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Liu H, Yao Y, Ye W, Qian R, Chen H, Liang J, Ye J. Enhanced removal of antibiotics and decreased antibiotic resistance genes in the photo-sequencing batch reactor during the aquaculture wastewater treatment. ENVIRONMENTAL TECHNOLOGY 2022; 43:3608-3619. [PMID: 34006208 DOI: 10.1080/09593330.2021.1928295] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 05/02/2021] [Indexed: 06/12/2023]
Abstract
The performance of photo-sequencing batch reactor (PSBR) in removing multiple antibiotics and nutrients from aquaculture wastewater as well as the antibiotic resistance genes (ARGs) proliferation were firstly investigated during the long-term experiments. The operational conditions (i.e. light intensity, light time, aeration and solid retention time) were optimised to realise the simultaneous removal of antibiotics and nutrients. It was found that, compared with traditional SBR, PSBR has similar nutrient removal rate and a 30% higher antibiotics removal rate due to the corporation of microalgae (Chlorella) and bacteria, and the absolute abundance of ARGs decreased by 78% in PSBR. Further investigation showed that PSBR had certain advantages in removing quinolones and the corresponding removal rate could reach up to 90%. In terms of the mechanisms, the possible metabolic pathway of antibiotic was analysed and the intermediate metabolites were different from that of the reported studies. The microbial communities were also affected by microalgae and the relative abundance of certain bacteria (such as members of the families Rhodocyclaceae and Burkholderiaceae), which were positively correlated with some ARGs, decreased in PSBR. This study provides an alternative and effective method to aquaculture wastewater treatment, which present high nutrients and antibiotics removal efficiencies and low ARGs transmission.
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Affiliation(s)
- Hui Liu
- Water Research Institute, Shanghai Academy of Environmental Sciences, Shanghai, People's Republic of China
| | - Yuheng Yao
- Water Research Institute, Shanghai Academy of Environmental Sciences, Shanghai, People's Republic of China
| | - Wenfeng Ye
- Water Research Institute, Shanghai Academy of Environmental Sciences, Shanghai, People's Republic of China
| | - Rui Qian
- Water Research Institute, Shanghai Academy of Environmental Sciences, Shanghai, People's Republic of China
| | - Hao Chen
- Water Research Institute, Shanghai Academy of Environmental Sciences, Shanghai, People's Republic of China
| | - Junyu Liang
- Water Research Institute, Shanghai Academy of Environmental Sciences, Shanghai, People's Republic of China
| | - Jianfeng Ye
- Water Research Institute, Shanghai Academy of Environmental Sciences, Shanghai, People's Republic of China
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Evolution of antibiotic resistance at low antibiotic concentrations including selection below the minimal selective concentration. Commun Biol 2020; 3:467. [PMID: 32884065 PMCID: PMC7471295 DOI: 10.1038/s42003-020-01176-w] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 07/24/2020] [Indexed: 12/15/2022] Open
Abstract
Determining the selective potential of antibiotics at environmental concentrations is critical for designing effective strategies to limit selection for antibiotic resistance. This study determined the minimal selective concentrations (MSCs) for macrolide and fluoroquinolone antibiotics included on the European Commissionʼs Water Framework Directive’s priority hazardous substances Watch List. The macrolides demonstrated positive selection for ermF at concentrations 1–2 orders of magnitude greater (>500 and <750 µg/L) than measured environmental concentrations (MECs). Ciprofloxacin illustrated positive selection for intI1 at concentrations similar to current MECs (>7.8 and <15.6 µg/L). This highlights the need for compound specific assessment of selective potential. In addition, a sub-MSC selective window defined by the minimal increased persistence concentration (MIPC) is described. Differential rates of negative selection (or persistence) were associated with elevated prevalence relative to the no antibiotic control below the MSC. This increased persistence leads to opportunities for further selection over time and risk of human exposure and environmental transmission. Stanton et al. determine the minimal selective concentrations for macrolide and fluoroquinolone antibiotics and describe a selective window defined by the minimal increased persistence concentration. These assessments and thresholds allow for better assessment of potential selection for antibiotic resistance and the risks of human exposure and environmental transmission.
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Zhao S, Rogers MJ, He J. Abundance of organohalide respiring bacteria and their role in dehalogenating antimicrobials in wastewater treatment plants. WATER RESEARCH 2020; 181:115893. [PMID: 32502751 DOI: 10.1016/j.watres.2020.115893] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 03/25/2020] [Accepted: 04/26/2020] [Indexed: 06/11/2023]
Abstract
Anthropogenic organohalide contaminants present in wastewater treatment plants (WWTPs) often remain untreated and can be discharged into the environment. Although organohalide respiring bacteria (OHRB) contribute to the elimination of anthropogenic organohalides in natural anaerobic environments, reductive dehalogenation by OHRB in mainstream WWTPs remains poorly understood. In this study, we quantified OHRB during a long-term operation of a municipal WWTP with short hydraulic and sludge retention times (3 h and 1.5-5 days, respectively). The obligate OHRB were detected at high levels (averaging 2.56 ± 1.73 × 107 and 3.11 ± 1.16 × 107 16S rRNA gene copies/ml MLSS sludge in anoxic and aerobic zones, respectively) over the entire sampling period and throughout the wastewater treatment train. Microcosms derived from mainstream activated sludge contained an unidentified member of the Dehalococcoides genus that metabolically dechlorinated triclosan, used as a representative emerging organohalide antimicrobial, to diclosan, suggesting the potential of anaerobic degradation of emerging contaminants in WWTPs. To further understand the mechanisms for such antimicrobials' removal, an investigation of dechlorination of triclosan by Dehalococcoides strains was conducted. Dechlorination of environmentally relevant concentrations of triclosan to diclosan was observed in Dehalococcoides mccartyi strain CG1, yielding 4.59 ± 0.34 × 108 cells/μmole Cl- removed at a rate of 0.062 μM/day and a minimal inhibitory concentration of 0.5 mg/L. Notably, both the tolerance of strain CG1 to triclosan and the rate of triclosan dechlorination increased when CG1 was cultured in the presence of both triclosan and tetrachloroethene. Taken together, our results suggest that anaerobic degradation of organohalide antimicrobials might be more prevalent in mainstream WWTPs than previously speculated, though the low growth yields that are supported by triclosan dechlorination seem to indicate that other organohalide substrates could be necessary to sustain OHRB populations in these systems.
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Affiliation(s)
- Siyan Zhao
- Department of Civil and Environmental Engineering, National University of Singapore, 117576, Singapore
| | - Matthew J Rogers
- Department of Civil and Environmental Engineering, National University of Singapore, 117576, Singapore
| | - Jianzhong He
- Department of Civil and Environmental Engineering, National University of Singapore, 117576, Singapore.
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Zhang X, Chen G, Zhong S, Wang T, Ji M, Wu X, Zhang X. Antibiotic-induced role interchange between rare and predominant bacteria retained the function of a bacterial community for denitrifying quinoline degradation. J Appl Microbiol 2020; 129:1598-1608. [PMID: 32592325 DOI: 10.1111/jam.14755] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 05/04/2020] [Accepted: 06/19/2020] [Indexed: 12/17/2022]
Abstract
AIM Quinoline is a recalcitrant pollutant in coking wastewater which has been broadly investigated with many isolates possessing aerobic quinoline-degrading ability. However, studies on anaerobic degradation and the corresponding bacteria are very scarce. This study attempted to investigate the role of diverse functional members and the redundancy of quinoline degradation in a lab-scale quinoline denitrifying bioreactor. METHODS AND RESULTS Antibiotics were added to the batch culture under denitrifying conditions to disturb the microbial community of the quinoline-degrading bioreactor. According to the results, the nitrate removal rate remained stable, and the quinoline removal rate increased by 9·7% after treatment with streptomycin. However, PCoA analysis of 16S rRNA gene sequencing data of these samples indicated a significant shift in microbial community structures. Specifically, 12 operational taxonomic units (OTUs), including OTU1 (Pseudomonas) and OTU2 (Achromobacter), were significantly enriched. OTU1 replaced OTU8 (Thauera) as the most predominant denitrifying quinoline-degrading member. However, OTU8 and other predominant OTUs (Comamonas and Pseudoxanthomonas), which were hypothesized to contribute essentially to quinoline degradation in the origin bioreactor, became almost undetectable. CONCLUSION Functional redundancy due to high biological diversity allowed the role reversal of predominant quinoline-degrading bacteria and other rare bacteria when disturbed by antibiotic stress. Although the abundance of OTU1 was much lower initially, it replaced the essential role of the predominant member OTU8 in the bioreactor community for quinoline degradation once the environmental condition changed. SIGNIFICANCE AND IMPACT OF THE STUDY This study indicated that the high biological diversity in a wastewater treatment bacterial community is crucial for maintaining the degrading function of organic pollutants, especially in a changing environment due to external disturbance or stress.
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Affiliation(s)
- X Zhang
- State Key Laboratory of Microbial Metabolism, and Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - G Chen
- State Key Laboratory of Microbial Metabolism, and Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - S Zhong
- State Key Laboratory of Microbial Metabolism, and Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - T Wang
- State Key Laboratory of Microbial Metabolism, and Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - M Ji
- State Key Laboratory of Microbial Metabolism, and Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - X Wu
- State Key Laboratory of Microbial Metabolism, and Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - X Zhang
- State Key Laboratory of Microbial Metabolism, and Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
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Biodegradation of antibiotics: The new resistance determinants – part II. N Biotechnol 2020; 54:13-27. [DOI: 10.1016/j.nbt.2019.08.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 07/17/2019] [Accepted: 08/11/2019] [Indexed: 02/06/2023]
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Cai Q, Hu J. Effect of UVA/LED/TiO 2 photocatalysis treated sulfamethoxazole and trimethoprim containing wastewater on antibiotic resistance development in sequencing batch reactors. WATER RESEARCH 2018; 140:251-260. [PMID: 29723814 DOI: 10.1016/j.watres.2018.04.053] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Revised: 03/30/2018] [Accepted: 04/23/2018] [Indexed: 06/08/2023]
Abstract
Controlling of antibiotics is the crucial step for preventing antibiotic resistance genes (ARGs) dissemination; UV photocatalysis has been identified as a promising pre-treatment technology for antibiotics removal. However, information about the effects of intermediates present in the treated antibiotics wastewater on the downstream biological treatment processes or ARGs development is very limited. In the present study, continuous UVA/LED/TiO2 photocatalysis removed more than 90% of 100 ppb sulfamethoxazole (SMX)/trimethoprim (TMP), the treated wastewater was fed into SBR systems for over one year monitoring. Residual SMX/TMP (2-3 ppb) and intermediates present in the treated wastewater did not adversely affect SBR performance in terms of TOC and TN removal. SMX and TMP resistance genes (sulI, sulII, sulIII, dfrII, dfrV and dfr13) were also quantified in SBRs microbial consortia. Results suggested that continuous feeding of treated SMX/TMP containing wastewaters did not trigger any ARGs promotion during the one year operation. By stopping the input of 100 ppb SMX/TMP, abundance of sulII and dfrV genes were reduced by 83% and 100%, respectively. sulI gene was identified as the most persistence ARG, and controlling of 100 ppb SMX input did not achieve significant removal of sulI gene. A significant correlation between sulI gene and class 1 integrons was found at the level of p = 1.4E-10 (r = 0.94), and sulII gene positively correlated with the plasmid transfer efficiency (r = 2.442E-10, r = 0.87). Continuous input of 100 ppb SMX enhanced plasmid transfer efficiency in the SBR system, resulting in sulII gene abundance increasing more than 40 times.
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Affiliation(s)
- Qinqing Cai
- Department of Civil and Environmental Engineering, National University of Singapore, 10 Kent Ridge Crescent, 119260, Singapore
| | - Jiangyong Hu
- Department of Civil and Environmental Engineering, National University of Singapore, 10 Kent Ridge Crescent, 119260, Singapore.
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Mustapha NA, Hu A, Yu CP, Sharuddin SS, Ramli N, Shirai Y, Maeda T. Seeking key microorganisms for enhancing methane production in anaerobic digestion of waste sewage sludge. Appl Microbiol Biotechnol 2018; 102:5323-5334. [DOI: 10.1007/s00253-018-9003-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 04/04/2018] [Accepted: 04/07/2018] [Indexed: 11/24/2022]
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8
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Louvet JN, Carrion C, Stalder T, Alrhmoun M, Casellas M, Potier O, Pons MN, Dagot C. Vancomycin sorption on activated sludge Gram + bacteria rather than on EPS; 3D Confocal Laser Scanning Microscopy time-lapse imaging. WATER RESEARCH 2017; 124:290-297. [PMID: 28772141 DOI: 10.1016/j.watres.2017.07.056] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 07/19/2017] [Accepted: 07/22/2017] [Indexed: 06/07/2023]
Abstract
Antibiotics-bacteria interactions depend on antibiotic concentration at the scale of bacteria. This study investigates how vancomycin penetrates into activated sludge flocs and can be sorbed on the bacteria and extracellular polymeric substances (EPS). The 3D structure of flocs was imaged using EPS autofluorescence. The green fluorescent BODIPY® FL vancomycin was introduced in a microscopic chamber containing activated sludge and penetration of vancomycin into the flocs by diffusion was observed using time-lapse microscopy. The penetration depended on the floc structure, as long and large pores could go through the whole flocs making preferential path. The antibiotic concentration into the flocs was also found to depend on the sorption rate. BODIPY® FL vancomycin was found to bind preferentially into Gram+ bacteria than on EPS. The vancomycin adsorption constant on bacteria according to the linear adsorption model, Kdbacteria was estimated to be 5 times higher (SD 2.6) than the adsorption constant on EPS KdEPS. These results suggest that antibiotic removal by sorption into wastewater treatment plants could change according to the amount of bacteria in the sludge. Moreover, antibiotic concentration at the scale of bacteria could be significantly higher than the concentration in the bulk solution and this should be taken into account when studying antibiotic activity or biodegradation.
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Affiliation(s)
- J N Louvet
- Université de Toulouse, INSA, LISBP, 135 Avenue de Rangueil, F-31077, Toulouse, France; Groupement de Recherche Eau Sol Environnement EA 4330, Site de l'ENSIL, Parc ESTER Technopôle, 16 rue Atlantis, 87068, Limoges Cedex, France
| | - C Carrion
- Plateforme cytométrie imagerie et mathématiques, CHU Limoges-CNRS-Université de Limoges, 2 rue du Dr Marcland, 87025, Limoges Cedex, France
| | - T Stalder
- Groupement de Recherche Eau Sol Environnement EA 4330, Site de l'ENSIL, Parc ESTER Technopôle, 16 rue Atlantis, 87068, Limoges Cedex, France; U12092 Inserm, Laboratoire debactériologie-virologie, Faculté de Médecine, 2 avenue du Docteur Marcland, 87000, Limoges Cedex, France
| | - M Alrhmoun
- Groupement de Recherche Eau Sol Environnement EA 4330, Site de l'ENSIL, Parc ESTER Technopôle, 16 rue Atlantis, 87068, Limoges Cedex, France
| | - M Casellas
- Groupement de Recherche Eau Sol Environnement EA 4330, Site de l'ENSIL, Parc ESTER Technopôle, 16 rue Atlantis, 87068, Limoges Cedex, France
| | - O Potier
- Laboratoire Réactions et Génie des Procédés (UPR 3349 CNRS), Université de Lorraine, INPL, 1 rue Grandville, BP 20451, F-54001, Nancy Cedex, France
| | - M N Pons
- Laboratoire Réactions et Génie des Procédés (UPR 3349 CNRS), Université de Lorraine, INPL, 1 rue Grandville, BP 20451, F-54001, Nancy Cedex, France
| | - C Dagot
- Groupement de Recherche Eau Sol Environnement EA 4330, Site de l'ENSIL, Parc ESTER Technopôle, 16 rue Atlantis, 87068, Limoges Cedex, France.
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Dungan RS, Snow DD, Bjorneberg DL. Occurrence of Antibiotics in an Agricultural Watershed in South-Central Idaho. JOURNAL OF ENVIRONMENTAL QUALITY 2017; 46:1455-1461. [PMID: 29293847 DOI: 10.2134/jeq2017.06.0229] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The polar organic compound integrative sampler (POCIS) is a tool that has been effectively used to passively sample organic pollutants over long periods in aquatic environments. In this study, POCIS were used to investigate the spatial and temporal occurrence of 21 antibiotics in irrigation return flows and upstream sites of an intensively managed agricultural watershed in south-central Idaho. The antibiotic metabolite, erythromycin-HO, and the antibiotics monensin, oxytetracycline, sulfadimethoxine, sulfamethazine, sulfamethoxazole, trimethoprim, and tylosin were detected at frequencies ranging from 3.1 to 62.5%, with monensin having the highest rate of detection. The fact that monensin was the most frequently detected compound indicates that it is entering return flows in runoff from fields that had received livestock manure or wastewater. Antibiotics (except oxytetracycline, sulfamethazine, and tylosin) were also detected at an upstream site that consisted of diverted Snake River water and is the source of irrigation water for the watershed. Therefore, even cropped soils that are not treated with manure are still receiving low-level antibiotics during irrigation events. This study provides the first set of evidence that surface waters within this agricultural watershed contain antibiotic residues associated with veterinary and human uses.
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Liu H, Yang Y, Ge Y, Zhao L, Long S, Zhang R. Interaction between common antibiotics and a Shewanella strain isolated from an enhanced biological phosphorus removal activated sludge system. BIORESOURCE TECHNOLOGY 2016; 222:114-122. [PMID: 27716563 DOI: 10.1016/j.biortech.2016.09.096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 09/16/2016] [Accepted: 09/22/2016] [Indexed: 06/06/2023]
Abstract
With increasing production and consumption, more antibiotics are discharged into wastewater treatment plants and generally cannot be sufficiently removed. Because of the complexities of biological treatment processes, the fates of antibiotics and their effects on microorganisms, particularly those involved in the phosphorus removal system, are still unclear. Here, a Shewanella strain was isolated from an enhanced biological phosphorus removal (EBPR) system and was found to have the ability to remove phosphorus (P) and chemical oxygen demand (CODcr). Antibiotics affected the Shewanella strain through metabolism of the three main intracellular polymers, altering the ability of the strain to remove P and CODcr. These effects varied with the structure and concentration of the antibiotics. The Shewanella strain removed cefalexin and amoxicillin by degradation or adsorption, producing 2-hydroxy-3-phenyl pyrazine from cefalexin. This study enabled the recognition of the effect and removal of antibiotics during wastewater treatment.
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Affiliation(s)
- Hang Liu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Yongkui Yang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Yanhui Ge
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Lin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
| | - Sha Long
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Ruochun Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
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Matos M, Pereira MA, Parpot P, Brito AG, Nogueira R. Influence of tetracycline on the microbial community composition and activity of nitrifying biofilms. CHEMOSPHERE 2014; 117:295-302. [PMID: 25127228 DOI: 10.1016/j.chemosphere.2014.06.094] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 06/27/2014] [Accepted: 06/28/2014] [Indexed: 06/03/2023]
Abstract
The present work aims to evaluate the bacterial composition and activity (carbon and nitrogen removal) of nitrifying biofilms exposed to 50 μg L(-1) of tetracycline. The tetracycline removal efficiency and the occurrence of tetracycline resistance (tet) genes were also studied. Two sequencing batch biofilm reactors (SBBRs) fed with synthetic wastewater were operated without (SBBR1) and with (SBBR2) the antibiotic. Both SBBRs showed similar organic matter biodegradation and nitrification activity. Tetracycline removal was about 28% and biodegradation was probably the principal removal mechanism of the antibiotic. Polymerase chain reaction-denaturing gradient gel electrophoresis analysis of the bacterial community showed shifts leading to not only the fading of some ribotypes, but also the emergence of new ones in the biofilm with tetracycline. The study of the tet genes showed that tet(S) was only detected in the biofilm with tetracycline, suggesting a relationship between its occurrence and the presence of the antibiotic.
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Affiliation(s)
- Maria Matos
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
| | - Maria A Pereira
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Pier Parpot
- Centre of Chemistry, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - António G Brito
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Institute of Agronomy, Department of Biosystems Sciences and Engineering, University of Lisbon, Tapada da ajuda, 1349-017 Lisboa, Portugal
| | - Regina Nogueira
- ISAH - Institute of Sanitary Engineering and Waste Management, University of Hannover, Welfengarten 1, D-30167 Hannover, Germany
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Wang S, Fan C, Low A, He J. Comparison of microbial communities in sequencing batch reactors (SBRs) exposed to trace erythromycin and erythromycin-H2O. Appl Microbiol Biotechnol 2013; 98:2667-73. [DOI: 10.1007/s00253-013-5205-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 08/14/2013] [Accepted: 09/01/2013] [Indexed: 11/30/2022]
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Dodd MC. Potential impacts of disinfection processes on elimination and deactivation of antibiotic resistance genes during water and wastewater treatment. ACTA ACUST UNITED AC 2012; 14:1754-71. [DOI: 10.1039/c2em00006g] [Citation(s) in RCA: 299] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Rho H, Shin B, Lee O, Choi YH, Rho J, Lee J. Antibiotic resistance profile of bacterial isolates from animal farming aquatic environments and meats in a peri-urban community in Daejeon, Korea. ACTA ACUST UNITED AC 2012; 14:1616-21. [DOI: 10.1039/c2em30168g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Louvet JN, Attik G, Dumas D, Potier O, Pons MN. Simultaneous Gram and viability staining on activated sludge exposed to erythromycin: 3D CLSM time-lapse imaging of bacterial disintegration. Int J Hyg Environ Health 2011; 214:470-7. [DOI: 10.1016/j.ijheh.2011.02.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Revised: 02/01/2011] [Accepted: 02/14/2011] [Indexed: 10/18/2022]
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Fan C, He J. Proliferation of antibiotic resistance genes in microbial consortia of sequencing batch reactors (SBRs) upon exposure to trace erythromycin or erythromycin-H2O. WATER RESEARCH 2011; 45:3098-3106. [PMID: 21482429 DOI: 10.1016/j.watres.2011.03.025] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Revised: 03/14/2011] [Accepted: 03/14/2011] [Indexed: 05/30/2023]
Abstract
A variety of antibiotics and their metabolites at sub-inhibitory level concentrations are suspected to expand resistance genes in the environment. However, knowledge is limited on the causal correlation of trace antibiotics or their metabolites with resistance proliferation. In this study, erythromycin (ERY) resistance genes were screened on microbial consortia of sequencing batch reactors (SBRs) after one year acclimation to ERY (100 μg/L) or dehydrated erythromycin (ERY-H(2)O, 50 μg/L). The identified esterase gene ereA explains that ERY could be degraded to six products by microbes acclimated to ERY (100 μg/L). However, ERY could not be degraded by microbes acclimated to ERY-H(2)O (50 μg/L), which may be due to the less proliferated ereA gene. Biodegradation of ERY required the presence of exogenous carbon source (e.g., glucose) and nutrients (e.g., nitrogen, phosphorus) for assimilation, but overdosed ammonium-N (>40 mg/L) inhibited degradation of ERY. Zoogloea, a kind of biofilm formation bacteria, became predominant in the ERY degradation consortia, suggesting that the input of ERY could induce biofilm resistance to antibiotics. Our study highlights that lower μg/L level of ERY or ERY-H(2)O in the environment encourages expansion of resistance genes in microbes.
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Affiliation(s)
- Caian Fan
- Department of Civil and Environmental Engineering, National University of Singapore, Block E2-02-13, 1 Engineering Drive 3, Singapore 117576, Singapore
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Louvet JN, Heluin Y, Attik G, Dumas D, Potier O, Pons MN. Assessment of erythromycin toxicity on activated sludge via batch experiments and microscopic techniques (epifluorescence and CLSM). Process Biochem 2010. [DOI: 10.1016/j.procbio.2010.03.036] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Effect of antibiotics in the environment on microbial populations. Appl Microbiol Biotechnol 2010; 87:925-41. [DOI: 10.1007/s00253-010-2649-5] [Citation(s) in RCA: 215] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2010] [Revised: 04/24/2010] [Accepted: 04/25/2010] [Indexed: 10/25/2022]
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