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. 2017 Jun 13;8:1077. doi: 10.3389/fmicb.2017.01077

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Copyright © 2017 Park, Lee, Yeo, Shin and Holzapfel.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Influence of AI-2 on growth of E. coli wild-type strain (ATCC 43894) and the luxS-deficient mutant strain under osmotic stress. EHEC wild-type (WT), luxS-deficient mutant (MT), and the mutant with 3 μM (as final concentration) of AI-2 (MT + AI-2) were cultured for 10 h under 0.6M NaCl LB broth. The growth rates were measured from optical density 600 nm values (A). Individual cell length-to-width ratio (B) was measured and calculated from at least 90 representative objects. Error bars indicate the standard deviations. Significance is indicated (^∗p ≤ 0.05; ^∗∗p ≤ 0.01; ^∗∗∗p ≤ 0.001).