (cfu) Escherichia coli per 100 mL and greater than 400 cfu intestinal enterococci per 100 mL increase the probability of acquiring gastrointestinal health complaints. Regression analyses showed that the endotoxin concentration in air was significantly influenced by the concentration of endotoxin in water, the distance to the water feature and the tangibility of water spray. Exposure to air and water near water features was shown to lead to exposure to endotoxins and fecal bacteria. The potential health risks resulting from such exposure to water features may be estimated by a quantitative microbial risk assessment (QMRA), however, such QMRA would require quantitative data on pathogen concentrations, exposure volumes and dose-response relationships. The present study provides estimates for aerosolisation ratios that can be used as input for QMRA to quantify exposure and to determine infection risks from exposure to water features. |
| Databáze: | OpenAIRE |
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