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- Title
Iron uptake is essential for Escherichia coli survival in drinking water.
- Authors
Grandjean, D.; Jorand, F.; Guilloteau, H.; Block, J.-C.
- Abstract
Aims: The aim of this study was to elucidate if the need for iron for Escherichia coli to remain cultivable in a poorly nutritive medium such as the drinking water uses the iron transport system via the siderophores. Methods and Results: Environmental strains of E. coli (isolated from a drinking water network), referenced strains of E. coli and mutants deficient in TonB, an essential protein for iron(III) acquisition, were incubated for 3 weeks at 25°C, in sterile drinking water with and without lepidocrocite ( γ-FeOOH), an insoluble iron corrosion product. Only cells with a functional iron transport system were able to survive throughout the weeks. Conclusions: The iron transport system via protein TonB plays an essential role on the survival of E. coli in a weakly nutritive medium like drinking water. Significance and Impacts of the Study: Iron is a key parameter involved in coliform persistence in drinking water distribution systems.
- Subjects
ESCHERICHIA coli; WATER use; IRON; DRINKING water; ESCHERICHIA
- Publication
Letters in Applied Microbiology, 2006, Vol 43, Issue 1, p111
- ISSN
0266-8254
- Publication type
Article
- DOI
10.1111/j.1472-765X.2006.01895.x