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. 2017 Jan 17;9:3. doi: 10.1186/s13099-016-0153-x

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Cocultures of V. cholerae with E. coli strains.CFU of V. cholerae El Tor strain N16961 (Sm^R) was enumerated in individual cultures (a) or in cocultures (1:1) with E. coli 40 (Ec40) or E. coli Nissle (EcN) (b) at different time points. At all time points, pH of the culture supernatants was measured (c). CFU of V. cholerae classical strain O395 (Sm^R) in mono- and co-cultures was similarly assayed and pH of the culture supernatants was measured (d)