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Chen J, Lin Y, Zhu Y, Zhang Y, Qian Q, Chen C, Xie S. Spatiotemporal profiles and underlying mechanisms of the antibiotic resistome in two water-diversion lakes. ENVIRONMENTAL RESEARCH 2024; 263:120051. [PMID: 39322056 DOI: 10.1016/j.envres.2024.120051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2024] [Revised: 09/13/2024] [Accepted: 09/21/2024] [Indexed: 09/27/2024]
Abstract
Human-induced interventions have altered the local characteristics of the lake ecosystems through changes in hydraulic exchange, which in turn impacts the ecological processes of antibiotic resistance genes (ARGs) in the lakes. However, the current understanding of the spatiotemporal patterns and driving factors of ARGs in water-diversion lakes is still seriously insufficient. In the present study, we investigated antibiotic resistome in the main regulation and storage hubs, namely Nansi Lake and Dongping Lake, of the eastern part of the South-to-North Water Diversion project in Shandong Province (China) using a metagenomic-based approach. A total of 653 ARG subtypes belonging to 25 ARG types were detected with a total abundance of 0.125-0.390 copies/cell, with the dominance of bacitracin, multidrug, and macrolide-lincosamide streptogramin resistance genes. The ARG compositions were sensitive to seasonal variation and also interfered by artificial regulation structures along the way. Human pathogenic bacteria such as Acinetobacter calcoaceticus, Acinetobacter lwoffii, Klebsiella pneumoniae, along with the multidrug resistance genes they carried, were the focus of risk control in the two studied lakes, especially in summer. Plasmids were the key mobile genetic elements (MGEs) driving the horizontal gene transfer of ARGs, especially multidrug and sulfonamide resistance genes. The null model revealed that stochastic process was the main driver of ecological drift for ARGs in the lakes. The partial least squares structural equation model further determined that seasonal changes of pH and temperature drove a shift in the bacterial community, which in turn shaped the profile of ARGs by altering the composition of MGEs, antibacterial biocide- and metal-resistance genes (BMGs), and virulence factor genes (VFGs). Our results highlighted the importance of seasonal factors in determining the water transfer period. These findings can aid in a deeper understanding of the spatiotemporal variations of ARGs in lakes and their driving factors, offering a scientific basis for antibiotic resistance management.
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Affiliation(s)
- Jianfei Chen
- Fujian Key Laboratory of Pollution Control & Resource Reuse, College of Environmental and Resource Sciences, Fujian Normal University, Fuzhou, 350007, China; State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
| | - Yiyong Lin
- Fujian Key Laboratory of Pollution Control & Resource Reuse, College of Environmental and Resource Sciences, Fujian Normal University, Fuzhou, 350007, China
| | - Ying Zhu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
| | - Yanru Zhang
- Fujian Key Laboratory of Pollution Control & Resource Reuse, College of Environmental and Resource Sciences, Fujian Normal University, Fuzhou, 350007, China
| | - Qinrong Qian
- Fujian Key Laboratory of Pollution Control & Resource Reuse, College of Environmental and Resource Sciences, Fujian Normal University, Fuzhou, 350007, China
| | - Chao Chen
- Research Institute for Environmental Innovation (Suzhou), Tsinghua, Suzhou, 215163, China; State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
| | - Shuguang Xie
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China.
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Sidhu JPS, Gupta VVSR, Stange C, Ho J, Harris N, Barry K, Gonzalez D, Van Nostrand JD, Zhou J, Page D, Tiehm A, Toze S. Prevalence of antibiotic resistance and virulence genes in the biofilms from an aquifer recharged with stormwater. WATER RESEARCH 2020; 185:116269. [PMID: 32798893 DOI: 10.1016/j.watres.2020.116269] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 07/29/2020] [Accepted: 08/03/2020] [Indexed: 06/11/2023]
Abstract
An improved understanding of the diversity and composition of microbial communities carrying antibiotic resistance genes (ARGs) and virulence genes (VGs) in aquifers recharged with stormwater is essential to comprehend potential human health risks from water reuse. A high-throughput functional gene array was used to study the prevalence of ARGs and VGs in aquifer biofilms (n = 27) taken from three boreholes over three months. Bacterial genera annotated as opportunistic pathogens such as Aeromonas, Burkholderia, Pseudomonas, Shewanella, and Vibrio were ubiquitous and abundant in all biofilms. Bacteria from clinically relevant genera, Campylobacter, Enterobacter, Klebsiella, Mycobacterium, Mycoplasma, and Salmonella were detected in biofilms. The mean travel time of stormwater from the injection well to P1 and P3 boreholes was 260 and 360 days respectively. The presence of ARGs and VGs in the biofilms from these boreholes suggest a high spatial movement of ARGs and VGs in the aquifer. The ARGs with the highest abundance were small multidrug resistance efflux pumps (SMR) and multidrug efflux (Mex) followed by β-lactamase C genes. β- lactamase C encoding genes were primarily detected in Enterobacteriaceae, Pseudomonadaceae, Bacillaceae, and Rhodobacteraceae families. The VGs encoding siderophores, including aerobactin (iro and iuc genes), followed by pilin, hemolysin, and type III secretion were ubiquitous. Canonical correspondence analysis suggested that Total Organic Carbon (TOC), Dissolved Organic Carbon (DOC), turbidity, and Fe concentration has a significant impact on the microbial community structure of bacteria carrying ARGs and VGs. Post abstraction treatment of groundwater may be prudent to improve water security and reduce potential health risks.
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Affiliation(s)
- J P S Sidhu
- CSIRO Oceans and Atmosphere, Ecoscience Precinct, 41 Boggo Road, Brisbane 4102, Australia.
| | - V V S R Gupta
- CSIRO Agriculture and Food, Locked Bag No. 2, Glen Osmond, SA 5064, Australia
| | - C Stange
- DVGW-Technologiezentrum Wasser (TZW), Karlsruher Street 84, D-76139 Karlsruhe, Germany
| | - J Ho
- DVGW-Technologiezentrum Wasser (TZW), Karlsruher Street 84, D-76139 Karlsruhe, Germany
| | - N Harris
- CSIRO Agriculture and Food, Locked Bag No. 2, Glen Osmond, SA 5064, Australia
| | - K Barry
- CSIRO Land and Water Private Bag 2, Glen Osmond, SA 5064, Australia
| | - D Gonzalez
- CSIRO Land and Water Private Bag 2, Glen Osmond, SA 5064, Australia
| | - J D Van Nostrand
- Institute of Environmental Genomics, University of Oklahoma, Norman, OK 73019, USA
| | - J Zhou
- Institute of Environmental Genomics, University of Oklahoma, Norman, OK 73019, USA
| | - D Page
- CSIRO Land and Water Private Bag 2, Glen Osmond, SA 5064, Australia
| | - A Tiehm
- DVGW-Technologiezentrum Wasser (TZW), Karlsruher Street 84, D-76139 Karlsruhe, Germany
| | - S Toze
- CSIRO Land and Water, Ecoscience Precinct, 41 Boggo Road, Brisbane 4102, Australia
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