Preprints
https://doi.org/10.5194/essd-2021-440
https://doi.org/10.5194/essd-2021-440

  06 Jan 2022

06 Jan 2022

Review status: this preprint is currently under review for the journal ESSD.

Escherichia coli concentration, multiscale monitoring over the decade 2011–2021 in the Mekong basin, Lao PDR

Laurie Boithias1, Olivier Ribolzi1, Emma Rochelle-Newall2, Chanthanousone Thammahacksa3, Paty Nakhle1, Bounsamay Soulileuth3, Anne Pando-Bahuon3, Keooudone Latsachack3, Norbert Silvera3, Phabvilay Sounyafong3, Khampaseuth Xayyathip3, Rosalie Zimmermann4,5,6, Sayaphet Rattanavong4, Priscia Oliva1, Thomas Pommier7, Olivier Evrard8, Sylvain Huon2, Jean Causse9, Thierry Henry-Des-Tureaux3, Oloth Sengtaheuanghoung10, Nivong Sipaseuth10, and Alain Pierret3 Laurie Boithias et al.
  • 1Géosciences Environnement Toulouse (GET), Université de Toulouse, CNRS, IRD, UPS, Toulouse, France
  • 2Sorbonne Université, Univ. Paris Est Creteil, IRD, CNRS, INRAE, Institute of Ecology and Environmental Sciences of Paris (iEES-Paris), Paris, France
  • 3IRD, Department of Agricultural Land Management (DALaM), Vientiane, Lao PDR
  • 4Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao PDR
  • 5Department of Environmental Sciences, University of Basel, Basel, Switzerland
  • 6Department of Medical Microbiology and Infection Prevention, Amsterdam University Medical Centers (UMC), Amsterdam, The Netherlands
  • 7Laboratoire d’Ecologie Microbienne (LEM), CNRS, UCBL, VetAgroSup, Université de Lyon, Villeurbanne, France
  • 8Laboratoire des Sciences du Climat et de l’Environnement (LSCE/IPSL), CEA, CNRS, UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France
  • 9Société Transcender, Rennes, France/Ecole des Hautes Etudes en Santé Publique (EHESP), Laboratoire d’Etude et de Recherche en Environnement et Santé, IRSET-INSERM, Rennes, France
  • 10Ministry of Agriculture and Forestry (MAF), Department of Agricultural Land Management (DALaM), Vientiane, Lao PDR

Abstract. Bacterial pathogens in surface waters may threaten human health, especially in developing countries, where untreated surface water is often used for domestic needs. The objective of the long-term multiscale monitoring of Escherichia coli concentration in stream water, and that of associated variables (temperature, electrical conductance, dissolved oxygen concentration and saturation, pH, oxidation-reduction potential, turbidity, and total suspended sediment concentration), was to identify the drivers of bacterial dissemination across tropical catchments. This data description paper presents three datasets (see section Data availability) collected at 31 sampling stations located within the Mekong river and its tributaries in Lao PDR (0.6–25,946 km2) from 2011 to 2021. The 1,602 records have been used to describe the hydrological processes driving in-stream Escherichia coli concentration during flood events, to understand land-use impact on bacterial dissemination on small and large catchment scales, to relate stream water quality and diarrhea outbreaks, and to build numerical models. The database may be further used e.g. to interpret new variables measured in the monitored catchments, or to map the health risk posed by fecal pathogens.

Laurie Boithias et al.

Status: open (until 03 Mar 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2021-440', Anonymous Referee #1, 25 Jan 2022 reply

Laurie Boithias et al.

Data sets

Escherichia coli concentrations and physico-chemical measurements (2011-2021) at the outlet of the Houay Pano catchment, northern Lao PDR Ribolzi, O., Boithias, L., Thammahacksa, C., Rochelle-Newall, E., Pando-Bahuon, A., Silvera, N., Sengtaheuanghoung, O., Sipaseuth, N., Pierret, A. https://doi.org/10.23708/EWOYNK

Escherichia coli concentrations and physico-chemical measurements (2011-2021) at the outlet of six catchments of the Mekong river basin, northern Lao PDR Ribolzi, O., Boithias, L., Thammahacksa, C., Silvera, N., Pando‐Bahuon, A., Sengtaheuanghoung, O., Sipaseuth, N., Latsachack, K., Soulileuth, B., Sounyafong, P., Khampaseuth, X., Pierret, A. https://doi.org/10.23708/1YZQHH

Escherichia coli concentrations and physico-chemical measurements at the outlet of 29 catchments of the Mekong river basin, Lao PDR, during dry and rainy seasons (2016) Ribolzi, O., Zimmermann, R., Thammahacksa, C., Rattanavong, S., Oliva, P., Sengtaheuanghoung, O., Pierret, A. https://doi.org/10.23708/ZRSBM4

Laurie Boithias et al.

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Short summary
Fecal pathogens in surface waters may threaten human health, especially in developing countries. The Escherichia coli database is organized in three datasets, and includes 1,602 records from 31 sampling stations located within the Mekong river basin in Lao PDR. Data have been used to identify the drivers of Escherichia coli dissemination across tropical catchments, including during floods. Data may be further used to interpret new variables or to map the health risk posed by fecal pathogens.