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. 2021 Feb 10;11:3460. doi: 10.1038/s41598-021-82891-0

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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E. coli concentration with lower and upper 95% confidence limits ([E. coli], MPN 100 mL⁻¹) in sampled watersheds of (a) Mekong tributaries, (b) Nam Ngum river, and (c) Mekong river across Lao PDR. Bars filled with orange represent concentrations during March 2016 (dry season) and bars filled with blue represent concentrations during July 2016 (rainy season). Sampling stations are classified from northern to southern Lao PDR. Figures generated with RStudio (version 1.2.1335; http://www.r-project.org) and edited with Inkscape (version 0.92.4; https://inkscape.org).