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Zhang ZX, Fan XY, Li X, Gao YX, Zhao JR. Effects of combined antibiotics on nitrification, bacteria and antibiotic resistance genes in activated sludge: Insights from legacy effect of antibiotics. J Environ Sci (China) 2023; 131:96-110. [PMID: 37225384 DOI: 10.1016/j.jes.2022.10.051] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/26/2022] [Accepted: 10/31/2022] [Indexed: 05/26/2023]
Abstract
The effect of combined antibiotics exposure on nitrogen removal, microbial community assembly and proliferation of antibiotics resistance genes (ARGs) is a hotspot in activated sludge system. However, it is unclear that how the historical antibiotic stress affects the subsequent responses of microbes and ARGs to combined antibiotics. In this study, the effects of combined sulfamethoxazole (SMX) and trimethoprim (TMP) pollution on activated sludge under legacy of SMX or TMP stress with different doses (0.005-30 mg/L) were investigated to clarify antibiotic legacy effects. Nitrification activity was inhibited under higher level of combined exposure but a high total nitrogen removal (∼70%) occurred. Based on the full-scale classification, the legacy effect of past antibiotic stress had a marked effect on community composition of conditionally abundant taxa (CAT) and conditionally rare or abundant taxa (CRAT). Rare taxa (RT) were the keystone taxa in the microbial network, and the responses of hub genera were also affected by the legacy of antibiotic stress. Nitrifying bacteria and genes were inhibited by the antibiotics and aerobic denitrifying bacteria (Pseudomonas, Thaurea and Hydrogenophaga) were enriched under legacy of high dose, as were the key denitrifying genes (napA, nirK and norB). Furthermore, the occurrences and co-selection relationship of 94 ARGs were affected by legacy effect. While, some shared hosts (eg., Citrobacter) and hub ARGs (eg., mdtD, mdtE and acrD) were identified. Overall, antibiotic legacy could affect responses of activated sludge to combined antibiotic and the legacy effect was stronger at higher exposure levels.
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Affiliation(s)
- Zhong-Xing Zhang
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, China
| | - Xiao-Yan Fan
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, China.
| | - Xing Li
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, China
| | - Yu-Xi Gao
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, China
| | - Jun-Ru Zhao
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, China
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Ding D, Wang B, Zhang X, Zhang J, Zhang H, Liu X, Gao Z, Yu Z. The spread of antibiotic resistance to humans and potential protection strategies. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 254:114734. [PMID: 36950985 DOI: 10.1016/j.ecoenv.2023.114734] [Citation(s) in RCA: 25] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 02/26/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
Antibiotic resistance is currently one of the greatest threats to human health. Widespread use and residues of antibiotics in humans, animals, and the environment can exert selective pressure on antibiotic resistance bacteria (ARB) and antibiotic resistance gene (ARG), accelerating the flow of antibiotic resistance. As ARG spreads to the population, the burden of antibiotic resistance in humans increases, which may have potential health effects on people. Therefore, it is critical to mitigate the spread of antibiotic resistance to humans and reduce the load of antibiotic resistance in humans. This review briefly described the information of global antibiotic consumption information and national action plans (NAPs) to combat antibiotic resistance and provided a set of feasible control strategies for the transmission of ARB and ARG to humans in three areas including (a) Reducing the colonization capacity of exogenous ARB, (b) Enhancing human colonization resistance and mitigating the horizontal gene transfer (HGT) of ARG, (c) Reversing ARB antibiotic resistance. With the hope of achieving interdisciplinary one-health prevention and control of bacterial resistance.
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Affiliation(s)
- Dong Ding
- The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China; College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Bin Wang
- College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Xiaoan Zhang
- The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Junxi Zhang
- NHC Key Laboratory of Birth Defects Prevention & Henan Key Laboratory of Population Defects Prevention, Zhengzhou, China
| | - Huanhuan Zhang
- College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Xinxin Liu
- College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Zhan Gao
- The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
| | - Zengli Yu
- College of Public Health, Zhengzhou University, Zhengzhou, China; The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
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Corno G, Ghaly T, Sabatino R, Eckert EM, Galafassi S, Gillings MR, Di Cesare A. Class 1 integron and related antimicrobial resistance gene dynamics along a complex freshwater system affected by different anthropogenic pressures. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 316:120601. [PMID: 36351483 DOI: 10.1016/j.envpol.2022.120601] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 10/10/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
The risk for human health posed by polluted aquatic environments, and especially those carrying antibiotic resistance genes (ARGs) of clinical interest, is still debated. This is because of our limited knowledge of the dynamics of antimicrobial resistance in the environment, the selection mechanisms underlying the spread of ARGs, and the ecological factors potentially favoring their return to humans. The Class 1 integron is one of the most effective platforms for the dissemination of ARGs. In this study we investigated a freshwater system consisting of a lake-river-lake continuum, determining the abundance of class 1 integrons and their associated ARGs by a modulated metagenomic approach. Bacterial abundance and community composition were used to identify the potential carriers of class 1 integrons and their associated ARGs over a period of six months. Class 1 integrons and their ARG cargoes were significantly more abundant in riverine sampling sites receiving treated wastewater. Further, class 1 integrons carried ARGs ranked at the highest risk for human health (e.g., catB genes), in particular, genes encoding resistance to aminoglycosides. Genera of potential pathogens, such as Pseudomonas and Escherichia-Shigella, were correlated with class 1 integrons. The lake-river-lake system demonstrated a clear relationship between the integrase gene of class 1 integrons (intI1) and anthropogenic impact, but also a strong environmental filtering that favored the elimination of intI1 once the human derived stressors were reduced. Overall, the results of this study underline the role class 1 integrons as proxy of anthropogenic pollution and suggest this genetic platform as an important driver of aminoglycoside resistance genes, including high risk ARGs, of potential concern for human health.
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Affiliation(s)
- Gianluca Corno
- National Research Council of Italy - Water Research Institute (CNR-IRSA) Molecular Ecology Group (MEG), Verbania, Italy.
| | - Timothy Ghaly
- ARC Centre of Excellence in Synthetic Biology and Department of Biological Sciences, Macquarie University, Sydney, New South Wales, Australia
| | - Raffaella Sabatino
- National Research Council of Italy - Water Research Institute (CNR-IRSA) Molecular Ecology Group (MEG), Verbania, Italy
| | - Ester M Eckert
- National Research Council of Italy - Water Research Institute (CNR-IRSA) Molecular Ecology Group (MEG), Verbania, Italy
| | - Silvia Galafassi
- National Research Council of Italy - Water Research Institute (CNR-IRSA) Molecular Ecology Group (MEG), Verbania, Italy
| | - Michael R Gillings
- ARC Centre of Excellence in Synthetic Biology and Department of Biological Sciences, Macquarie University, Sydney, New South Wales, Australia
| | - Andrea Di Cesare
- National Research Council of Italy - Water Research Institute (CNR-IRSA) Molecular Ecology Group (MEG), Verbania, Italy
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Gao YX, Li X, Zhao JR, Zhang ZX, Fan XY. Impacts of combined pollution under gradient increasing and gradient decreasing exposure modes on activated sludge: Microbial communities and antibiotic resistance genes. BIORESOURCE TECHNOLOGY 2022; 345:126568. [PMID: 34921920 DOI: 10.1016/j.biortech.2021.126568] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/07/2021] [Accepted: 12/10/2021] [Indexed: 06/14/2023]
Abstract
The responses of microbial communities and antibiotic resistance genes (ARGs) to azithromycin and copper combined pollution under gradient increasing (from 0.5 to 10 mg/L) and decreasing exposure (from 10 to 0.5 mg/L) modes were investigated. Nitrification was inhibited more obviously under gradient increasing exposure mode. Responses of archaeal community and function structure were more obvious than bacteria under both exposure modes. The dominant bacterial and archaeal compositions (Hyphomicrobium, Euryarchaeota, etc.) were affected by two exposure modes, except some rare archaea (Methanoregula and Methanosarcina). There were more positive correlations between bacteria and archaea, and Nitrospira was keystone genus. Ammonia-oxidizing archaea (0.37-3.06%) and complete ammonia oxidizers (Nitrospira_ENR4) were enriched, and Nitrososphaera_viennensis was closely related to denitrifying genes (napA/B, nosZ, etc.). 50 ARG subtypes were detected and specific ARG subtypes (aac, ImrA, etc.) proliferated in two exposure modes. Bacteria and archaea were common hosts for 24 ARGs and contributed to their shifts.
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Affiliation(s)
- Yu-Xi Gao
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Xing Li
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Jun-Ru Zhao
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Zhong-Xing Zhang
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Xiao-Yan Fan
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, PR China.
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Nielsen MC, Jiang SC. 16S rRNA gene sequencing data of the human skin microbiome before and after swimming in the ocean. Data Brief 2021; 37:107207. [PMID: 34189199 PMCID: PMC8215175 DOI: 10.1016/j.dib.2021.107207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 06/07/2021] [Accepted: 06/08/2021] [Indexed: 11/29/2022] Open
Abstract
These data represent the abundance, diversity and predicted function gene profiles of the microbial communities present on human skin before and after swimming in the ocean. The skin microbiome has been shown to provide protection against infection from pathogenic bacteria. It is well-known that exposure to ocean water can cause skin infection, but little is known about how exposure can alter the bacterial communities on the skin. Skin microbiome samples were collected from human participants before and after swimming in the ocean. These data were used to analyze the changes in abundance and diversity of microbial communities on the skin and the changes in the functional profiles of the bacteria, specifically focusing on genes involved in antibiotic resistance and bacterial virulence.
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Affiliation(s)
- Marisa C Nielsen
- Environmental Health Sciences, University of California, Irvine, United States
| | - Sunny C Jiang
- Environmental Health Sciences, University of California, Irvine, United States.,Civil and Environmental Engineering, University of California, Irvine, CA, United States
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