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Li C, Lu J, Liu J, Zhang G, Tong Y, Ma N. Exploring the correlations between antibiotics and antibiotic resistance genes in the wastewater treatment plants of hospitals in Xinjiang, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:15111-21. [PMID: 27094265 DOI: 10.1007/s11356-016-6688-z] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 04/12/2016] [Indexed: 05/21/2023]
Abstract
Various antibiotics have been extensively used to treating infectious diseases in hospitals. In this study, the abundance and diversity of antibiotics and antibiotic resistance genes (ARGs) were observed in the wastewater samples from five hospitals in Xinjiang, China. The total concentrations of tetracyclines, sulphonamides, and quinolones in hospital influents ranged from 363.4 to 753.3 ng/L, 285.5 to 634.9 ng/L, and 1355.8 to 1922.4 ng/L, respectively. However, the removal efficiency of tetracyclines, sulphonamides, and quinolones in wastewater treatment processes ranged from 72.4 to 79.3 %, 36.0 to 52.2 %, and 45.1 to 55.4 %, respectively. The contamination levels of the selected ARGs varied in all wastewater samples. The highest relative concentrations of sul1, sul2, tetQ, and qnrS were significantly higher than those of other ARGs in this study. Significant positive correlations between the relative abundance of partial ARGs and concentrations of certain antibiotics were observed in hospital wastewaters. Results show that integrons played an important role in disseminating and distributing ARGs in microorganism systems. Furthermore, strong correlations were observed between tetQ, sulphonamide resistance genes (except sulA) and intI1. This study aimed to determine the contamination levels of antibiotics and ARGs and analyze the relationships among ARGs, and antibiotics and integron genes in hospital wastewaters.
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Affiliation(s)
- Chao Li
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China
| | - Jianjiang Lu
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China.
| | - Jiang Liu
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China
| | - Genlin Zhang
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China
| | - Yanbing Tong
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China
| | - Na Ma
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang, China
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Sun W, Qian X, Gu J, Wang XJ, Duan ML. Mechanism and Effect of Temperature on Variations in Antibiotic Resistance Genes during Anaerobic Digestion of Dairy Manure. Sci Rep 2016; 6:30237. [PMID: 27444518 PMCID: PMC4957233 DOI: 10.1038/srep30237] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 07/01/2016] [Indexed: 01/10/2023] Open
Abstract
Animal manure comprises an important reservoir for antibiotic resistance genes (ARGs), but the variation in ARGs during anaerobic digestion at various temperatures and its underlying mechanism remain unclear. Thus, we performed anaerobic digestion using dairy manure at three temperature levels (moderate: 20 °C, mesophilic: 35 °C, and thermophilic: 55 °C), to analyze the dynamics of ARGs and bacterial communities by quantitative PCR and 16S rRNA gene sequencing. We found that 8/10 detected ARGs declined and 5/10 decreased more than 1.0 log during thermophilic digestion, whereas only four and five ARGs decreased during moderate and mesophilic digestion, respectively. The changes in ARGs and bacterial communities were similar under the moderate and mesophilic treatments, but distinct from those in the thermophilic system. Potential pathogens such as Bacteroidetes, Proteobacteria, and Corynebacterium were removed by thermophilic digestion but not by moderate and mesophilic digestion. The bacterial community succession was the dominant mechanism that influenced the variation in ARGs and integrons during anaerobic digestion. Thermophilic digestion decreased the amount of mesophilic bacteria (Bacteroidetes and Proteobacteria) carrying ARGs. Anaerobic digestion generally decreased the abundance of integrons by eliminating the aerobic hosts of integrons (Actinomycetales and Bacilli). Thermophilic anaerobic digestion is recommended for the treatment and reuse of animal manure.
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Affiliation(s)
- Wei Sun
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xun Qian
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jie Gu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiao-Juan Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Man-Li Duan
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
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Aydin S. Microbial sequencing methods for monitoring of anaerobic treatment of antibiotics to optimize performance and prevent system failure. Appl Microbiol Biotechnol 2016; 100:5313-21. [DOI: 10.1007/s00253-016-7533-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 03/22/2016] [Accepted: 04/05/2016] [Indexed: 01/22/2023]
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Aydin S, Ince B, Ince O. Assessment of anaerobic bacterial diversity and its effects on anaerobic system stability and the occurrence of antibiotic resistance genes. BIORESOURCE TECHNOLOGY 2016; 207:332-338. [PMID: 26897411 DOI: 10.1016/j.biortech.2016.01.080] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Revised: 01/19/2016] [Accepted: 01/21/2016] [Indexed: 06/05/2023]
Abstract
This study evaluated the link between anaerobic bacterial diversity and, the biodegradation of antibiotic combinations and assessed how amending antibiotic combination and increasing concentration of antibiotics in a stepwise fashion influences the development of resistance genes in anaerobic reactors. The biodegradation, sorption and occurrence of the known antibiotic resistance genes (ARGs) of erythromycin and tetracycline were investigated using the processes of UV-HPLC and qPCR analysis respectively. Ion Torrent sequencing was used to detect microbial community changes in response to the addition of antibiotics. The overall results indicated that changes in the structure of a microbial community lead to changes in biodegradation capacity, sorption of antibiotics combinations and occurrence of ARGs. The enhanced biodegradation efficiency appeared to generate variations in the structure of the bacterial community. The results suggested that controlling the ultimate Gram-negative bacterial community, especially Acinetobacter-related populations, may promote the successful biodegradation of antibiotic combinations and reduce the occurrence of ARGs.
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Affiliation(s)
- Sevcan Aydin
- Istanbul Technical University, Environmental Engineering Department, Maslak, Istanbul, Turkey.
| | - Bahar Ince
- Bogazici University, Institute of Environmental Sciences, Bebek, Istanbul, Turkey
| | - Orhan Ince
- Istanbul Technical University, Environmental Engineering Department, Maslak, Istanbul, Turkey
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55
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Youngquist CP, Mitchell SM, Cogger CG. Fate of Antibiotics and Antibiotic Resistance during Digestion and Composting: A Review. JOURNAL OF ENVIRONMENTAL QUALITY 2016; 45:537-545. [PMID: 27065401 DOI: 10.2134/jeq2015.05.0256] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Antibiotics and antibiotic-resistant bacteria (ARB) enter the environment through municipal and agricultural waste streams and pose a potential risk to human and livestock health through either direct exposure to antibiotic-resistant pathogens or selective pressure on the soil microbial community. This review summarizes current literature on the fate of antibiotics, ARB, and antibiotic resistance genes (ARGs) during anaerobic digestion and composting of manure and wastewater residuals. Studies have shown that removal of antibiotics varies widely during mesophilic anaerobic digestion, even within the same class of antibiotics. Research on ARB shows a wide range of removal under mesophilic conditions, with nearly complete removal under thermophilic conditions. Research on 16 antibiotics in 11 different studies using both bench-scale and farm-scale composting systems demonstrates that composting significantly reduces levels of extractable antibiotics in livestock manure in nearly all cases. Calculated half-lives ranged from 0.9 to 16 d for most antibiotics. There is more limited evidence that levels of ARB are also reduced by composting. Studies of the fate of ARGs show mixed evidence for removal during both mesophilic and thermophilic anaerobic digestion and during thermophilic composting. Antibiotic resistance genes are DNA structures, so they may persist until the DNA structure is degraded, yet the bacterium may have been rendered nonviable long before the DNA is completely degraded. Additional research would be of value to determine optimum anaerobic digestion and composting conditions for removal of ARB and to increase understanding of the fate of ARGs during anaerobic digestion and composting.
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Biswas S, Pandey PK, Farver TB. Assessing the impacts of temperature and storage on Escherichia coli, Salmonella, and L. monocytogenes decay in dairy manure. Bioprocess Biosyst Eng 2016; 39:901-13. [PMID: 26922419 DOI: 10.1007/s00449-016-1569-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Accepted: 02/08/2016] [Indexed: 10/22/2022]
Abstract
Elevated levels of animal waste-borne pathogen in ambient water is a serious human health issue. Mitigating influx of pathogens from animal waste such as dairy manure to soil and water requires improving our existing knowledge of pathogen reductions in dairy manure treatment methods. This study was conducted to enhance the understanding of human pathogen decay in liquid dairy manure in anaerobic (AN) and limited aerobic (LA) storage conditions. The decay of three pathogens (Escherichia coli, Salmonella spp., and Listeria monocytogenes) was assessed in bench-scale batch reactors fed with liquid slurry. A series of temperatures (30, 35, 42, and 50 °C) conditions were tested to determine the impacts of temperature on Escherichia coli, Salmonella, and L. monocytogenes decay in AN and LA conditions. Results showed prolonged survival of E. coli compared to Salmonella and L. monocytogenes in both LA and AN environments. Variations in survival among pathogens with temperature and environmental conditions (i.e., LA and AN) indicated the necessity of developing improved dairy manure waste treatment methods for controlling animal waste-borne pathogens. The results of this study will help in improving the current understanding of human pathogen decay in dairy manure for making informed decisions of animal manure treatment by stakeholders.
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Affiliation(s)
- Sagor Biswas
- Department of Population Health and Reproduction, School of Veterinary Medicine Extension, University of California-Davis, Davis, 95616, California, USA
| | - Pramod K Pandey
- Department of Population Health and Reproduction, School of Veterinary Medicine Extension, University of California-Davis, Davis, 95616, California, USA. .,University of California Division of Agriculture and Natural Resources, UC Cooperative Extension, Davis, 95616, California, USA.
| | - Thomas B Farver
- Department of Population Health and Reproduction, School of Veterinary Medicine Extension, University of California-Davis, Davis, 95616, California, USA
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Zurek K, Nayduch D. Bacterial Associations Across House Fly Life History: Evidence for Transstadial Carriage From Managed Manure. JOURNAL OF INSECT SCIENCE (ONLINE) 2016; 16:iev156. [PMID: 26798138 PMCID: PMC4725258 DOI: 10.1093/jisesa/iev156] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 12/09/2015] [Indexed: 06/05/2023]
Abstract
House flies (Diptera: Muscidae; Musca domestica L.) associate with microbe-rich substrates throughout life history. Because larvae utilize bacteria as a food source, most taxa present in the larval substrate, e.g., manure, are digested or degraded. However, some species survive and are present as third-instar larvae begin pupation. During metamorphosis, many bacteria are again lost during histolysis of the larval gut and subsequent remodeling to produce the gut of the imago. It has been previously demonstrated that some bacterial species survive metamorphosis, being left behind in the puparium, present on the body surface, or in the gut of the emerged adult. We used a combined culture-molecular approach to identify viable microbes from managed manure residue and a wild population of house fly larvae, pupae, puparia, and adults to assess transstadial carriage. All larval (10/10), pupal (10/10), and puparial (10/10) cultures were positive for bacteria. Several bacterial species that were present in larvae also were present either in pupae or puparia. Four viable bacterial species were detectable in 6 of 10 imagoes reared from manure. Of note is the apparent transstadial carriage of Bacillus sonorensis, which has been associated with milk spoilage at dairies, and Alcaligenes faecalis, which can harbor numerous antibiotic resistance genes on farms. The potential of newly emerged flies to harbor and disseminate bacteria from managed manure on farms is an understudied risk that deserves further evaluation.
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Affiliation(s)
- Klara Zurek
- Division of Biology, 116 Ackert Hall, Kansas State University, Manhattan, KS , Arthropod-Borne Animal Diseases Research Unit, USDA-ARS, 1515 College Avenue, Manhattan, KS 66502
| | - Dana Nayduch
- Arthropod-Borne Animal Diseases Research Unit, USDA-ARS, 1515 College Avenue, Manhattan, KS 66502
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58
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Sheets JP, Yang L, Ge X, Wang Z, Li Y. Beyond land application: Emerging technologies for the treatment and reuse of anaerobically digested agricultural and food waste. WASTE MANAGEMENT (NEW YORK, N.Y.) 2015; 44:94-115. [PMID: 26235446 DOI: 10.1016/j.wasman.2015.07.037] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 07/08/2015] [Accepted: 07/21/2015] [Indexed: 06/04/2023]
Abstract
Effective treatment and reuse of the massive quantities of agricultural and food wastes generated daily has the potential to improve the sustainability of food production systems. Anaerobic digestion (AD) is used throughout the world as a waste treatment process to convert organic waste into two main products: biogas and nutrient-rich digestate, called AD effluent. Biogas can be used as a source of renewable energy or transportation fuels, while AD effluent is traditionally applied to land as a soil amendment. However, there are economic and environmental concerns that limit widespread land application, which may lead to underutilization of AD for the treatment of agricultural and food wastes. To combat these constraints, existing and novel methods have emerged to treat or reuse AD effluent. The objective of this review is to analyze several emerging methods used for efficient treatment and reuse of AD effluent. Overall, the application of emerging technologies is limited by AD effluent composition, especially the total solid content. Some technologies, such as composting, use the solid fraction of AD effluent, while most other technologies, such as algae culture and struvite crystallization, use the liquid fraction. Therefore, dewatering of AD effluent, reuse of the liquid and solid fractions, and land application could all be combined to sustainably manage the large quantities of AD effluent produced. Issues such as pathogen regrowth and prevalence of emerging organic micro-pollutants are also discussed.
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Affiliation(s)
- Johnathon P Sheets
- Department of Food, Agricultural and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA
| | - Liangcheng Yang
- Department of Health Sciences, Illinois State University, 324 Felmley Hall, Normal, IL 61790, USA
| | - Xumeng Ge
- Department of Food, Agricultural and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA
| | - Zhiwu Wang
- The Ohio State University ATI, 1328 Dover Rd, Wooster, OH 44691, USA
| | - Yebo Li
- Department of Food, Agricultural and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA.
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59
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Jo Y, Kim J, Hwang S, Lee C. Anaerobic treatment of rice winery wastewater in an upflow filter packed with steel slag under different hydraulic loading conditions. BIORESOURCE TECHNOLOGY 2015; 193:53-61. [PMID: 26117235 DOI: 10.1016/j.biortech.2015.06.046] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 06/06/2015] [Accepted: 06/10/2015] [Indexed: 06/04/2023]
Abstract
Rice-washing drainage (RWD), a strong organic wastewater, was anaerobically treated using an upflow filter filled with blast-furnace slag. The continuous performance of the reactor was examined at varying hydraulic retention times (HRTs). The reactor achieved 91.7% chemical oxygen demand removal (CODr) for a 10-day HRT (0.6 g COD/Ld organic loading rate) and maintained fairly stable performance until the HRT was shortened to 2.2 days (CODr > 84%). Further decreases in HRT caused process deterioration (CODr < 50% and pH < 5.5 for a 0.7-day HRT). The methane production rate increased with decreasing HRT to reach the peak level for a 1.3-day HRT, whereas the yield was significantly greater for 3.4-day or longer HRTs. The substrate removal and methane production kinetics were successfully evaluated, and the generated kinetic models produced good performance predictions. The methanogenic activity of the reactor likely relies on the filter biofilm, with Methanosaeta being the main driver.
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Affiliation(s)
- Yeadam Jo
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 689-798, Republic of Korea
| | - Jaai Kim
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 689-798, Republic of Korea
| | - Seokhwan Hwang
- School of Environmental Science and Engineering, POSTECH, Pohang, Gyungbuk 790-784, Republic of Korea
| | - Changsoo Lee
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 689-798, Republic of Korea.
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60
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Teodora Tihan G, Ungureanu C, Constantin Barbaresso R, Gabriela Zgârian R, Rău I, Meghea A, Georgiana Albu M, Violeta Ghica M. Chloramphenicol collagen sponges for local drug delivery in dentistry. CR CHIM 2015. [DOI: 10.1016/j.crci.2015.06.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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61
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Siddique MNI, Sakinah M, Zularisam A. Influence of flow rate variation on bio-energy generation during anaerobic co-digestion. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.12.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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62
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Aydin S, Ince B, Cetecioglu Z, Arikan O, Ozbayram EG, Shahi A, Ince O. Combined effect of erythromycin, tetracycline and sulfamethoxazole on performance of anaerobic sequencing batch reactors. BIORESOURCE TECHNOLOGY 2015; 186:207-214. [PMID: 25817031 DOI: 10.1016/j.biortech.2015.03.043] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 03/03/2015] [Accepted: 03/07/2015] [Indexed: 06/04/2023]
Abstract
The combined effects of erythromycin-tetracycline-sulfamethoxazole (ETS) and sulfamethoxazole-tetracycline (ST) antibiotics on the performance of anaerobic sequencing batch reactors were studied. A control reactor was fed with wastewater that was free of antibiotics, while two additional reactors were fed with ETS and ST. The way in which the ETS and ST mixtures impact COD removal, VFA production, antibiotic degradation, biogas production and composition were investigated. The effects of the ETS mixtures were different from the ST mixtures, erythromycin can have an antagonistic effect on sulfamethoxazole and tetracycline. The anaerobic pre-treatment of these antibiotics can represent a suitable alternative to the use of chemical treatments for concentrations at 10 mg/L of S and 1 mg/L of T; 2 mg/L of E, 2 mg/L of T and 20 mg/L of S for the ST and ETS reactors respectively, which corresponds to min 70% COD removal efficiency.
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Affiliation(s)
- Sevcan Aydin
- Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul, Turkey.
| | - Bahar Ince
- Institutes of Environmental Sciences, Bogazici University, Bebek, Istanbul, Turkey
| | - Zeynep Cetecioglu
- Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul, Turkey
| | - Osman Arikan
- Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul, Turkey
| | - E Gozde Ozbayram
- Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul, Turkey
| | - Aiyoub Shahi
- Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul, Turkey
| | - Orhan Ince
- Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul, Turkey
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Abstract
Antibiotic resistance is a threat to human and animal health worldwide, and key measures are required to reduce the risks posed by antibiotic resistance genes that occur in the environment. These measures include the identification of critical points of control, the development of reliable surveillance and risk assessment procedures, and the implementation of technological solutions that can prevent environmental contamination with antibiotic resistant bacteria and genes. In this Opinion article, we discuss the main knowledge gaps, the future research needs and the policy and management options that should be prioritized to tackle antibiotic resistance in the environment.
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Schauss T, Glaeser SP, Gütschow A, Dott W, Kämpfer P. Improved detection of extended spectrum beta-lactamase (ESBL)-producing Escherichia coli in input and output samples of German biogas plants by a selective pre-enrichment procedure. PLoS One 2015; 10:e0119791. [PMID: 25799434 PMCID: PMC4370489 DOI: 10.1371/journal.pone.0119791] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 01/29/2015] [Indexed: 12/12/2022] Open
Abstract
The presence of extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli was investigated in input (manure from livestock husbandry) and output samples of six German biogas plants in 2012 (one sampling per biogas plant) and two German biogas plants investigated in an annual cycle four times in 2013/2014. ESBL-producing Escherichia coli were cultured by direct plating on CHROMagar ESBL from input samples in the range of 100 to 104 colony forming units (CFU) per g dry weight but not from output sample. This initially indicated a complete elimination of ESBL-producing E. coli by the biogas plant process. Detected non target bacteria were assigned to the genera Acinetobacter, Pseudomonas, Bordetella, Achromobacter, Castellaniella, and Ochrobactrum. A selective pre-enrichment procedure increased the detection efficiency of ESBL-producing E. coli in input samples and enabled the detection in five of eight analyzed output samples. In total 119 ESBL-producing E. coli were isolated from input and 46 from output samples. Most of the E. coli isolates carried CTX-M-type and/or TEM-type beta lactamases (94%), few SHV-type beta lactamase (6%). Sixty-four blaCTX-M genes were characterized more detailed and assigned mainly to CTX-M-groups 1 (85%) and 9 (13%), and one to group 2. Phylogenetic grouping of 80 E. coli isolates showed that most were assigned to group A (71%) and B1 (27%), only one to group D (2%). Genomic fingerprinting and multilocus sequence typing (MLST) showed a high clonal diversity with 41 BOX-types and 19 ST-types. The two most common ST-types were ST410 and ST1210. Antimicrobial susceptibility testing of 46 selected ESBL-producing E. coli revealed that several isolates were additionally resistant to other veterinary relevant antibiotics and some grew on CHROMagar STEC but shiga-like toxine (SLT) genes were not detected. Resistance to carbapenems was not detected. In summary the study showed for the first time the presence of ESBL-producing E. coli in output samples of German biogas plants.
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Affiliation(s)
- Thorsten Schauss
- Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, IFZ-Heinrich-Buff-Ring 26–32, D-35390, Giessen, Germany
| | - Stefanie P. Glaeser
- Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, IFZ-Heinrich-Buff-Ring 26–32, D-35390, Giessen, Germany
- * E-mail: (SPG); (PK)
| | - Alexandra Gütschow
- Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, IFZ-Heinrich-Buff-Ring 26–32, D-35390, Giessen, Germany
| | - Wolfgang Dott
- Institut für Hygiene und Umweltmedizin, Rheinisch-Westfälische Technische Hochschule, D-52057, Aachen, Germany
| | - Peter Kämpfer
- Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, IFZ-Heinrich-Buff-Ring 26–32, D-35390, Giessen, Germany
- * E-mail: (SPG); (PK)
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65
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Wolters B, Kyselková M, Krögerrecklenfort E, Kreuzig R, Smalla K. Transferable antibiotic resistance plasmids from biogas plant digestates often belong to the IncP-1ε subgroup. Front Microbiol 2015; 5:765. [PMID: 25653641 PMCID: PMC4301011 DOI: 10.3389/fmicb.2014.00765] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 12/16/2014] [Indexed: 12/30/2022] Open
Abstract
Manure is known to contain residues of antibiotics administered to farm animals as well as bacteria carrying antibiotic resistance genes (ARGs). These genes are often located on mobile genetic elements. In biogas plants (BGPs), organic substrates such as manure and plant material are mixed and fermented in order to provide energy, and resulting digestates are used for soil fertilization. The fate of plasmid carrying bacteria from manure during the fermentation process is unknown. The present study focused on transferable antibiotic resistance plasmids from digestates of seven BGPs, using manure as a co-substrate, and their phenotypic and genotypic characterization. Plasmids conferring resistance to either tetracycline or sulfadiazine were captured by means of exogenous plasmid isolation from digestates into Pseudomonas putida KT2442 and Escherichia coli CV601 recipients, at transfer frequencies ranging from 10(-5) to 10(-7). Transconjugants (n = 101) were screened by PCR-Southern blot hybridization and real-time PCR for the presence of IncP-1, IncP-1ε, IncW, IncN, IncP-7, IncP-9, LowGC, and IncQ plasmids. While 61 plasmids remained unassigned, 40 plasmids belonged to the IncP-1ε subgroup. All these IncP-1ε plasmids were shown to harbor the genes tet(A), sul1, qacEΔ1, intI1, and integron gene cassette amplicons of different size. Further analysis of 16 representative IncP-1ε plasmids showed that they conferred six different multiple antibiotic resistance patterns and their diversity seemed to be driven by the gene cassette arrays. IncP-1ε plasmids displaying similar restriction and antibiotic resistance patterns were captured from different BGPs, suggesting that they may be typical of this environment. Our study showed that BGP digestates are a potential source of transferable antibiotic resistance plasmids, and in particular the broad host range IncP-1ε plasmids might contribute to the spread of ARGs when digestates are used as fertilizer.
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Affiliation(s)
- Birgit Wolters
- Julius Kühn-Institut, Federal Research Centre for Cultivated Plants (JKI), Institute for Epidemiology and Pathogen Diagnostics Braunschweig, Germany ; Technische Universität Braunschweig, Institute of Environmental and Sustainable Chemistry Braunschweig, Germany
| | - Martina Kyselková
- Biology Centre of the Academy of Sciences of the Czech Republic, Institute of Soil Biology České Budějovice, Czech Republic
| | - Ellen Krögerrecklenfort
- Julius Kühn-Institut, Federal Research Centre for Cultivated Plants (JKI), Institute for Epidemiology and Pathogen Diagnostics Braunschweig, Germany
| | - Robert Kreuzig
- Technische Universität Braunschweig, Institute of Environmental and Sustainable Chemistry Braunschweig, Germany
| | - Kornelia Smalla
- Julius Kühn-Institut, Federal Research Centre for Cultivated Plants (JKI), Institute for Epidemiology and Pathogen Diagnostics Braunschweig, Germany
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Resende J, Diniz C, Silva V, Otenio M, Bonnafous A, Arcuri P, Godon JJ. Dynamics of antibiotic resistance genes and presence of putative pathogens during ambient temperature anaerobic digestion. J Appl Microbiol 2014; 117:1689-99. [DOI: 10.1111/jam.12653] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 09/09/2014] [Accepted: 09/19/2014] [Indexed: 01/25/2023]
Affiliation(s)
- J.A. Resende
- Department of Parasitology, Microbiology and Immunology; Institute of Biological Sciences; Federal University of Juiz de Fora; Juiz de Fora Brazil
- INRA-Institute National Recherche Agronomique; Laboratoire de Biotechnologie de l'Environnement; Narbonne France
| | - C.G. Diniz
- Department of Parasitology, Microbiology and Immunology; Institute of Biological Sciences; Federal University of Juiz de Fora; Juiz de Fora Brazil
| | - V.L. Silva
- Department of Parasitology, Microbiology and Immunology; Institute of Biological Sciences; Federal University of Juiz de Fora; Juiz de Fora Brazil
| | - M.H. Otenio
- EMBRAPA Dairy Cattle-Brazilian Agricultural Research Corporation; Juiz de Fora Brazil
| | - A. Bonnafous
- INRA-Institute National Recherche Agronomique; Laboratoire de Biotechnologie de l'Environnement; Narbonne France
| | - P.B. Arcuri
- EMBRAPA Brazilian Agricultural Research Corporation; Secretariat for International Relations, Headquarters; Brasilia Brazil
| | - J.-J. Godon
- INRA-Institute National Recherche Agronomique; Laboratoire de Biotechnologie de l'Environnement; Narbonne France
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Lu X, Zhen G, Liu Y, Hojo T, Estrada AL, Li YY. Long-term effect of the antibiotic cefalexin on methane production during waste activated sludge anaerobic digestion. BIORESOURCE TECHNOLOGY 2014; 169:644-651. [PMID: 25105270 DOI: 10.1016/j.biortech.2014.07.056] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 07/13/2014] [Accepted: 07/14/2014] [Indexed: 06/03/2023]
Abstract
Long-term experiments herein were conducted to investigate the effect of cefalexin (CLX) on methane production during waste activated sludge (WAS) anaerobic digestion. CLX exhibited a considerable inhibition in methane production during the initial 25 days while the negative effect attenuated subsequently and methane production recovered depending on CLX doses used (600 and 1000 mg/L). The highest methane yield reached 450 mL at 1000 mg-CLX/L after 157 days of digestion, 63.8% higher than CLX-free one. Stimulated excretion of extracellular polymeric substances (EPS) by CLX served as microbial protecting layers, creating a suitable environment for microbes' growth and fermentation. Further examination via ultraviolet visible (UV-Vis) spectra also verified the elevated slime EPS, LB-EPS and TB-EPS indicated by UV-254 in the presence of CLX. Unlike the commonly accepted adverse effect, this study demonstrated the beneficial role of CLX in methane production, providing new insights into its true environmental impacts.
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Affiliation(s)
- Xueqin Lu
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan.
| | - Guangyin Zhen
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan; National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, Ibaraki 305-0053, Japan.
| | - Yuan Liu
- Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8579, Japan
| | - Toshimasa Hojo
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan
| | | | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan; Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8579, Japan.
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Escherichia coli persistence kinetics in dairy manure at moderate, mesophilic, and thermophilic temperatures under aerobic and anaerobic environments. Bioprocess Biosyst Eng 2014; 38:457-67. [DOI: 10.1007/s00449-014-1285-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 09/06/2014] [Indexed: 10/24/2022]
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