| Relevance of nontoxigenic strains as surrogates for Escherichia coli O157:H7 in groundwater contamination potential: role of temperature and cell acclimation time. | |
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MedLine Citation:
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PMID: 17626433 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Nontoxigenic bacteria are commonly used as indicators for predicting the contamination potential of pathogens in natural or engineered aqueous environments. In this study, column transport experiments were used to examine the relevance of two nontoxigenic strains of Escherichia coli O157:H7 as potential surrogates for the well-known pathogen. Experiments conducted at 11 degrees C indicate that only one of the nontoxigenic strains may be an appropriate surrogate for predicting the migration potential of the pathogen at low solution ionic strengths. Results of various bacterial characterization methods indicate that differences in cell attachment could qualitatively, but convincingly, be related to differences in cell surface charge. Additional experiments conducted at 22 degrees C reveal the influence of temperature on bacterial cell surface charge and cell attachmentto sand. The role of cell acclimation time to an artificial groundwater solution is also examined, showing little change in the degree of cell attachment over a period of several weeks. |
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Authors:
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Felipe D Castro; Nathalie Tufenkji |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Environmental science & technology Volume: 41 ISSN: 0013-936X ISO Abbreviation: Environ. Sci. Technol. Publication Date: 2007 Jun |
Date Detail:
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Created Date: 2007-07-13 Completed Date: 2007-08-17 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: United States |
Other Details:
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Languages: eng Pagination: 4332-8 Citation Subset: IM |
Affiliation:
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Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 2B2, Canada. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acclimatization Bacterial Adhesion / physiology Escherichia coli O157 / growth & development*, isolation & purification, physiology Temperature* Water Microbiology* Water Movements |
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