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Espinosa MF, Verbyla ME, Vassalle L, Leal C, Leroy-Freitas D, Machado E, Fernandes L, Rosa-Machado AT, Calábria J, Chernicharo C, Mota Filho CR. Reduction and liquid-solid partitioning of SARS-CoV-2 and adenovirus throughout the different stages of a pilot-scale wastewater treatment plant. WATER RESEARCH 2022; 212:118069. [PMID: 35077942 PMCID: PMC8759026 DOI: 10.1016/j.watres.2022.118069] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 01/05/2022] [Accepted: 01/11/2022] [Indexed: 05/04/2023]
Abstract
Investigating waterborne viruses is of great importance to minimizing risks to public health. Viruses tend to adsorb to sludge particles from wastewater processes by electrostatic and hydrophobic interactions between virus, aquatic matrix, and particle surface. Sludge is often re-used in agriculture; therefore, its evaluation is also of great interest to public health. In the present study, a pilot scale system treating real domestic wastewater from a large city in Brazil was used to evaluate the removal, the overall reduction, and liquid-solid partitioning of human adenovirus (HAdV), the novel coronavirus (SARS-CoV-2) and fecal indicators (F-specific coliphages and E. coli). The system consists of a high-rate algal pond (HRAP) post-treating the effluent of an upflow anaerobic sludge blanket (UASB) reactor. Samples were collected from the influent and effluent of each unit, as well as from the sludge of the UASB and from the microalgae biomass in the HRAP. Pathogens and indicators were quantified by quantitative polymerase chain reaction (qPCR) (for HAdV), qPCR with reverse transcription (RTqPCR) (for SARS-CoV-2), the double agar plaque assay (for coliphages), and the most probable number (MPN) method (for E. coli). The removal and overall reduction of HAdV and SARS-CoV-2 was greater than 1-log10. Almost 60% of remaining SARS-CoV-2 RNA and more than 70% of remaining HAdV DNA left the system in the sludge, demonstrating that both viruses may have affinity for solids. Coliphages showed a much lower affinity to solids, with only 3.7% leaving the system in the sludge. The system performed well in terms of the removal of organic matter and ammoniacal nitrogen, however tertiary treatment would be necessary to provide further pathogen reduction, if the effluent is to be reused in agriculture. To our knowledge, this is the first study that evaluated the reduction and partitioning of SARS-CoV-2 and HAdV through the complete cycle of a wastewater treatment system consisting of a UASB reactor followed by HRAPs.
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Affiliation(s)
| | | | - Lucas Vassalle
- Federal University of Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | - Cintia Leal
- Federal University of Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | | | - Elayne Machado
- Federal University of Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | - Luyara Fernandes
- Federal University of Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | | | - Juliana Calábria
- Federal University of Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | - Carlos Chernicharo
- Federal University of Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil
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Janousek S, Vlkova A, Jirova G, Kejlova K, Krsek D, Jirova D, Kandarova H, Wittlingerova Z, Heinonen T, Mannerstrom M, Maly M. Qualitative and Quantitative Analysis of Certain Aspects of the Cytotoxic and Genotoxic Hazard of Hospital Wastewaters by Using a Range of In Vitro Assays. Altern Lab Anim 2021; 49:33-48. [PMID: 33910377 DOI: 10.1177/02611929211004956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Health care facilities and hospitals generate significant amounts of wastewater which are released into the sewage system, either after a preliminary treatment or without any further treatment. Hospital wastewater may contain large amounts of hazardous chemicals and pharmaceuticals, some of which cannot be eliminated entirely by wastewater treatment plants. Moreover, hospital effluents may be loaded with a plethora of pathogenic microorganisms or other microbiota and microbiome residues. The need to monitor hospital effluents for their genotoxic hazard is of high importance, as detailed information is scarce. DNA-based information can be acquired directly from samples through the application of various molecular methods, while cell-based biomonitoring assays can provide important information about impaired cellular pathways or mechanisms of toxicity without prior knowledge of the identity of each toxicant. In our study, we evaluated samples of chlorinated hospital wastewater discharged into the sewage system after this disinfection process. The assessment of cytotoxicity, genotoxicity and mutagenicity of the hospital effluents was performed in vitro by using a broad battery of biomonitoring assays that are relevant for human health effects. All the tested hospital wastewater samples could be classified as potentially genotoxic, and it is concluded that the microbiota present in hospital wastewater might contribute to this genotoxic potential.
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Affiliation(s)
- Stanislav Janousek
- Centre of Toxicology and Health Safety, 37739National Institute of Public Health, Prague, Czech Republic
| | - Alena Vlkova
- Centre of Toxicology and Health Safety, 37739National Institute of Public Health, Prague, Czech Republic.,Faculty of Environmental Sciences, 48371Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Gabriela Jirova
- Centre of Toxicology and Health Safety, 37739National Institute of Public Health, Prague, Czech Republic.,Faculty of Environmental Sciences, 48371Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Kristina Kejlova
- Centre of Toxicology and Health Safety, 37739National Institute of Public Health, Prague, Czech Republic
| | - Daniel Krsek
- Centre of Toxicology and Health Safety, 37739National Institute of Public Health, Prague, Czech Republic
| | - Dagmar Jirova
- Centre of Toxicology and Health Safety, 37739National Institute of Public Health, Prague, Czech Republic
| | - Helena Kandarova
- Centre of Experimental Medicine, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Zdenka Wittlingerova
- Faculty of Environmental Sciences, 48371Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Tuula Heinonen
- FICAM, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Marika Mannerstrom
- FICAM, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Marek Maly
- Centre of Toxicology and Health Safety, 37739National Institute of Public Health, Prague, Czech Republic
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Rahmani F, Hmaied F, Matei I, Chirila F, Fit N, Yahya M, Jebri S, Amairia S, Hamdi M. Occurrence of Staphylococcus spp. and investigation of fecal and animal viral contaminations in livestock, river water, and sewage from Tunisia and Romania. ENVIRONMENTAL MONITORING AND ASSESSMENT 2020; 192:206. [PMID: 32124087 DOI: 10.1007/s10661-020-8172-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 02/18/2020] [Indexed: 06/10/2023]
Abstract
The objective of this study was to determine the occurrence of Staphylococcus spp., Escherichia coli, somatic coliphages, F-specific RNA bacteriophages, hepatitis E virus (HEV), and bovine enterovirus (BEV) in fecal and water samples. The occurrence of Staphylococcus spp. was investigated in treated wastewater samples collected from slaughterhouse of Tunisia. Results showed that Staphylococcus spp. were detected in the totality of collected samples with an average mean of 5.44 Log10 (CFU/100 ml). Regarding fecal indicator bacteria, E. coli was detected in the totality of water samples and was more abundant in Tunisian samples than in samples collected from Romania (P < 0.05). Concerning somatic coliphages and F-specific RNA bacteriophages used as viral indicators, they were detected in all raw and treated wastewaters. Bovine enterovirus (BEV) was detected in 20.1% and 28% of bovine stool samples collected from Tunisia and Romania, respectively. BEV was also detected in 60% of porcine stool samples from Romania. BEV was absent in all treated sewage samples. HEV was detected in raw sewage and bovine fecal sample from Romania with low occurrence and none sample from Tunisia was positive. This study may give us an insight into the monitoring of water quality in Tunisia and Romania.
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Affiliation(s)
- Faten Rahmani
- Laboratoire Biotechnologies et Technologie Nucléaire, CNSTN, Pôle Technologique Sidi Thabet, 2020, Sidi Thabet, Tunisia
- Faculté des Sciences de Tunis, Université El Manar, Tunis, Tunisia
| | - Fatma Hmaied
- Laboratoire Biotechnologies et Technologie Nucléaire, CNSTN, Pôle Technologique Sidi Thabet, 2020, Sidi Thabet, Tunisia.
| | - Ioana Matei
- Department of Microbiology, Faculty of Veterinary Medecine, University Agricultural Sciences and Veterinary Medecine, 3-5 Mănăştur Street, 400372, Cluj-Napoca, Romania
| | - Flore Chirila
- Department of Microbiology, Faculty of Veterinary Medecine, University Agricultural Sciences and Veterinary Medecine, 3-5 Mănăştur Street, 400372, Cluj-Napoca, Romania
| | - Nicodim Fit
- Department of Microbiology, Faculty of Veterinary Medecine, University Agricultural Sciences and Veterinary Medecine, 3-5 Mănăştur Street, 400372, Cluj-Napoca, Romania
| | - Mariem Yahya
- Laboratoire Biotechnologies et Technologie Nucléaire, CNSTN, Pôle Technologique Sidi Thabet, 2020, Sidi Thabet, Tunisia
| | - Sihem Jebri
- Laboratoire Biotechnologies et Technologie Nucléaire, CNSTN, Pôle Technologique Sidi Thabet, 2020, Sidi Thabet, Tunisia
| | - Safa Amairia
- Laboratoire de Parasitologie, Univ. Manouba, École Nationale de Médecine Vétérinaire de Sidi Thabet, 2020, Sidi Thabet, Tunisia
| | - Moktar Hamdi
- Laboratoire d'Ecologie et de Technologie Microbienne, Institut National Sciences Appliquées de Tunis, Université de Carthage, BP 676, 1080, Tunis, Tunisia
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Fan N, Yang M, Jin R, Qi R. Isolation and Genomic Characterization of an Acinetobacter johnsonii Bacteriophage AJO2 From Bulking Activated Sludge. Front Microbiol 2019; 10:266. [PMID: 30873130 PMCID: PMC6401600 DOI: 10.3389/fmicb.2019.00266] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 02/01/2019] [Indexed: 11/13/2022] Open
Abstract
A novel Podoviridae lytic phage AJO2, specifically infecting Acinetobacter johnsonii, was isolated from bulking activated sludge. The one-step growth experiment showed that the latent period and burst size of AJO2 were estimated to be 30 min and 78.1 phages per infected cell, respectively. The viability test indicated that neutral conditions (pH 6-8) were table for AJO2 survival, while it was sensitive to high temperature (≥60°C) and ultraviolet treatment (254 nm). Genomic sequencing revealed that the AJO2 had a linearly permuted, double-stranded (ds) DNA consisting of 38,124 bp, with the G+C content of 41 mol%. A total of 58 putative open reading frames (ORFs), 11 pairs of repeats and 11 promoters were identified. The AJO2 genome had a modular gene structure which shared some similarities to those of A. baumanii phages. However, genomic comparative analysis revealed many differences among them, and novel genes were identified in the AJO2 genome. These results contribute to subsequent researches on the interaction between bacteriophages and hosts in wastewater treatment, especially during the bulking period. Additionally, the newly isolated phage could be a good candidate as a therapeutic agent to control nosocomial infections caused by A. johnsonii.
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Affiliation(s)
- Niansi Fan
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Min Yang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Rencun Jin
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - Rong Qi
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, University of Chinese Academy of Sciences, Beijing, China
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Ye M, Sun M, Zhao Y, Jiao W, Xia B, Liu M, Feng Y, Zhang Z, Huang D, Huang R, Wan J, Du R, Jiang X, Hu F. Targeted inactivation of antibiotic-resistant Escherichia coli and Pseudomonas aeruginosa in a soil-lettuce system by combined polyvalent bacteriophage and biochar treatment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 241:978-987. [PMID: 30029332 DOI: 10.1016/j.envpol.2018.04.070] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 04/14/2018] [Accepted: 04/16/2018] [Indexed: 06/08/2023]
Abstract
High abundances of antibiotic-resistant pathogenic bacteria (ARPB) and antibiotic resistance genes (ARGs) in agricultural soil-plant systems have become serious threats to human health and environmental safety. Therefore, it is crucial to develop targeted technology to control existing antibiotic resistance (AR) contamination and potential dissemination in soil-plant systems. In this work, polyvalent bacteriophage (phage) therapy and biochar amendment were applied separately and in combination to stimulate ARPB/ARG dissipation in a soil-lettuce system. With combined application of biochar and polyvalent phage, the abundance of Escherichia coli K-12 (tetR) and Pseudomonas aeruginosa PAO1 (ampR + fosR) and their corresponding ARGs (tetM, tetQ, tetW, ampC, and fosA) significantly decreased in the soil after 63 days' incubation (p < 0.05). Similar results for endophytic K-12 and PAO1, and ARGs, were also obtained in lettuce tissues following combined treatment. Additionally, high throughput sequencing revealed that biochar and polyvalent phage synergetically improved the structural diversity and functional stability of the indigenous bacterial communities in soil and the endophytic ones in lettuce. Hence, this work proposes a novel biotechnology that combines biochar amendment and polyvalent phage therapy to achieve targeted inactivation of ARPB, which stimulates ARG dissipation in soil-lettuce systems.
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Affiliation(s)
- Mao Ye
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Mingming Sun
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yuanchao Zhao
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wentao Jiao
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
| | - Bing Xia
- Anhui Academy of Environmental Science Research, Hefei, 230022, China
| | - Manqiang Liu
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yanfang Feng
- Anhui Academy of Environmental Science Research, Hefei, 230022, China
| | - Zhongyun Zhang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Dan Huang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Rong Huang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Jinzhong Wan
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Ruijun Du
- Nanjing Institute of Environmental Science, Ministry of Environmental Protection of China, Nanjing, 210042, China
| | - Xin Jiang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
| | - Feng Hu
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
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Lood R, Ertürk G, Mattiasson B. Revisiting Antibiotic Resistance Spreading in Wastewater Treatment Plants - Bacteriophages as a Much Neglected Potential Transmission Vehicle. Front Microbiol 2017; 8:2298. [PMID: 29209304 PMCID: PMC5702337 DOI: 10.3389/fmicb.2017.02298] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 11/07/2017] [Indexed: 12/28/2022] Open
Abstract
The spread of antibiotic resistance is currently a major threat to health that humanity is facing today. Novel multidrug and pandrug resistant bacteria are reported on a yearly basis, while the development of novel antibiotics is lacking. Focus to limit the spread of antibiotic resistance by reducing the usage of antibiotics in health care, veterinary applications, and meat production, have been implemented, limiting the exposure of pathogens to antibiotics, thus lowering the selection of resistant strains. Despite these attempts, the global resistance has increased significantly. A recent area of focus has been to limit the spread of resistance through wastewater treatment plants (WWTPs), serving as huge reservoirs of microbes and resistance genes. While being able to quite efficiently reduce the presence of resistant bacteria entering any of the final products of WWTPs (e.g., effluent water and sludge), the presence of resistance genes in other formats (mobile genetic elements, bacteriophages) has mainly been ignored. Recent data stress the importance of transduction in WWTPs as a mediator of resistance spread. Here we examine the current literature in the role of WWTPs as reservoirs and hotspots of antibiotic resistance with a specific focus on bacteriophages as mediators of genetic exchange.
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Affiliation(s)
- Rolf Lood
- Department of Clinical Sciences, Division of Infection Medicine, Lund University, Lund, Sweden
| | - Gizem Ertürk
- Department of Clinical Sciences, Division of Infection Medicine, Lund University, Lund, Sweden
| | - Bo Mattiasson
- Department of Biotechnology, Lund University, Lund, Sweden
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