1
|
Eliette AS, Elodie B, Arnaud M, Tiffany R, Aymé S, Pascal P. Idiosyncratic invasion trajectories of human bacterial pathogens facing temperature disturbances in soil microbial communities. Sci Rep 2024; 14:12375. [PMID: 38811807 PMCID: PMC11137084 DOI: 10.1038/s41598-024-63284-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 05/27/2024] [Indexed: 05/31/2024] Open
Abstract
Current knowledge about effects of disturbance on the fate of invaders in complex microbial ecosystems is still in its infancy. In order to investigate this issue, we compared the fate of Klebsiella pneumoniae (Kp) and Listeria monocytogenes (Lm) in soil microcosms. We then used environmental disturbances (freeze-thaw or heat cycles) to compare the fate of both invaders and manipulate soil microbial diversity. Population dynamics of the two pathogens was assessed over 50 days of invasion while microbial diversity was measured at times 0, 20 and 40 days. The outcome of invasion was strain-dependent and the response of the two invaders to disturbance differed. Resistance to Kp invasion was higher under the conditions where resident microbial diversity was the highest while a significant drop of diversity was linked to a higher persistence. In contrast, Lm faced stronger resistance to invasion in heat-treated microcosms where diversity was the lowest. Our results show that diversity is not a universal proxy of resistance to microbial invasion, indicating the need to properly assess other intrinsic properties of the invader, such as its metabolic repertoire, or the array of interactions between the invader and resident communities.
Collapse
Affiliation(s)
- Ascensio-Schultz Eliette
- Université de Bourgogne, University Bourgogne Franche-Comté, INRAE, Institut Agro, Agroécologie, 21000, Dijon, France
| | - Barbier Elodie
- Université de Bourgogne, University Bourgogne Franche-Comté, INRAE, Institut Agro, Agroécologie, 21000, Dijon, France
| | - Mounier Arnaud
- Université de Bourgogne, University Bourgogne Franche-Comté, INRAE, Institut Agro, Agroécologie, 21000, Dijon, France
| | - Raynaud Tiffany
- Université de Bourgogne, University Bourgogne Franche-Comté, INRAE, Institut Agro, Agroécologie, 21000, Dijon, France
| | - Spor Aymé
- Université de Bourgogne, University Bourgogne Franche-Comté, INRAE, Institut Agro, Agroécologie, 21000, Dijon, France
| | | |
Collapse
|
2
|
Koloti LE, Nkuna R, Matambo TS. Impact of current anthropogenic activities on Blesbokspruit wetland microbiome and functions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 915:170010. [PMID: 38219994 DOI: 10.1016/j.scitotenv.2024.170010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 01/03/2024] [Accepted: 01/06/2024] [Indexed: 01/16/2024]
Abstract
Till present, natural wetlands have been continuously subjected to intensive pollution stress in recent years, mainly because of the rapidly growing industrialization and urbanization that are associated with a myriad of anthropogenic activities and land use practices. These man-made sources of pollution change the chemical properties of the natural wetlands, which in turn alter their microbial ecological biodiversity and functions. For the first time, the impact of the current anthropogenic activities and land use practices on the Blesbokspruit wetland chemical status and their consequential effect on the microbial structure and functions were investigated. Sites of high pollution intensity were identified using geographic information systems mapping (GISMapping) and the wetland microbiome and functional profile were studied through the use of high throughput shotgun metagenomics sequencing analysis. The predominant phyla that stemmed along the Blesbokspruit wetland were found to be Proteobacteria which was more dominant in water (93 %) than in the sediments (89 %), followed by firmicutes which was more abundant in sediments (9 %) than in water (6 %), and Bacteroidetes were relatively low in abundance within both the sediments (2 %) and the overlying water (1 %). The genera Klebsiella (70.4 %-28.2 %), Citrobacter (52.0 %-30.6 %), Escherichia (51.0 %-8.4 %), and Lynsinibacillus (9.3 %-1.5 %) were observed in most water and sediment samples. Within the six polluted sites, Site 2 was found to be the most highly polluted site in the Blesbokspruit wetland with very high COD (900 mg/L), TOC (11.60 mg/L), NO3- (39.74 mg/L), NO2- (12.64 mg/L), PO43 (4.14 mg/L), Fl- (143.88 mg/L), Cl- (145.95 mg/L) concentrations recorded in the water and high levels of TOC (0.37 mg/L), TC (6.92 %), TN (1.82 %), TS (0.53 %) in sediments. The microbial community structure and functions were found to be strongly influenced by the high organic content from the intense agricultural activities and sewage spillages and heavy metals from the mining activities nearby.
Collapse
Affiliation(s)
- Lebohang E Koloti
- Institute for the Development of Energy for African Sustainability (IDEAS), University of South Africa, Christiaan De Wet/Pioneer, P.O. Box X6, FL 1710, South Africa
| | - Rosina Nkuna
- Institute for the Development of Energy for African Sustainability (IDEAS), University of South Africa, Christiaan De Wet/Pioneer, P.O. Box X6, FL 1710, South Africa
| | - Tonderayi S Matambo
- Institute for the Development of Energy for African Sustainability (IDEAS), University of South Africa, Christiaan De Wet/Pioneer, P.O. Box X6, FL 1710, South Africa; Centre of Competence in Environmental Biotechnology, College of Agriculture and Environmental Sciences, University of South Africa, Christiaan De Wet/Pioneer, P.O. Box X6, FL 1710, South Africa.
| |
Collapse
|
3
|
Ndlovu T, Kgosietsile L, Motshwarakgole P, Ndlovu SI. Evaluation of Potential Factors Influencing the Dissemination of Multidrug-Resistant Klebsiella pneumoniae and Alternative Treatment Strategies. Trop Med Infect Dis 2023; 8:381. [PMID: 37624319 PMCID: PMC10459473 DOI: 10.3390/tropicalmed8080381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/07/2023] [Accepted: 07/10/2023] [Indexed: 08/26/2023] Open
Abstract
The increasing reports of multidrug-resistant Klebsiella pneumoniae have emerged as a public health concern, raising questions about the potential routes for the evolution and dissemination of the pathogenic K. pneumoniae into environmental reservoirs. Potential drivers of the increased incidence of antimicrobial-resistant environmental K. pneumoniae include the eminent global climatic variations as a direct or indirect effect of human activities. The ability of microorganisms to adapt and grow at an exponential rate facilitates the distribution of environmental strains with acquired resistant mutations into water systems, vegetation, and soil which are major intersection points with animals and humans. The bacterial pathogen, K. pneumoniae, is one of the critical-priority pathogens listed by the World Health Organization, mostly associated with hospital-acquired infections. However, the increasing prevalence of pathogenic environmental strains with similar characteristics to clinical-antibiotic-resistant K. pneumoniae isolates is concerning. Considering the eminent impact of global climatic variations in the spread and dissemination of multidrug-resistant bacteria, in this review, we closely assess factors influencing the dissemination of this pathogen resulting in increased interaction with the environment, human beings, and animals. We also look at the recent developments in rapid detection techniques as part of the response measures to improve surveillance and preparedness for potential outbreaks. Furthermore, we discuss alternative treatment strategies that include secondary metabolites such as biosurfactants and plant extracts with high antimicrobial properties.
Collapse
Affiliation(s)
- Thando Ndlovu
- Department of Biological Sciences, Faculty of Science, University of Botswana, Private Bag UB, Gaborone 0022, Botswana; (L.K.); (P.M.)
| | - Lebang Kgosietsile
- Department of Biological Sciences, Faculty of Science, University of Botswana, Private Bag UB, Gaborone 0022, Botswana; (L.K.); (P.M.)
| | - Pako Motshwarakgole
- Department of Biological Sciences, Faculty of Science, University of Botswana, Private Bag UB, Gaborone 0022, Botswana; (L.K.); (P.M.)
| | - Sizwe I. Ndlovu
- Department of Biotechnology and Food Technology, Doornfontein Campus, University of Johannesburg, Johannesburg 2028, South Africa;
| |
Collapse
|
4
|
Byrne RL, Cocker D, Alyayyoussi G, Mphasa M, Charles M, Mandula T, Williams CT, Rigby J, Hearn J, Feasey N, Adams ER, Edwards T. A novel, magnetic bead-based extraction method for the isolation of antimicrobial resistance genes with a case study in river water in Malawi. J Appl Microbiol 2022; 133:3191-3200. [PMID: 35946113 PMCID: PMC9804433 DOI: 10.1111/jam.15755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 07/13/2022] [Accepted: 07/31/2022] [Indexed: 01/07/2023]
Abstract
AIMS The environment is increasingly recognized as an important reservoir of antimicrobial resistance genes (ARGs), which can be identified using molecular platforms. Yet, environmental surveillance remains an underutilised tool as there is no agreement on the best strategy for sample processing. We aim to develop a low-cost extraction method independent to commercial kits or reagents. METHODS AND RESULTS We present a novel, magnetic bead-based method for the isolation of ARGs from river water named MagnaExtract. We present this with analytic limit of detection as well as a case study in Southern Malawi. Here we compare the DNA yield from MagnaExtract with commercially available QIAGEN kits and the crude boil and spin method, using a high-resolution melt analysis PCR panel designed for the detection of third-generation cephalosporin and carbapenem-resistant genes from 98 water samples. CONCLUSION The MagnaExtract method is comparable, and in some instance's superior to commercially available kits for the isolation of ARGs from river water samples. SIGNIFICANCE AND IMPACT OF THE STUDY The MagnaExtract approach offers a simple, affordable, high yielding extraction method that could be used for the detection of ARGs from river water samples in surveillance campaigns in East Africa.
Collapse
Affiliation(s)
- Rachel L. Byrne
- Centre for Drugs and DiagnosticsLiverpool School of Tropical MedicineLiverpoolUK
| | - Derek Cocker
- Malawi Liverpool Wellcome TrustBlantyreMalawi,Clinical SciencesLiverpool School of Tropical MedicineLiverpoolUK
| | - Ghaith Alyayyoussi
- Centre for Drugs and DiagnosticsLiverpool School of Tropical MedicineLiverpoolUK
| | | | | | | | | | - Jonathan Rigby
- Malawi Liverpool Wellcome TrustBlantyreMalawi,Clinical SciencesLiverpool School of Tropical MedicineLiverpoolUK
| | - Jack Hearn
- Vector BiologyLiverpool School of Tropical MedicineLiverpoolUK
| | - Nicholas Feasey
- Malawi Liverpool Wellcome TrustBlantyreMalawi,Clinical SciencesLiverpool School of Tropical MedicineLiverpoolUK
| | - Emily R. Adams
- Centre for Drugs and DiagnosticsLiverpool School of Tropical MedicineLiverpoolUK
| | - Thomas Edwards
- Centre for Drugs and DiagnosticsLiverpool School of Tropical MedicineLiverpoolUK
| |
Collapse
|
5
|
Henriot CP, Martak D, Genet S, Bornette G, Hocquet D. Origin, fluxes, and reservoirs of Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa in aquatic ecosystems of a French floodplain. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 834:155353. [PMID: 35460768 DOI: 10.1016/j.scitotenv.2022.155353] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 04/12/2022] [Accepted: 04/13/2022] [Indexed: 06/14/2023]
Abstract
The release and spread of opportunistic pathogens - some of which are resistant to antibiotics - in the environment is a major public health challenge worldwide. In this study, we found evidence of the origin of such microorganisms and characterized their dispersal and survival in floodplain ecosystems to understand their fate in the environment. We determined the concentrations of Escherichia coli, extended-spectrum β-lactamases (ESBL)-producing E. coli, Klebsiella pneumoniae, ESBL-producing K. pneumoniae, and Pseudomonas aeruginosa in a floodplain of Eastern France using a culture-based method. Furthermore, we assessed the population structure of E. coli isolates by quadruplex PCR, their plasmid replicon content by PCR-based replicon typing, and the nature of their blaESBL genes by PCR and sequencing. The main aquatic ecosystems of the floodplain (river, tributaries, riverine wetlands, and groundwater) were sampled monthly over a one-year cycle. The majority of E. coli isolates retrieved in the studied floodplain were likely of human origin. Moreover, contamination of floodplain aquatic ecosystems by opportunistic pathogens mainly resulted from hydrological fluxes during high-flow periods, suggesting that dispersal and dilution predominated. During low-flow periods, E. coli may be able to survive for several months in isolated ecosystems in which it may find favourable conditions to thrive. The most nutrient-rich and isolated wetlands are consequently potential pathogen reservoirs. The production of ESBL was not a disadvantage for E. coli in low-anthropized floodplain ecosystems.
Collapse
Affiliation(s)
- Charles P Henriot
- UMR CNRS 6249 Chrono-environnement, Université de Bourgogne Franche-Comté, 16 Route de Gray, 25030 Besançon, France.
| | - Daniel Martak
- UMR CNRS 6249 Chrono-environnement, Université de Bourgogne Franche-Comté, 16 Route de Gray, 25030 Besançon, France; Hygiène Hospitalière, Centre Hospitalier Universitaire de Besançon, 3 boulevard Fleming, 25030 Besançon, France
| | - Salomé Genet
- UMR CNRS 6249 Chrono-environnement, Université de Bourgogne Franche-Comté, 16 Route de Gray, 25030 Besançon, France
| | - Gudrun Bornette
- UMR CNRS 6249 Chrono-environnement, Université de Bourgogne Franche-Comté, 16 Route de Gray, 25030 Besançon, France
| | - Didier Hocquet
- UMR CNRS 6249 Chrono-environnement, Université de Bourgogne Franche-Comté, 16 Route de Gray, 25030 Besançon, France; Hygiène Hospitalière, Centre Hospitalier Universitaire de Besançon, 3 boulevard Fleming, 25030 Besançon, France; Centre de Ressources Biologiques Filière Microbiologie de Besançon, Centre Hospitalier Universitaire, 3 boulevard Fleming, 25030 Besançon, France
| |
Collapse
|
6
|
Haenni M, Dagot C, Chesneau O, Bibbal D, Labanowski J, Vialette M, Bouchard D, Martin-Laurent F, Calsat L, Nazaret S, Petit F, Pourcher AM, Togola A, Bachelot M, Topp E, Hocquet D. Environmental contamination in a high-income country (France) by antibiotics, antibiotic-resistant bacteria, and antibiotic resistance genes: Status and possible causes. ENVIRONMENT INTERNATIONAL 2022; 159:107047. [PMID: 34923370 DOI: 10.1016/j.envint.2021.107047] [Citation(s) in RCA: 62] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/09/2021] [Accepted: 12/11/2021] [Indexed: 06/14/2023]
Abstract
Antimicrobial resistance (AMR) is a major global public health concern, shared by a large number of human and animal health actors. Within the framework of a One Health approach, actions should be implemented in the environmental realm, as well as the human and animal realms. The Government of France commissioned a report to provide policy and decision makers with an evidential basis for recommending or taking future actions to mitigate AMR in the environment. We first examined the mechanisms that underlie the emergence and persistence of antimicrobial resistance in the environment. This report drew up an inventory of the contamination of aquatic and terrestrial environments by AMR and antibiotics, anticipating that the findings will be representative of some other high-income countries. Effluents of wastewater treatment plants were identified as the major source of contamination on French territory, with spreading of organic waste products as a more diffuse and incidental contamination of aquatic environments. A limitation of this review is the heterogeneity of available data in space and time, as well as the lack of data for certain sources. Comparing the French Measured Environmental Concentrations (MECs) with predicted no effect concentrations (PNECs), fluoroquinolones and trimethoprim were identified as representing high and medium risk of favoring the selection of resistant bacteria in treated wastewater and in the most contaminated rivers. All other antibiotic molecules analyzed (erythromycin, clarithromycin, azithromycin, tetracycline) were at low risk of resistance selection in those environments. However, the heterogeneity of the data available impairs their full exploitation. Consequently, we listed indicators to survey AMR and antibiotics in the environment and recommended the harmonization of sampling strategies and endpoints for analyses. Finally, the objectives and methods used for the present work could comprise a useful example for how national authorities of countries sharing common socio-geographic characteristics with France could seek to better understand and define the environmental dimension of AMR in their particular settings.
Collapse
Affiliation(s)
- Marisa Haenni
- Unité Antibiorésistance et Virulence Bactériennes, ANSES (French Agency for Food, Environmental and Occupational Health & Safety) - Université de Lyon, Lyon, France
| | - Christophe Dagot
- Université of Limoges, RESINFIT, UMR INSERM 1092, CHU, F-87000 Limoges, France
| | - Olivier Chesneau
- Collection de l'Institut Pasteur (CIP), Microbiology Department, Institut Pasteur, Paris, France
| | - Delphine Bibbal
- INTHERES, Université de Toulouse, INRAE, ENVT, Toulouse, France
| | - Jérôme Labanowski
- Université de Poitiers, UMR CNRS 7285 IC2MP, ENSI Poitiers, Poitiers, France
| | | | - Damien Bouchard
- National Agency for Veterinary Medicinal Products, ANSES, Fougères, France
| | | | - Louisiane Calsat
- Risk Assessment Department (DER), ANSES (French Agency for Food, Environmental and Occupational Health & Safety), Maisons-Alfort, France
| | - Sylvie Nazaret
- Université de Lyon, Université Claude Bernard Lyon 1, UMR CNRS 5557, UMR INRAE 1418, VetAgro Sup, Ecologie Microbienne, F-69622 Villeurbanne, France
| | - Fabienne Petit
- UNIROUEN, UNICAEN, CNRS, M2C, Normandie Université Rouen, France; Sorbonne Université, CNRS, EPHE, PSL, UMR METIS, Paris F-75005, France
| | | | | | - Morgane Bachelot
- ANSES (French Agency for Food, Environmental and Occupational Health & Safety), Maisons-Alfort, France
| | - Edward Topp
- Agriculture and Agri-Food Canada, and University of Western Ontario, London, ON, Canada
| | - Didier Hocquet
- UMR Chronoenvironnement CNRS 6249, Université de Bourgogne Franche-Comté, Besançon, France; Hygiène Hospitalière, Centre Hospitalier Universitaire, 25030 Besançon, France.
| |
Collapse
|
7
|
Martak D, Henriot CP, Broussier M, Couchoud C, Valot B, Richard M, Couchot J, Bornette G, Hocquet D, Bertrand X. High Prevalence of Human-Associated Escherichia coli in Wetlands Located in Eastern France. Front Microbiol 2020; 11:552566. [PMID: 33013784 PMCID: PMC7498643 DOI: 10.3389/fmicb.2020.552566] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 08/18/2020] [Indexed: 02/03/2023] Open
Abstract
Escherichia coli that are present in the rivers are mostly brought by human and animal feces. Contamination occurs mostly through wastewater treatment plant (WWTP) outflows and field amendment with sewage sludge or manure. However, the survival of these isolates in river-associated wetlands remains unknown. Here, we assessed E. coli population structure in low-anthropized wetlands located along three floodplains to identify the major source of contamination of wetlands, whose functioning is different from the rivers. We retrieved 179 E. coli in water samples collected monthly from 19 sites located in eastern France over 1 year. Phylogroups B1 and B2 were dominant in the E. coli population, while phylogroup A was dominant in isolates resistant to third-generation cephalosporins, which harbored the extended-spectrum β-lactamase (ESBL) encoding genes blaCTX–M–15 and blaCTX–M–27 in half of the cases. The high proportion of isolates from human source can be attributed to WWTP outflows and the spread of sewage sludge. We analyzed the distribution of the isolates belonging to the most human-associated phylogroups (B2 and D) on a phylogenetic tree of the whole species and compared it with that of isolates retrieved from patients and from WWTP outflows. The distribution of the three E. coli populations was similar, suggesting the absence of a specific population in the environment. Our results suggest that a high proportion of E. coli isolates that reach and survive in low-anthropized environments such as wetlands are from human source. To the best of our knowledge, this is the first study assessing E. coli contamination and resistance genes in natural freshwater wetlands.
Collapse
Affiliation(s)
- Daniel Martak
- Service d'Hygiène Hospitalière, Centre Hospitalier Universitaire, Besançon, France.,UMR 6249, Laboratoire Chrono-Environnement, CNRS-Université de Bourgogne Franche-Comté, Besançon, France
| | - Charles P Henriot
- UMR 6249, Laboratoire Chrono-Environnement, CNRS-Université de Bourgogne Franche-Comté, Besançon, France
| | - Marion Broussier
- Service d'Hygiène Hospitalière, Centre Hospitalier Universitaire, Besançon, France
| | - Charlotte Couchoud
- Service d'Hygiène Hospitalière, Centre Hospitalier Universitaire, Besançon, France.,UMR 6249, Laboratoire Chrono-Environnement, CNRS-Université de Bourgogne Franche-Comté, Besançon, France
| | - Benoit Valot
- UMR 6249, Laboratoire Chrono-Environnement, CNRS-Université de Bourgogne Franche-Comté, Besançon, France.,Bioinformatique et big data au service de la santé, UFR Santé, Université de Bourgogne Franche-Comté, Besançon, France
| | - Marion Richard
- Service d'Hygiène Hospitalière, Centre Hospitalier Universitaire, Besançon, France
| | - Julie Couchot
- Service d'Hygiène Hospitalière, Centre Hospitalier Universitaire, Besançon, France
| | - Gudrun Bornette
- UMR 6249, Laboratoire Chrono-Environnement, CNRS-Université de Bourgogne Franche-Comté, Besançon, France
| | - Didier Hocquet
- Service d'Hygiène Hospitalière, Centre Hospitalier Universitaire, Besançon, France.,UMR 6249, Laboratoire Chrono-Environnement, CNRS-Université de Bourgogne Franche-Comté, Besançon, France.,Bioinformatique et big data au service de la santé, UFR Santé, Université de Bourgogne Franche-Comté, Besançon, France
| | - Xavier Bertrand
- Service d'Hygiène Hospitalière, Centre Hospitalier Universitaire, Besançon, France.,UMR 6249, Laboratoire Chrono-Environnement, CNRS-Université de Bourgogne Franche-Comté, Besançon, France
| |
Collapse
|
8
|
Zhang T, Fukuda K, Topp E, Zhu YG, Smalla K, Tiedje JM, Larsson DGJ. Editorial: The Environmental Dimension of Antibiotic Resistance. FEMS Microbiol Ecol 2020; 96:5871492. [DOI: 10.1093/femsec/fiaa130] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 06/23/2020] [Indexed: 01/10/2023] Open
Affiliation(s)
- Tong Zhang
- Department of Civil Engineering, The University of Hong Kong, Hong Kong, China
| | - Keiji Fukuda
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Edward Topp
- Agriculture and Agri-Food Canada, Department of Biology, University of Western Ontario, London, Canada
| | - Yong-Guan Zhu
- Institute of Urban Environmenta, Chinese Academy of Science, Xiamen, China
| | - Kornelia Smalla
- Julius Kühn-Institut, Federal Research Centre for Cultivated Plants, Institute for Epidemiology and Pathogen Diagnostics, Braunschweig, Germany
| | - James M Tiedje
- The Center for Microbial Ecology, Michigan State University, East Lansing, Michigan, USA
| | - D G Joakim Larsson
- Department of Infectious Disease, Centre for Antibiotic Resistance Research, University of Gothenburg, Gothenburg, Sweden
| |
Collapse
|
9
|
Chiapponi E, Henriot CP, Bertrand X, Hocquet D, Bornette G. Using GFP-Tagged Escherichia coli to Investigate the Persistence of Fecal Bacteria in Vegetated Wetlands: An Experimental Approach. Antibiotics (Basel) 2020; 9:E335. [PMID: 32570743 PMCID: PMC7344453 DOI: 10.3390/antibiotics9060335] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 06/10/2020] [Accepted: 06/16/2020] [Indexed: 11/16/2022] Open
Abstract
The contamination of surface water by pathogenic bacteria of human origin is an important public health issue. Wetlands can be contaminated with fecal bacteria by water originating from different sources, such as wastewater treatment plants and agriculture. Escherichia coli is a commensal of the human gut flora and the major indication of fecal contamination in surface water. Little is known about the association between fecal bacteria and submerged macrophytes and how this may influence the water quality. We questioned whether macrophytes enhance or inhibit the bacterial growth in wetlands. For this purpose, we grew four different species of macrophytes (Mentha aquatica, Baldellia ranunculoides, Sparganium emersum and Elodea canadensis, in mono- or multispecies cultures) in aquatic rhizotrons and inoculated the devices with a fluorescent strain of Escherichia coli (producing a green fluorescent protein) to simulate the fecal contamination of wetlands. Bacterial survival was monitored by measuring the fluorescence for 19 days. We found (i) that contaminated sediments did not release E. coli in the water column in lentic conditions and (ii) that monocultures of E. canadensis, M. aquatica and S. emersum reduced the E. coli concentration in the water column. This suggests that aquatic plant species may be used in constructed wetlands to clear surface freshwater from bacteria of fecal origin.
Collapse
Affiliation(s)
- Emilia Chiapponi
- BIGEA–Biological, Geological and Environmental Sciences, Via S. Alberto 163, Ravenna Campus, University of Bologna, 40126 Bologna, Italy
- UMR 6249, Laboratoire Chrono-Environnement, CNRS-Université de Bourgogne Franche-Comté, 25030 Besançon, France; (X.B.); (D.H.); (G.B.)
| | - Charles P. Henriot
- UMR 6249, Laboratoire Chrono-Environnement, CNRS-Université de Bourgogne Franche-Comté, 25030 Besançon, France; (X.B.); (D.H.); (G.B.)
| | - Xavier Bertrand
- UMR 6249, Laboratoire Chrono-Environnement, CNRS-Université de Bourgogne Franche-Comté, 25030 Besançon, France; (X.B.); (D.H.); (G.B.)
- Hygiène Hospitalière, Centre Hospitalier Universitaire de Besançon, 3 Boulevard A. Fleming, 25030 Besançon, France
| | - Didier Hocquet
- UMR 6249, Laboratoire Chrono-Environnement, CNRS-Université de Bourgogne Franche-Comté, 25030 Besançon, France; (X.B.); (D.H.); (G.B.)
- Hygiène Hospitalière, Centre Hospitalier Universitaire de Besançon, 3 Boulevard A. Fleming, 25030 Besançon, France
| | - Gudrun Bornette
- UMR 6249, Laboratoire Chrono-Environnement, CNRS-Université de Bourgogne Franche-Comté, 25030 Besançon, France; (X.B.); (D.H.); (G.B.)
| |
Collapse
|