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S V, T J, E AP, A MHA. Antibiotic resistance of heterotrophic bacteria from the sediments of adjoining high Arctic fjords, Svalbard. Braz J Microbiol 2024:10.1007/s42770-024-01368-0. [PMID: 38767750 DOI: 10.1007/s42770-024-01368-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 04/08/2024] [Indexed: 05/22/2024] Open
Abstract
Antibiotic resistance bacteria (ARB) and antibiotic resistance genes (ARGs) are now considered major global threats. The Kongsfjorden and Krossfjorden are the interlinked fjords in the Arctic that are currently experiencing the effects of climate change and receiving input of pollutants from distant and regional sources. The present study focused on understanding the prevalence of antibiotic resistance of retrievable heterotrophic bacteria from the sediments of adjacent Arctic fjords Kongsfjorden and Krossfjorden. A total of 237 bacterial isolates were tested against 16 different antibiotics. The higher resistance observed towards Extended Spectrum β-lactam antibiotic (ESBL) includes ceftazidime (45.56%) followed by trimethoprim (27%) and sulphamethizole (24.05%). The extent of resistance was meagre against tetracycline (2.53%) and gentamycin (2.95%). The 16S rRNA sequencing analysis identified that Proteobacteria (56%) were the dominant antibiotic resistant phyla, followed by Firmicutes (35%), Actinobacteria (8%) and Bacteroidetes. The dominant resistant bacterial isolates are Bacillus cereus (10%), followed by Alcaligenes faecalis (6.47%), Cytobacillus firmus (5.75%) Salinibacterium sp. (5%) and Marinobacter antarcticus (5%). Our study reveals the prevalence of antibiotic resistance showed significant differences in both the inner and outer fjords of Kongsfjorden and Krossfjorden (p < 0.05). This may be the input of antibiotic resistance bacteria released into the fjords from the preserved permafrost due to the melting of glaciers, horizontal gene transfer, and human influence in the Arctic region act as a selection pressure for the development and dissemination of more antibiotic resistant bacteria in Arctic fjords.
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Affiliation(s)
- Vishnupriya S
- Department of Marine Biology, Microbiology, Biochemistry, School of Marine Sciences, Cochin University of Science and Technology (CUSAT), Kochi, India.
| | - Jabir T
- National Centre for Polar and Ocean Research, Ministry of Earth Sciences, Headland Sada, 403 804, Vasco- da-Gama, Goa, India
| | - Akhil Prakash E
- Department of Marine Biology, Microbiology, Biochemistry, School of Marine Sciences, Cochin University of Science and Technology (CUSAT), Kochi, India
| | - Mohamed Hatha A A
- Department of Marine Biology, Microbiology, Biochemistry, School of Marine Sciences, Cochin University of Science and Technology (CUSAT), Kochi, India
- CUSAT NCPOR Centre for Polar Sciences, School of Marine Sciences, Cochin University of Science and Technology (CUSAT), Kochi, India
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2
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Yang T, Wang X, Jiang L, Sui X, Bi X, Jiang B, Zhang Z, Li X. Antibiotic resistance genes associated with size-segregated bioaerosols from wastewater treatment plants: A review. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 343:123169. [PMID: 38128715 DOI: 10.1016/j.envpol.2023.123169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/23/2023] [Accepted: 12/13/2023] [Indexed: 12/23/2023]
Abstract
The antibiotic-resistant pollution in size-segregated bioaerosols from wastewater treatment plants (WWTPs) is of increasing concern due to its public health risks, but an elaborate review is still lacking. This work overviewed the profile, mobility, pathogenic hosts, source, and risks of antibiotic resistance genes (ARGs) in size-segregated bioaerosols from WWTPs. The dominant ARG type in size-segregated bioaerosols from WWTPs was multidrug resistance genes. Treatment units that equipped with mechanical facilities and aeration devices, such as grilles, grit chambers, biochemical reaction tanks, and sludge treatment units, were the primary sources of bioaerosol antibiotic resistome in WWTPs. Higher enrichment of antibiotic resistome in particulate matter with an aerodynamic diameter of <2.5 μm, was found along the upwind-downwind-WWTPs gradient. Only a small portion of ARGs in inhalable bioaerosols from WWTPs were flanked by mobile genetic elements. The pathogens with multiple drug resistance had been found in size-segregated bioaerosols from WWTPs. Different ARGs or antibiotic resistant bacteria have different aerosolization potential associated with bioaerosols from various treatment processes. The validation of pathogenic antibiotic resistance bacteria, deeper investigation of ARG mobility, emission mechanism of antibiotic resistome, and development of treatment technologies, should be systematically considered in future.
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Affiliation(s)
- Tang Yang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China.
| | - Xuyi Wang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China.
| | - Lu Jiang
- College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao, 266100, PR China.
| | - Xin Sui
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China.
| | - Xuejun Bi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China.
| | - Bo Jiang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China.
| | - Zhanpeng Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China.
| | - Xinlong Li
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China.
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3
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La Manna P, De Carluccio M, Oliva G, Vigliotta G, Rizzo L. Urban wastewater disinfection by iron chelates mediated solar photo-Fenton: Effects on seven pathogens and antibiotic resistance transfer potential. WATER RESEARCH 2024; 249:120966. [PMID: 38070340 DOI: 10.1016/j.watres.2023.120966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 10/25/2023] [Accepted: 12/01/2023] [Indexed: 01/03/2024]
Abstract
The effects of solar photo-Fenton (SPF) process mediated by the iron chelate Fe3+ imminodisuccinic acid (Fe:IDS) on both the inactivation of seven relevant pathogens and the potential for antibiotic resistance transfer (degradation of antibiotic resistance genes (ARGs) and after treatment regrowth), in real secondary treated urban wastewater, were investigated for the first time. A comparison with results obtained by sunlight/H2O2 process and Fe3+ ethylenediaminedisuccinic acid (Fe:EDDS) SPF was also carried out. ARGs were quantified by polymerase chain reaction (PCR) in samples before and after (3 h) the treatment. The persistence of the selected pathogens and ARGs was also evaluated in regrowth tests (72 h) under environmentally mimicking conditions. Fe:IDS SPF resulted to be more effective (from 1.4 log removal for Staphylococcus spp. to 4.3 log removal for Escherichia coli) than Fe:EDDS SPF (from 0.8 log removal for Pseudomonas aeruginosa to 2.0 log removal for Total coliphages) and sunlight/H2O2 (from 1.2 log removal for Clostridium perfringens to 3.3 log removal for E. coli) processes for the seven pathogens investigated. Potential pathogens regrowth was also severely affected, as no substantial regrowth was observed, both in presence and absence of catalase. A similar trend was observed for ARGs removal too (until 0.001 fold change expression for qnrS after 3 h). However, a poor effect and a slight increase in fold change was observed after treatment especially for gyrA, mefA and intl1. Overall, the effect of the investigated processes on ARGs was found to be ARG dependent. Noteworthy, coliphages can regrow after sunlight/H2O2 treatment unlike SPF processes, increasing the risk of antibiotic resistance transfer by transduction mechanism. In conclusion, Fe:IDS SPF is an attractive solution for tertiary treatment of urban wastewater in small wastewater treatment plants as it can provide effective disinfection and a higher protection against antibiotic resistance transfer than the other investigated processes.
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Affiliation(s)
- Pellegrino La Manna
- Water Science and Technology group (WaSTe), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Marco De Carluccio
- Water Science and Technology group (WaSTe), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Gianmaria Oliva
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Giovanni Vigliotta
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Luigi Rizzo
- Water Science and Technology group (WaSTe), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy.
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Zhang S, Li T, Hu J, Li K, Liu D, Li H, Wang F, Chen D, Zhang Z, Fan Q, Cui X, Che R. Reforestation substantially changed the soil antibiotic resistome and its relationships with metal resistance genes, mobile genetic elements, and pathogens. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 342:118037. [PMID: 37178462 DOI: 10.1016/j.jenvman.2023.118037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/13/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023]
Abstract
Revealing the effects of reforestation on soil antibiotic resistome is essential for assessing ecosystem health, yet related studies remain scarce. Here, to determine the responses of the soil antibiotic resistome to reforestation, 30 pairs of cropland and forest soil samples were collected from southwestern China, a region with high environmental heterogeneity. All the forests had been derived from croplands more than one decade ago. The diversity and abundance of soil antibiotic resistance genes (ARGs), metal resistance genes (MRGs), mobile genetic elements (MGEs), and pathogens were determined by metagenomic sequencing and real-time PCR. The results showed that reforestation significantly increased soil microbial abundance and the contents of Cu, total carbon, total nitrogen, total organic carbon, and ammonium nitrogen. Nevertheless, it decreased the contents of soil Zn, Ba, nitrate nitrogen, and available phosphorus. The main soil ARGs identified in this region were vancomycin, multidrug, and bacitracin resistance genes. Reforestation significantly increased the soil ARG abundance by 62.58%, while it decreased the ARG richness by 16.50%. Reforestation exerted no significant effects on the abundance of heavy metal resistance genes and pathogens, but it doubled the abundance of MGEs. Additionally, reforestation substantially decreased the co-occurrence frequencies of ARGs with MRGs and pathogens. In contrast, the correlation between ARGs and MGEs was greatly enhanced by reforestation. Similarly, the correlations between soil ARG abundance and environmental factors were also strengthened by reforestation. These findings suggest that reforestation can substantially affect the soil antibiotic resistome and exerts overall positive effects on soil health by decreasing ARG richness, providing critical information for assessing the effects of "grain for green" project on soil health.
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Affiliation(s)
- Song Zhang
- Institute of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Yunnan University, Kunming, 650500, China; State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Ting Li
- Institute of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Yunnan University, Kunming, 650500, China; College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jinming Hu
- Institute of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Yunnan University, Kunming, 650500, China
| | - Kexin Li
- Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China
| | - Dong Liu
- School of Life Sciences, Yunnan University, Kunming, 650091, China
| | - Haixia Li
- Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - Fang Wang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Danhong Chen
- Institute of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Yunnan University, Kunming, 650500, China
| | - Zejin Zhang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qiuping Fan
- Institute of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Yunnan University, Kunming, 650500, China
| | - Xiaoyong Cui
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Rongxiao Che
- Institute of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Yunnan University, Kunming, 650500, China.
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Gan C, Langa E, Valenzuela A, Ballestero D, Pino-Otín MR. Synergistic Activity of Thymol with Commercial Antibiotics against Critical and High WHO Priority Pathogenic Bacteria. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12091868. [PMID: 37176927 PMCID: PMC10180827 DOI: 10.3390/plants12091868] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/28/2023] [Accepted: 04/29/2023] [Indexed: 05/15/2023]
Abstract
The use of synergistic combinations between natural compounds and commercial antibiotics may be a good strategy to fight against microbial resistance, with fewer side effects on human, animal and environmental, health. The antimicrobial capacity of four compounds of plant origin (thymol and gallic, salicylic and gentisic acids) was analysed against 14 pathogenic bacteria. Thymol showed the best antimicrobial activity, with MICs ranging from 125 µg/mL (for Acinetobacter baumannii, Pasteurella aerogenes, and Salmonella typhimurium) to 250 µg/mL (for Bacillus subtilis, Klebsiella aerogenes, Klebsiella pneumoniae, Serratia marcescens, Staphylococcus aureus, and Streptococcus agalactiae). Combinations of thymol with eight widely used antibiotics were studied to identify combinations with synergistic effects. Thymol showed synergistic activity with chloramphenicol against A. baumannii (critical priority by the WHO), with streptomycin and gentamicin against Staphylococcus aureus (high priority by the WHO), and with streptomycin against Streptococcus agalactiae, decreasing the MICs of these antibiotics by 75% to 87.5%. The kinetics of these synergies indicated that thymol alone at the synergy concentration had almost no effect on the maximum achievable population density and very little effect on the growth rate. However, in combination with antibiotics at the same concentration, it completely inhibited growth, confirming its role in facilitating the action of the antibiotic. The time-kill curves indicated that all the combinations with synergistic effects were mainly bactericidal.
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Affiliation(s)
- Cristina Gan
- Faculty of Health Sciences, Universidad San Jorge, 50830 Villanueva de Gállego, Zaragoza, Spain
| | - Elisa Langa
- Faculty of Health Sciences, Universidad San Jorge, 50830 Villanueva de Gállego, Zaragoza, Spain
| | - Antonio Valenzuela
- Faculty of Health Sciences, Universidad San Jorge, 50830 Villanueva de Gállego, Zaragoza, Spain
| | - Diego Ballestero
- Faculty of Health Sciences, Universidad San Jorge, 50830 Villanueva de Gállego, Zaragoza, Spain
| | - M Rosa Pino-Otín
- Faculty of Health Sciences, Universidad San Jorge, 50830 Villanueva de Gállego, Zaragoza, Spain
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6
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Berman TS, Barnett-Itzhaki Z, Berman T, Marom E. Antimicrobial resistance in food-producing animals: towards implementing a one health based national action plan in Israel. Isr J Health Policy Res 2023; 12:18. [PMID: 37101188 PMCID: PMC10132406 DOI: 10.1186/s13584-023-00562-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 04/01/2023] [Indexed: 04/28/2023] Open
Abstract
BACKGROUND Development of antimicrobial resistance poses a major threat to human and animal health worldwide. Antimicrobials are frequently used in animal husbandry, making food-producing animals a widespread and important source of antimicrobial resistance. Indeed, recent evidence demonstrates that antimicrobial resistance in food-producing animals poses a threat to the health of humans, animals and the environment. To address this threat, national action plans have been implemented based on a 'One Health' approach, which integrates actions across human and animal health sectors to combat antimicrobial resistance. Although under development, Israel has yet to publish a national action plan against antimicrobial resistance, despite alarming findings of resistant bacteria in food-producing animals in the country. Here we review several national action plans against antimicrobial resistance around the world in order to suggest approaches to develop a national action plan in Israel. MAIN BODY We investigated worldwide national action plans against antimicrobial resistance based on a 'One Health' approach. We also conducted interviews with representatives of relevant Israeli ministries to understand antimicrobial resistance policy and regulatory frameworks in Israel. Finally, we present recommendations for Israel towards implementing a 'One Health' national action plan against antimicrobial resistance. Many countries have developed such plans, however, only a few are currently funded. Furthermore, many countries, especially in Europe, have taken action to reduce the use of antimicrobials and the spread of antimicrobial resistance in food-producing animals by banning the use of antimicrobials to promote growth, reporting data on the use and sales of antimicrobials in food-producing animals, operating centralized antimicrobial resistance surveillance systems and preventing the use of antimicrobials important to human medicine to treat food-producing animals. CONCLUSIONS Without a comprehensive and funded national action plan, the risks of antimicrobial resistance to the public health in Israel will escalate. Thus, several actions should be considered: (1) Reporting data on the use of antimicrobials in humans and animals. (2) Operating a centralized surveillance system for antimicrobial resistance in humans, animals and the environment. (3) Improving awareness regarding antimicrobial resistance in the general public and in health practitioners from both human and animal sectors. (4) Composing a list of critically important antimicrobials to human medicine that's use should be avoided in food-producing animals. (5) Enforcing best practices of antimicrobial use at the farm-level. (6) Reducing incidence of infection through farm biosecurity. (7) Supporting research and development of new antimicrobial treatments, vaccines and diagnostic tools.
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Affiliation(s)
- Tali Sarah Berman
- Mimshak, The Israel Society of Ecology and Environmental Sciences, 19 Kehilat New York St, Tel Aviv, Israel.
- Public Health Services, Ministry of Health, 39 Yirmiyahu St, Jerusalem, Israel.
- Department of Entomology, Newe Ya'ar Research Center, ARO, Ramat Yishai, Israel.
| | - Zohar Barnett-Itzhaki
- Ruppin Research Group in Environmental and Social Sustainability, Ruppin Academic Center, 4025000, Emek Hefer, Israel
| | - Tamar Berman
- Public Health Services, Ministry of Health, 39 Yirmiyahu St, Jerusalem, Israel
| | - Eli Marom
- Public Health Services, Ministry of Health, 39 Yirmiyahu St, Jerusalem, Israel
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Pradier L, Bedhomme S. Ecology, more than antibiotics consumption, is the major predictor for the global distribution of aminoglycoside-modifying enzymes. eLife 2023; 12:77015. [PMID: 36785930 PMCID: PMC9928423 DOI: 10.7554/elife.77015] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 01/24/2023] [Indexed: 02/15/2023] Open
Abstract
Antibiotic consumption and its abuses have been historically and repeatedly pointed out as the major driver of antibiotic resistance emergence and propagation. However, several examples show that resistance may persist despite substantial reductions in antibiotic use, and that other factors are at stake. Here, we study the temporal, spatial, and ecological distribution patterns of aminoglycoside resistance, by screening more than 160,000 publicly available genomes for 27 clusters of genes encoding aminoglycoside-modifying enzymes (AME genes). We find that AME genes display a very ubiquitous pattern: about 25% of sequenced bacteria carry AME genes. These bacteria were sequenced from all the continents (except Antarctica) and terrestrial biomes, and belong to a wide number of phyla. By focusing on European countries between 1997 and 2018, we show that aminoglycoside consumption has little impact on the prevalence of AME-gene-carrying bacteria, whereas most variation in prevalence is observed among biomes. We further analyze the resemblance of resistome compositions across biomes: soil, wildlife, and human samples appear to be central to understand the exchanges of AME genes between different ecological contexts. Together, these results support the idea that interventional strategies based on reducing antibiotic use should be complemented by a stronger control of exchanges, especially between ecosystems.
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Affiliation(s)
- Léa Pradier
- CEFE, CNRS, Univ Montpellier, EPHE, IRD, Montpellier, France
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The Resistome of ESKAPEE Pathogens in Untreated and Treated Wastewater: A Polish Case Study. Biomolecules 2022; 12:biom12081160. [PMID: 36009054 PMCID: PMC9405806 DOI: 10.3390/biom12081160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/11/2022] [Accepted: 08/19/2022] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to quantify ESKAPEE bacteria, genes encoding resistance to antibiotics targeting this group of pathogens, as well as integrase genes in municipal wastewater and river water. Environmental DNA was extracted from the collected samples and used in deep sequencing with the Illumina TruSeq kit. The abundance of bacterial genera and species belonging to the ESKAPEE group, 400 ARGs associated with this microbial group, and three classes of integrase genes were determined. A taxonomic analysis revealed that Acinetobacter was the dominant bacterial genus, whereas Acinetobacter baumannii and Escherichia coli were the dominant bacterial species. The analyzed samples were characterized by the highest concentrations of the following ARGs: blaGES, blaOXA-58, blaTEM, qnrB, and qnrS. Acinetobacter baumannii, E. coli, and genes encoding resistance to β-lactams (blaVEB-1, blaIMP-1, blaGES, blaOXA-58, blaCTX-M, and blaTEM) and fluoroquinolones (qnrS) were detected in samples of river water collected downstream from the wastewater discharge point. The correlation analysis revealed a strong relationship between A. baumannii (bacterial species regarded as an emerging human pathogen) and genes encoding resistance to all tested groups of antimicrobials. The transmission of the studied bacteria (in particular A. baumannii) and ARGs to the aquatic environment poses a public health risk.
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Antibiotic Resistance of Bacterial Isolates from Smallholder Poultry Droppings in the Guinea Savanna Zone of Nigeria. Antibiotics (Basel) 2022; 11:antibiotics11070973. [PMID: 35884227 PMCID: PMC9311501 DOI: 10.3390/antibiotics11070973] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/15/2022] [Accepted: 04/21/2022] [Indexed: 02/06/2023] Open
Abstract
There is a growing risk of antibiotic resistance (AR) in smallholder poultry (SP). This study, therefore, aimed to investigate AR pattern of bacterial isolates from SP in the Guinea Savanna agro-ecological zone of Nigeria. A total of 120 fresh poultry droppings were aseptically collected, randomly, from two tropically adapted (FUNAAB Alpha and Noiler) and local chickens. The chickens were raised either using ethnoveterinary medicines (n = 60) or antibiotics (n = 60). Bacterial isolates were characterized and analyzed using standard protocols, and appropriate statistical tools. Compared to Pseudomonas spp. (2.5%) and Klebsiella spp. (5.8%), Salmonella spp. (57.5%) and Escherichia coli (34.2%) were the most prevalent (χ2 = 96.67; p < 0.001). Prevalence of bacterial species was significantly (p = 0.024; Odds Ratio = 2.552) influenced by antibiotics usage. All four species were multi-drug resistant. In total, 30% of the isolates had a multiple AR index ≥ 0.2. Bacterial isolates from FUNAAB Alpha (58.0%) and Noiler (44.0%) were highly resistant to quinolones, while isolates from the local chickens (22.6%) were most resistant to aminoglycosides. Bacterial species isolated from FUNAAB Alpha and local chickens exhibited the lowest and highest percentage of AR, respectively. Clustering of isolates with similar antibiogram revealed inter-species dependence with possibility for inter-species gene transfer. These findings provide a background to investigate the metagenomics of local and improved chickens for AR.
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10
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Xie J, Jin L, Wu D, Pruden A, Li X. Inhalable Antibiotic Resistome from Wastewater Treatment Plants to Urban Areas: Bacterial Hosts, Dissemination Risks, and Source Contributions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:7040-7051. [PMID: 35038864 DOI: 10.1021/acs.est.1c07023] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Antibiotic resistance genes (ARGs) are commonly detected in the atmosphere, but questions remain regarding their sources and relative contributions, bacterial hosts, and corresponding human health risks. Here, we conducted a qPCR- and metagenomics-based investigation of inhalable fine particulate matter (PM2.5) at a large wastewater treatment plant (WWTP) and in the ambient air of Hong Kong, together with an in-depth analysis of published data of other potential sources in the area. PM2.5 was observed with increasing enrichment of total ARGs along the coastal-urban-WWTP gradient and clinically relevant ARGs commonly identified in urban and WWTP sites, illustrating anthropogenic impacts on the atmospheric accumulation of ARGs. With certain kinds of putative antibiotic-resistant pathogens detected in urban and WWTP PM2.5, a comparable proportion of ARGs that co-occurred with MGEs was found between the atmosphere and WWTP matrices. Despite similar emission rates of bacteria and ARGs within each WWTP matrix, about 11-13% of the bacteria and >57% of the relevant ARGs in urban and WWTP PM2.5 were attributable to WWTPs. Our study highlights the importance of WWTPs in disseminating bacteria and ARGs to the ambient air from a quantitative perspective and, thus, the need to control potential sources of inhalation exposure to protect the health of urban populations.
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Affiliation(s)
- Jiawen Xie
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China
| | - Ling Jin
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Dong Wu
- Key Laboratory for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Science, East China Normal University, Shanghai 200241, China
| | - Amy Pruden
- Department of Civil & Environmental Engineering, Virginia Tech, Blacksburg, Virginia 24060, United States
| | - Xiangdong Li
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China
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11
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Abbassi MS, Badi S, Lengliz S, Mansouri R, Hammami S, Hynds P. Hiding in plain sight - Wildlife as a neglected reservoir and pathway for the spread of antimicrobial resistance: A narrative review. FEMS Microbiol Ecol 2022; 98:6568898. [DOI: 10.1093/femsec/fiac045] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 03/01/2022] [Accepted: 04/12/2022] [Indexed: 11/14/2022] Open
Abstract
ABSTRACT
Antimicrobial resistance represents a global health problem, with infections due to pathogenic antimicrobial resistant bacteria (ARB) predicted to be the most frequent cause of human mortality by 2050. The phenomenon of antimicrobial resistance has spread to and across all ecological niches, and particularly in livestock used for food production with antimicrobials consumed in high volumes. Similarly, hospitals and other healthcare facilities are recognized as significant “hotspots” of ARB and antimicrobial resistance genes (ARGs); however, over the past decade, new and previously overlooked ecological niches are emerging as hidden reservoirs of ARB/ARGs. Increasingly extensive and intensive industrial activities, degradation of natural environments, burgeoning food requirements, urbanization, and global climatic change have all dramatically affected the evolution and proliferation of ARB/ARGs, which now stand at extremely concerning ecological levels. While antimicrobial resistant bacteria and genes as they originate and emanate from livestock and human hosts have been extensively studied over the past 30 years, numerous ecological niches have received considerably less attention. In the current descriptive review, the authors have sought to highlight the importance of wildlife as sources/reservoirs, pathways and receptors of ARB/ARGs in the environment, thus paving the way for future primary research in these areas.
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Affiliation(s)
- Mohamed Salah Abbassi
- Université de Tunis El Manar, Institut de la recherche vétérinaire de Tunisie, Tunis, Tunisia
- Université de Tunis El Manar, Faculté de Médecine de Tunis, LR99ES09 Laboratoire de recherche «Résistance aux antimicrobiens» 1007, Tunis, Tunisia
| | - Souhir Badi
- Université de Tunis El Manar, Institut de la recherche vétérinaire de Tunisie, Tunis, Tunisia
| | - Sana Lengliz
- Université de Tunis El Manar, Institut de la recherche vétérinaire de Tunisie, Tunis, Tunisia
| | - Riadh Mansouri
- Université de Tunis El Manar, Institut de la recherche vétérinaire de Tunisie, Tunis, Tunisia
| | - Salah Hammami
- Université Manouba, IRESA, École Nationale de Médecine Vétérinaire de Sidi Thabet, Sidi Thabet 2020, Ariana, Tunisia
| | - Paul Hynds
- Environmental Sustainability and Health Institute (ESHI), Technological University Dublin, Grangegorman, Dublin 7, Dublin, Republic of Ireland
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WHO Critical Priority Escherichia coli as One Health Challenge for a Post-Pandemic Scenario: Genomic Surveillance and Analysis of Current Trends in Brazil. Microbiol Spectr 2022; 10:e0125621. [PMID: 35234515 PMCID: PMC8941879 DOI: 10.1128/spectrum.01256-21] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The dissemination of carbapenem-resistant and third generation cephalosporin-resistant pathogens is a critical issue that is no longer restricted to hospital settings. The rapid spread of critical priority pathogens in Brazil is notably worrying, considering its continental dimension, the diversity of international trade, livestock production, and human travel. We conducted a nationwide genomic investigation under a One Health perspective that included Escherichia coli strains isolated from humans and nonhuman sources, over 45 years (1974–2019). One hundred sixty-seven genomes were analyzed extracting clinically relevant information (i.e., resistome, virulome, mobilome, sequence types [STs], and phylogenomic). The endemic status of extended-spectrum β-lactamase (ESBL)-positive strains carrying a wide diversity of blaCTX-M variants, and the growing number of colistin-resistant isolates carrying mcr-type genes was associated with the successful expansion of international ST10, ST38, ST115, ST131, ST354, ST410, ST648, ST517, and ST711 clones; phylogenetically related and shared between human and nonhuman hosts, and polluted aquatic environments. Otherwise, carbapenem-resistant ST48, ST90, ST155, ST167, ST224, ST349, ST457, ST648, ST707, ST744, ST774, and ST2509 clones from human host harbored blaKPC-2 and blaNDM-1 genes. A broad resistome to other clinically relevant antibiotics, hazardous heavy metals, disinfectants, and pesticides was further predicted. Wide virulome associated with invasion/adherence, exotoxin and siderophore production was related to phylogroup B2. The convergence of wide resistome and virulome has contributed to the persistence and rapid spread of international high-risk clones of critical priority E. coli at the human-animal-environmental interface, which must be considered a One Health challenge for a post-pandemic scenario. IMPORTANCE A One Health approach for antimicrobial resistance must integrate whole-genome sequencing surveillance data of critical priority pathogens from human, animal and environmental sources to track hot spots and routes of transmission and developing effective prevention and control strategies. As part of the Grand Challenges Explorations: New Approaches to Characterize the Global Burden of Antimicrobial Resistance Program, we present genomic data of WHO critical priority carbapenemase-resistant, ESBL-producing, and/or colistin-resistant Escherichia coli strains isolated from humans and nonhuman sources in Brazil, a country with continental proportions and high levels of antimicrobial resistance. The present study provided evidence of epidemiological and clinical interest, highlighting that the convergence of wide virulome and resistome has contributed to the persistence and rapid spread of international high-risk clones of E. coli at the human-animal-environmental interface, which must be considered a One Health threat that requires coordinated actions to reduce its incidence in humans and nonhuman hosts.
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Al Salah DMM, Laffite A, Sivalingam P, Poté J. Occurrence of toxic metals and their selective pressure for antibiotic-resistant clinically relevant bacteria and antibiotic-resistant genes in river receiving systems under tropical conditions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:20530-20541. [PMID: 34739670 PMCID: PMC8898216 DOI: 10.1007/s11356-021-17115-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 10/15/2021] [Indexed: 04/15/2023]
Abstract
The co-occurrence of heavy metals, antibiotic-resistant bacteria (ARB) and antibiotic-resistance genes (ARGs) from hospital effluents spreading into the river receiving systems and evaluating associated risks are topics of scientific interest and still under-studied in developing countries under tropical conditions. To understand the selectors of the ARGs, we examined the occurrence of heavy metals (Cr, Co, Ni, Cu, Cd, Pb and Zn), associated ARB (β-lactam-resistant Escherichia coli, β-lactam-resistant Enterobacteriaceae, and carbapenem-resistant Enterobacteriaceae) and ARGs (blaOXA, blaCTX-M, blaIMP, blaTEM) in water and sediments from two sub-urban rivers receiving urban and hospital effluent waters in the Democratic Republic of the Congo (DRC). High abundances of ARB and ARGs were observed in all sediment samples. All the metal contents correlated negatively with grain size (- 0.94 ≤ r ≤ - 0.54, p < 0.05) except for Ni and positively with organic matter content and total copies of 16 s rRNA (0.42 ≤ r ≤ 0.79, p < 0.05), except for Ni and Zn. The metals had a significant positive correlation with the faecal indicator Enterococcus except for Ni and Cd (0.43 ≤ r ≤ 0.67, p < 0.05). Carbapenem-resistant Enterobacteriaceae correlated negatively with Zn (r = - 0.44, p < 0.05) and positively with all the rest of toxic metals (0.58 ≤ r ≤ 1.0, p < 0.05). These results suggested that some metals had a great influence on the persistence of ARB and ARGs in sediments. Overall, this study strongly recommends the managing urban wastewater to preserve water resources used for human and agricultural purposes. Additionally, we recommend the utilizing biological indicators (faecal indicator bacteria, ARB, ARGs) when investigating urban wastewater pollutions.
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Affiliation(s)
- Dhafer Mohammed M Al Salah
- Department F. A. Forel, Faculty of Sciences, Earth and Environmental Sciences, Institute F. A. Forel and Institute of Environmental Sciences, University of Geneva, Bd Carl-Vogt 66, CH-1211, Geneva 4, Switzerland
- King Abdulaziz City for Science and Technology, Joint Centers of Excellence Program, Prince Turki the 1st St, Riyadh, 11442, Saudi Arabia
| | - Amandine Laffite
- Department F. A. Forel, Faculty of Sciences, Earth and Environmental Sciences, Institute F. A. Forel and Institute of Environmental Sciences, University of Geneva, Bd Carl-Vogt 66, CH-1211, Geneva 4, Switzerland
| | - Periyasamy Sivalingam
- Postgraduate and Research Department of Microbiology, Jamal Mohamed College, Tamil Nadu, Tiruchirappalli, 620020, India
| | - John Poté
- Department F. A. Forel, Faculty of Sciences, Earth and Environmental Sciences, Institute F. A. Forel and Institute of Environmental Sciences, University of Geneva, Bd Carl-Vogt 66, CH-1211, Geneva 4, Switzerland.
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Mizrahi I, Wallace RJ, Moraïs S. The rumen microbiome: balancing food security and environmental impacts. Nat Rev Microbiol 2021; 19:553-566. [PMID: 33981031 DOI: 10.1038/s41579-021-00543-6] [Citation(s) in RCA: 107] [Impact Index Per Article: 35.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/09/2021] [Indexed: 02/03/2023]
Abstract
Ruminants produce edible products and contribute to food security. They house a complex rumen microbial community that enables the host to digest their plant feed through microbial-mediated fermentation. However, the rumen microbiome is also responsible for the production of one of the most potent greenhouse gases, methane, and contributes about 18% of its total anthropogenic emissions. Conventional methods to lower methane production by ruminants have proved successful, but to a limited and often temporary extent. An increased understanding of the host-microbiome interactions has led to the development of new mitigation strategies. In this Review we describe the composition, ecology and metabolism of the rumen microbiome, and the impact on host physiology and the environment. We also discuss the most pertinent methane mitigation strategies that emerged to balance food security and environmental impacts.
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Affiliation(s)
- Itzhak Mizrahi
- Department of Life Sciences, Ben-Gurion University of the Negev and the National Institute for Biotechnology in the Negev, Marcus Family Campus, Be'er-Sheva, Israel.
| | - R John Wallace
- The Rowett Institute, University of Aberdeen, Aberdeen, UK
| | - Sarah Moraïs
- Department of Life Sciences, Ben-Gurion University of the Negev and the National Institute for Biotechnology in the Negev, Marcus Family Campus, Be'er-Sheva, Israel
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15
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Bornbusch SL, Drea CM. Antibiotic Resistance Genes in Lemur Gut and Soil Microbiota Along a Gradient of Anthropogenic Disturbance. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.704070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The overuse of man-made antibiotics has facilitated the global propagation of antibiotic resistance genes in animals, across natural and anthropogenically disturbed environments. Although antibiotic treatment is the most well-studied route by which resistance genes can develop and spread within host-associated microbiota, resistomes also can be acquired or enriched via more indirect routes, such as via transmission between hosts or via contact with antibiotic-contaminated matter within the environment. Relatively little is known about the impacts of anthropogenic disturbance on reservoirs of resistance genes in wildlife and their environments. We therefore tested for (a) antibiotic resistance genes in primate hosts experiencing different severities and types of anthropogenic disturbance (i.e., non-wildlife animal presence, human presence, direct human contact, and antibiotic treatment), and (b) covariation between host-associated and environmental resistomes. We used shotgun metagenomic sequencing of ring-tailed lemur (Lemur catta) gut resistomes and associated soil resistomes sampled from up to 10 sites: seven in the wilderness of Madagascar and three in captivity in Madagascar or the United States. We found that, compared to wild lemurs, captive lemurs harbored greater abundances of resistance genes, but not necessarily more diverse resistomes. Abundances of resistance genes were positively correlated with our assessments of anthropogenic disturbance, a pattern that was robust across all ten lemur populations. The composition of lemur resistomes was site-specific and the types of resistance genes reflected antibiotic usage in the country of origin, such as vancomycin use in Madagascar. We found support for multiple routes of ARG enrichment (e.g., via human contact, antibiotic treatment, and environmental acquisition) that differed across lemur populations, but could result in similar degrees of enrichment. Soil resistomes varied across natural habitats in Madagascar and, at sites with greater anthropogenic disturbance, lemurs and soil resistomes covaried. As one of the broadest, single-species investigations of wildlife resistomes to date, we show that the transmission and enrichment of antibiotic resistance genes varies across environments, thereby adding to the mounting evidence that the resistance crisis extends outside of traditional clinical settings.
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Potential Environmental and Human Health Risks Caused by Antibiotic-Resistant Bacteria (ARB), Antibiotic Resistance Genes (ARGs) and Emerging Contaminants (ECs) from Municipal Solid Waste (MSW) Landfill. Antibiotics (Basel) 2021; 10:antibiotics10040374. [PMID: 33915892 PMCID: PMC8065726 DOI: 10.3390/antibiotics10040374] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/25/2021] [Accepted: 03/27/2021] [Indexed: 02/07/2023] Open
Abstract
The disposal of municipal solid waste (MSW) directly at landfills or open dump areas, without segregation and treatment, is a significant concern due to its hazardous contents of antibiotic-resistant bacteria (ARB), antibiotic resistance genes (ARGs), and metal resistance genes (MGEs). The released leachate from landfills greatly effects the soil physicochemical, biological, and groundwater properties associated with agricultural activity and human health. The abundance of ARB, ARGs, and MGEs have been reported worldwide, including MSW landfill sites, animal husbandry, wastewater, groundwater, soil, and aerosol. This review elucidates the occurrence and abundance of ARB, ARGs, and MRGs, which are regarded as emerging contaminants (ECs). Recently, ECs have received global attention because of their prevalence in leachate as a substantial threat to environmental and public health, including an economic burden for developing nations. The present review exclusively discusses the demands to develop a novel eco-friendly management strategy to combat these global issues. This review also gives an intrinsic discussion about the insights of different aspects of environmental and public health concerns caused due to massive leachate generation, the abundance of antibiotics resistance (AR), and the effects of released leachate on the various environmental reservoirs and human health. Furthermore, the current review throws light on the source and fate of different ECs of landfill leachate and their possible impact on the nearby environments (groundwater, surface water, and soil) affecting human health. The present review strongly suggests the demand for future research focuses on the advancement of the removal efficiency of contaminants with the improvement of relevant landfill management to reduce the potential effects of disposable waste. We propose the necessity of the identification and monitoring of potential environmental and human health risks associated with landfill leachate contaminants.
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Tolentino FM, De Almeida IAZC, Dos Santos CCM, Teixeira ISDC, Silva SIDLE, Nogueira MCL, Arroyo MG, Faim WR, De Almeida MTG, Peresi JTM. Phenotypic and genotypic profile of the antimicrobial resistance of bacterial isolates and evaluation of physical and chemical potability indicators in groundwater in Brazil. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2021; 31:186-201. [PMID: 31293171 DOI: 10.1080/09603123.2019.1640354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 07/02/2019] [Indexed: 06/09/2023]
Abstract
The aquatic environment has received increasing attention regarding the evolution of bacterial resistance, either as a source of resistance genes or as a matrix for the dissemination of these genes. We evaluated the physicochemical, microbiological and antimicrobial resistance characteristics of 160 samples from alternative water well solutions. According to Ordinance 2914/2011 - MS, 44 (27.5%) samples were considered unsafe if at least one physicochemical parameter exceeded permissible limits. Escherichia coli were found in 30.6% of the unregistered housing estates (UHE) and 1.9% of the local sanitary surveillance system (RW). The total of 158 bacterial strains were isolated from 13 (25%) RW and 68 (63%) UHE, 132 of which (83.5%) were obtained from UHE samples. In the investigation of resistance genes, tetA, qnrS and qnrB genes were detected in three, one and eight isolates, respectively. Our results emphasize the importance of constant surveillance and control of the quality of water supplies.
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Affiliation(s)
- Fernanda Modesto Tolentino
- Instituto Adolfo Lutz - Centro de Laboratório Regional de São José do Rio Preto - Rua Alberto Sufredine Bertone , São José do Rio Preto-SP, Brasil
| | | | - Cecilia Cristina Marques Dos Santos
- Instituto Adolfo Lutz - Centro de Laboratório Regional de São José do Rio Preto - Rua Alberto Sufredine Bertone , São José do Rio Preto-SP, Brasil
| | - Inara Siqueira De Carvalho Teixeira
- Instituto Adolfo Lutz - Centro de Laboratório Regional de São José do Rio Preto - Rua Alberto Sufredine Bertone , São José do Rio Preto-SP, Brasil
| | - Sonia Izaura De Lima E Silva
- Instituto Adolfo Lutz - Centro de Laboratório Regional de São José do Rio Preto - Rua Alberto Sufredine Bertone , São José do Rio Preto-SP, Brasil
| | - Mara Correa Lelles Nogueira
- Centro de Pesquisas de Micro-organismos da Faculdade de Medicina de São José do Rio Preto , São José do Rio Preto-SP, Brasil
| | - Máira Gazzola Arroyo
- Centro de Pesquisas de Micro-organismos da Faculdade de Medicina de São José do Rio Preto , São José do Rio Preto-SP, Brasil
| | - Wilson Roberto Faim
- Secretaria Municipal de Saúde e Higiene - Vigilância Sanitária de São José do Rio Preto , São José do Rio Preto-SP, Brasil
| | | | - Jacqueline Tanury Macruz Peresi
- Instituto Adolfo Lutz - Centro de Laboratório Regional de São José do Rio Preto - Rua Alberto Sufredine Bertone , São José do Rio Preto-SP, Brasil
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18
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Tang X, Shen M, Zhang Y, Zhu D, Wang H, Zhao Y, Kang Y. The changes in antibiotic resistance genes during 86 years of the soil ripening process without anthropogenic activities. CHEMOSPHERE 2021; 266:128985. [PMID: 33228990 DOI: 10.1016/j.chemosphere.2020.128985] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 10/30/2020] [Accepted: 11/12/2020] [Indexed: 06/11/2023]
Abstract
This study aimed to reveal the baseline of natural variations in antibiotic resistance genes (ARGs) in soil without anthropogenic activities over the decades. Nine soil samples with different time of soil formation were taken from the Yancheng Wetland National Nature Reserve, China. ARGs and mobile genetic elements (MGEs) were characterized using metagenomic analysis. A total of 196 and 192 subtypes of ARGs were detected in bulk soil and rhizosphere, respectively. The diversity and abundance of ARGs were stable during 69 years probably due to the alkaline pH soil environment but not due to antibiotics. Increases in ARGs after 86 years were probably attributed to more migrant birds inhabited compared with other sampling sites. Multidrug was the most abundant type, and largely shared by soil samples. It was further shown that soil samples could not be clearly distinguished, suggesting a slow process of succession of ARGs in the mudflat. The variation partitioning analysis revealed that the ARG profile was driven by the comprehensive effects exhibited by the bacterial community, MGEs, and environmental factors. Besides, pathogenic bacteria containing ARGs mediated by migrant birds in the area with 86 years of soil formation history nearing human settlements needed special attention. This study revealed the slow variations in ARGs in the soil ripening process without anthropogenic activities over decades, and it provided information for assessing the effect of human activities on the occurrence and dissemination of ARGs.
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Affiliation(s)
- Xingyao Tang
- Yancheng Bioengineering Research Center for 'Binhai Bai-shou-wu', Yancheng Teachers University, Yancheng, Jiangsu, PR China
| | - Min Shen
- Yancheng Bioengineering Research Center for 'Binhai Bai-shou-wu', Yancheng Teachers University, Yancheng, Jiangsu, PR China
| | - Yanzhou Zhang
- Yancheng Bioengineering Research Center for 'Binhai Bai-shou-wu', Yancheng Teachers University, Yancheng, Jiangsu, PR China
| | - Dewei Zhu
- Yancheng Bioengineering Research Center for 'Binhai Bai-shou-wu', Yancheng Teachers University, Yancheng, Jiangsu, PR China
| | - Huanli Wang
- Yancheng Bioengineering Research Center for 'Binhai Bai-shou-wu', Yancheng Teachers University, Yancheng, Jiangsu, PR China
| | - Yongqiang Zhao
- Yancheng National Nature Reserve for Rare Birds, Yancheng, Jiangsu, PR China
| | - Yijun Kang
- Yancheng Bioengineering Research Center for 'Binhai Bai-shou-wu', Yancheng Teachers University, Yancheng, Jiangsu, PR China.
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19
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Zhu G, Wang X, Yang T, Su J, Qin Y, Wang S, Gillings M, Wang C, Ju F, Lan B, Liu C, Li H, Long XE, Wang X, Jetten MSM, Wang Z, Zhu YG. Air pollution could drive global dissemination of antibiotic resistance genes. THE ISME JOURNAL 2021; 15:270-281. [PMID: 32963346 PMCID: PMC7852678 DOI: 10.1038/s41396-020-00780-2] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 08/13/2020] [Accepted: 09/14/2020] [Indexed: 11/08/2022]
Abstract
Antibiotic-resistant pathogens pose a significant threat to human health. Several dispersal mechanisms have been described, but transport of both microbes and antibiotic resistance genes (ARGs) via atmospheric particles has received little attention as a pathway for global dissemination. These atmospheric particles can return to the Earth's surface via rain or snowfall, and thus promote long-distance spread of ARGs. However, the diversity and abundance of ARGs in fresh snow has not been studied and their potential correlation with particulate air pollution is not well explored. Here, we characterized ARGs in 44 samples of fresh snow from major cities in China, three in North America, and one in Europe, spanning a gradient from pristine to heavily anthropogenically influenced ecosystems. High-throughput qPCR analysis of ARGs and mobile genetic elements (MGEs) provided strong indications that dissemination of ARGs in fresh snow could be exacerbated by air pollution, severely increasing the health risks of both air pollution and ARGs. We showed that snowfall did effectively spread ARGs from point sources over the Earth surface. Together our findings urge for better pollution control to reduce the risk of global dissemination of antibiotic resistance genes.
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Affiliation(s)
- Guibing Zhu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
| | - Xiaomin Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Ting Yang
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
| | - Jianqiang Su
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Yu Qin
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Shanyun Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Michael Gillings
- ARC Centre of Excellence in Synthetic Biology, Department of Biological Sciences, Faculty of Science and Engineering, Macquarie University, Sydney, NSW, 2109, Australia
| | - Cheng Wang
- South China Sea Institution, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Guangzhou, 510006, China
| | - Feng Ju
- Environmental Microbiome and Biotechnology Laboratory (EMBLab), School of Engineering, Westlake University, Hangzhou, 310024, China
| | - Bangrui Lan
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Chunlei Liu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Hu Li
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Xi-En Long
- School of Geographic Sciences, Nantong University, Nantong, 226007, China
| | - Xuming Wang
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Mike S M Jetten
- Department of Microbiology, Radboud University Nijmegen, 36525, AJ, Nijmegen, The Netherlands
| | - Zifa Wang
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China.
| | - Yong-Guan Zhu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
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20
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Oliveira de Araujo G, Huff R, Favarini MO, Mann MB, Peters FB, Frazzon J, Guedes Frazzon AP. Multidrug Resistance in Enterococci Isolated From Wild Pampas Foxes ( Lycalopex gymnocercus) and Geoffroy's Cats ( Leopardus geoffroyi) in the Brazilian Pampa Biome. Front Vet Sci 2020; 7:606377. [PMID: 33426025 PMCID: PMC7793794 DOI: 10.3389/fvets.2020.606377] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 11/03/2020] [Indexed: 12/31/2022] Open
Abstract
Enterococci are ubiquitous microorganisms present in various environments and within the gastrointestinal tracts of humans and other animals. Notably, fecal enterococci are suitable indicators for monitoring antimicrobial resistance dissemination. Resistant bacterial strains recovered from the fecal samples of wild animals can highlight important aspects of environmental disturbances. In this report, we investigated antimicrobial susceptibility as well as resistance and virulence genes in fecal enterococci isolated from wild Pampas foxes (Lycalopex gymnocercus) (n = 5) and Geoffroy's cats (Leopardus geoffroyi) (n = 4) in the Brazilian Pampa biome. Enterococci were isolated from eight out of nine fecal samples and Enterococcus faecalis was identified in both animals. However, E. faecium and E. durans were only detected in Pampas foxes, while E. hirae was only detected in Geoffroy's cats. Antimicrobial susceptibility analysis showed resistance to rifampicin (94%), erythromycin (72.6%), ciprofloxacin/norfloxacin (40%), streptomycin (38%), and tetracycline (26%). The high frequency of multidrug-resistant enterococci (66%) isolated in this study is a matter of concern since these are wild animals with no history of therapeutic antibiotic exposure. The tetM/tetL and msrC/ermB genes were detected in most tetracycline- and erythromycin-resistant enterococci, respectively. The gelE, ace, agg, esp, and clyA virulence genes were also detected in enterococci. In conclusion, our data suggest that habitat fragmentation and anthropogenic activities in the Pampa biome may contribute to high frequencies of multidrug-resistant enterococci in the gut communities of wild Pampas foxes and Geoffroy's cats. To the best of the authors' knowledge, this is the first report of antimicrobial-resistant enterococci in the Pampa biome.
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Affiliation(s)
- Gabriella Oliveira de Araujo
- Graduate Program in Agricultural and Environmental Microbiology, Institute of Basic Health Sciences, Federal University of Rio Grande Do Sul, Porto Alegre, Brazil
| | - Rosana Huff
- Graduate Program in Agricultural and Environmental Microbiology, Institute of Basic Health Sciences, Federal University of Rio Grande Do Sul, Porto Alegre, Brazil
| | - Marina Ochoa Favarini
- Institute for the Conservation of Neotropical Carnivores- "Pró-Carnívoros", Atibaia, Brazil
| | - Michele Bertoni Mann
- Graduate Program in Agricultural and Environmental Microbiology, Institute of Basic Health Sciences, Federal University of Rio Grande Do Sul, Porto Alegre, Brazil
| | | | - Jeverson Frazzon
- Institute of Food Science and Technology, Federal University of Rio Grande Do Sul, Porto Alegre, Brazil
| | - Ana Paula Guedes Frazzon
- Graduate Program in Agricultural and Environmental Microbiology, Institute of Basic Health Sciences, Federal University of Rio Grande Do Sul, Porto Alegre, Brazil
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Marano RBM, Fernandes T, Manaia CM, Nunes O, Morrison D, Berendonk TU, Kreuzinger N, Tenson T, Corno G, Fatta-Kassinos D, Merlin C, Topp E, Jurkevitch E, Henn L, Scott A, Heß S, Slipko K, Laht M, Kisand V, Di Cesare A, Karaolia P, Michael SG, Petre AL, Rosal R, Pruden A, Riquelme V, Agüera A, Esteban B, Luczkiewicz A, Kalinowska A, Leonard A, Gaze WH, Adegoke AA, Stenstrom TA, Pollice A, Salerno C, Schwermer CU, Krzeminski P, Guilloteau H, Donner E, Drigo B, Libralato G, Guida M, Bürgmann H, Beck K, Garelick H, Tacão M, Henriques I, Martínez-Alcalá I, Guillén-Navarro JM, Popowska M, Piotrowska M, Quintela-Baluja M, Bunce JT, Polo-López MI, Nahim-Granados S, Pons MN, Milakovic M, Udikovic-Kolic N, Ory J, Ousmane T, Caballero P, Oliver A, Rodriguez-Mozaz S, Balcazar JL, Jäger T, Schwartz T, Yang Y, Zou S, Lee Y, Yoon Y, Herzog B, Mayrhofer H, Prakash O, Nimonkar Y, Heath E, Baraniak A, Abreu-Silva J, Choudhury M, Munoz LP, Krizanovic S, Brunetti G, Maile-Moskowitz A, Brown C, Cytryn E. A global multinational survey of cefotaxime-resistant coliforms in urban wastewater treatment plants. ENVIRONMENT INTERNATIONAL 2020; 144:106035. [PMID: 32835921 DOI: 10.1016/j.envint.2020.106035] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 08/02/2020] [Accepted: 08/03/2020] [Indexed: 05/29/2023]
Abstract
The World Health Organization Global Action Plan recommends integrated surveillance programs as crucial strategies for monitoring antibiotic resistance. Although several national surveillance programs are in place for clinical and veterinary settings, no such schemes exist for monitoring antibiotic-resistant bacteria in the environment. In this transnational study, we developed, validated, and tested a low-cost surveillance and easy to implement approach to evaluate antibiotic resistance in wastewater treatment plants (WWTPs) by targeting cefotaxime-resistant (CTX-R) coliforms as indicators. The rationale for this approach was: i) coliform quantification methods are internationally accepted as indicators of fecal contamination in recreational waters and are therefore routinely applied in analytical labs; ii) CTX-R coliforms are clinically relevant, associated with extended-spectrum β-lactamases (ESBLs), and are rare in pristine environments. We analyzed 57 WWTPs in 22 countries across Europe, Asia, Africa, Australia, and North America. CTX-R coliforms were ubiquitous in raw sewage and their relative abundance varied significantly (<0.1% to 38.3%), being positively correlated (p < 0.001) with regional atmospheric temperatures. Although most WWTPs removed large proportions of CTX-R coliforms, loads over 103 colony-forming units per mL were occasionally observed in final effluents. We demonstrate that CTX-R coliform monitoring is a feasible and affordable approach to assess wastewater antibiotic resistance status.
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Affiliation(s)
- Roberto B M Marano
- Department of Agroecology and Plant Health, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel; Department of Soil Chemistry, Plant Nutrition and Microbiology, Institute of Soil Water and Environmental Sciences, Volcani Center, Agricultural Research Organization, Rishon Lezion, Israel
| | - Telma Fernandes
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172, 4200-374 Porto, Portugal
| | - Célia M Manaia
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172, 4200-374 Porto, Portugal
| | - Olga Nunes
- LEPABE, Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Donald Morrison
- School Applied Sciences, Edinburgh Napier University, EH11 4BN, UK
| | | | - Norbert Kreuzinger
- Vienna University of Technology, Institute for Water Quality and Resources Management, Vienna, Austria
| | - Tanel Tenson
- Institute of Technology, University of Tartu, Estonia
| | - Gianluca Corno
- CNR-IRSA Molecular Ecology Group, Largo Tonolli 50, 28922 Verbania, Italy
| | - Despo Fatta-Kassinos
- Civil and Environmental Engineering Department and Nireas International Water Research Center, University of Cyprus, P.O. Box 20537, CY-1678 Nicosia, Cyprus
| | | | - Edward Topp
- Agriculture and Agri-Food Canada, London Research and Development Centre (ON), Canada; Department of Biology, University of Western Ontario, London, ON, Canada
| | - Edouard Jurkevitch
- Department of Agroecology and Plant Health, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Leonie Henn
- School Applied Sciences, Edinburgh Napier University, EH11 4BN, UK
| | - Andrew Scott
- Agriculture and Agri-Food Canada, London Research and Development Centre (ON), Canada
| | - Stefanie Heß
- Institute of Hydrobiology, TU Dresden, Dresden, Germany; Institute of Microbiology, TU Dresden, Dresden, Germany
| | - Katarzyna Slipko
- Vienna University of Technology, Institute for Water Quality and Resources Management, Vienna, Austria
| | - Mailis Laht
- Institute of Technology, University of Tartu, Estonia; Estonian Environmental Research Centre, Estonia
| | - Veljo Kisand
- Institute of Technology, University of Tartu, Estonia
| | - Andrea Di Cesare
- CNR-IRSA Molecular Ecology Group, Largo Tonolli 50, 28922 Verbania, Italy
| | - Popi Karaolia
- Civil and Environmental Engineering Department and Nireas International Water Research Center, University of Cyprus, P.O. Box 20537, CY-1678 Nicosia, Cyprus
| | - Stella G Michael
- Civil and Environmental Engineering Department and Nireas International Water Research Center, University of Cyprus, P.O. Box 20537, CY-1678 Nicosia, Cyprus
| | - Alice L Petre
- Department of Chemical Engineering, University of Alcalá, E-28871 Alcalá de Henares, Madrid, Spain
| | - Roberto Rosal
- Department of Chemical Engineering, University of Alcalá, E-28871 Alcalá de Henares, Madrid, Spain
| | - Amy Pruden
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA, USA
| | - Virginia Riquelme
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA, USA
| | - Ana Agüera
- Solar Energy Research Centre (CIESOL), Joint Centre University of Almería-CIEMAT, 04120 Almería, Spain
| | - Belen Esteban
- Solar Energy Research Centre (CIESOL), Joint Centre University of Almería-CIEMAT, 04120 Almería, Spain
| | - Aneta Luczkiewicz
- Faculty of Civil and Environmental Engineering, Gdansk University of Technology, G. Narutowicza 11/12 street, 80-233 Gdańsk, Poland
| | - Agnieszka Kalinowska
- Faculty of Civil and Environmental Engineering, Gdansk University of Technology, G. Narutowicza 11/12 street, 80-233 Gdańsk, Poland
| | - Anne Leonard
- University of Exeter Medical School, European Centre for Environment and Human Health, Environment and Sustainability Institute, University of Exeter, Penryn campus, TR10 9FE, UK
| | - William H Gaze
- University of Exeter Medical School, European Centre for Environment and Human Health, Environment and Sustainability Institute, University of Exeter, Penryn campus, TR10 9FE, UK
| | - Anthony A Adegoke
- Institute for Water and Wastewater Technology, Durban University of Technology, Durban South Africa; Department of Microbiology, University of Uyo, Uyo, Nigeria
| | - Thor A Stenstrom
- Institute for Water and Wastewater Technology, Durban University of Technology, Durban South Africa
| | | | | | - Carsten U Schwermer
- Norwegian Institute for Water Research, Gaustadalléen 21, N-0349 Oslo, Norway
| | - Pawel Krzeminski
- Norwegian Institute for Water Research, Gaustadalléen 21, N-0349 Oslo, Norway
| | | | - Erica Donner
- Future Industries Institute, University of South Australia, Adelaide, SA 5001, Australia
| | - Barbara Drigo
- Future Industries Institute, University of South Australia, Adelaide, SA 5001, Australia
| | - Giovanni Libralato
- Department of Biology, University of Naples Federico II, via Cinthia 21, 80126 Naples, Italy
| | - Marco Guida
- Department of Biology, University of Naples Federico II, via Cinthia 21, 80126 Naples, Italy
| | - Helmut Bürgmann
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, 6047 Kastanienbaum, Switzerland
| | - Karin Beck
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, 6047 Kastanienbaum, Switzerland
| | - Hemda Garelick
- Department of Natural Sciences, Middlesex University, London NW4 4BT, UK
| | - Marta Tacão
- CESAM and Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193, Portugal
| | - Isabel Henriques
- CESAM and Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193, Portugal; University of Coimbra, Department of Life Sciences, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - Isabel Martínez-Alcalá
- Department of Civil Engineering, Av. de los Jerónimos, 135, 30107 Guadalupe, Murcia, Spain
| | - Jose M Guillén-Navarro
- Department of Civil Engineering, Av. de los Jerónimos, 135, 30107 Guadalupe, Murcia, Spain
| | - Magdalena Popowska
- Institute of Microbiology, Department of Applied Microbiology, Faculty of Biology, University of Warsaw, Poland
| | - Marta Piotrowska
- Institute of Microbiology, Department of Applied Microbiology, Faculty of Biology, University of Warsaw, Poland
| | | | - Joshua T Bunce
- School of Engineering, Newcastle University, Newcastle Upon Tyne, UK
| | - Maria I Polo-López
- Solar Energy Research Centre (CIESOL), Joint Centre University of Almería-CIEMAT, 04120 Almería, Spain; Plataforma Solar de Almería - CIEMAT, P.O. Box 22, 04200 Tabernas, Almería, Spain
| | - Samira Nahim-Granados
- Solar Energy Research Centre (CIESOL), Joint Centre University of Almería-CIEMAT, 04120 Almería, Spain; Plataforma Solar de Almería - CIEMAT, P.O. Box 22, 04200 Tabernas, Almería, Spain
| | | | | | | | - Jérôme Ory
- Laboratoire "Microorganisme: Génome et Environnement", Université Clermont Auvergne, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6023, LMGE, F-63170 Campus Universitaire des Cézeaux, Clermont-Ferrand, France; Service d'hygiène hospitalière, CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Traore Ousmane
- Laboratoire "Microorganisme: Génome et Environnement", Université Clermont Auvergne, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6023, LMGE, F-63170 Campus Universitaire des Cézeaux, Clermont-Ferrand, France; Service d'hygiène hospitalière, CHU Clermont-Ferrand, Clermont-Ferrand, France
| | | | - Antoni Oliver
- Laboratori EMATSA, Ctra Valls Km 3, 43130 Tarragona, Spain
| | | | - Jose L Balcazar
- Catalan Institute for Water Research (ICRA), 17003 Girona, Spain
| | - Thomas Jäger
- Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
| | - Thomas Schwartz
- Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
| | - Ying Yang
- School of Marine Sciences, Sun Yat-sen University, Guangzhou, China
| | - Shichun Zou
- School of Marine Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yunho Lee
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Younggun Yoon
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Bastian Herzog
- Chair of Urban Water Systems Engineering, Technical University of Munich (TUM), Germany
| | - Heidrun Mayrhofer
- Chair of Urban Water Systems Engineering, Technical University of Munich (TUM), Germany
| | - Om Prakash
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, Pune 411007, India
| | - Yogesh Nimonkar
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, Pune 411007, India
| | - Ester Heath
- Jozef Stefan Institute, Jamova 39 1000 Ljubljana, Slovenia
| | - Anna Baraniak
- National Medicines Institute, Department of Molecular Microbiology, Chelmska 30/34, 00-725 Warsaw, Poland
| | - Joana Abreu-Silva
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172, 4200-374 Porto, Portugal
| | - Manika Choudhury
- Department of Natural Sciences, Middlesex University, London NW4 4BT, UK
| | - Leonardo P Munoz
- Department of Natural Sciences, Middlesex University, London NW4 4BT, UK
| | | | - Gianluca Brunetti
- Future Industries Institute, University of South Australia, Adelaide, SA 5001, Australia
| | | | - Connor Brown
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA, USA
| | - Eddie Cytryn
- Department of Soil Chemistry, Plant Nutrition and Microbiology, Institute of Soil Water and Environmental Sciences, Volcani Center, Agricultural Research Organization, Rishon Lezion, Israel.
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22
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Assessment of bacterial diversity and their antibiotic resistance profiles in wastewater treatment plants and their receiving Ganges River in Prayagraj (Allahabad), India. ACTA ACUST UNITED AC 2020. [DOI: 10.1007/s42535-020-00157-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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23
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Lee S, Mir RA, Park SH, Kim D, Kim HY, Boughton RK, Morris JG, Jeong KC. Prevalence of extended-spectrum β-lactamases in the local farm environment and livestock: challenges to mitigate antimicrobial resistance. Crit Rev Microbiol 2020; 46:1-14. [PMID: 31976793 DOI: 10.1080/1040841x.2020.1715339] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The effectiveness of antibiotics has been challenged by the increasing frequency of antimicrobial resistance (AR), which has emerged as a major threat to global health. Despite the negative impact of AR on health, there are few effective strategies for reducing AR in food-producing animals. Of the antimicrobial resistant microorganisms (ARMs), extended-spectrum β-lactamases (ESBLs)-producing Enterobacteriaceae are an emerging global threat due to their increasing prevalence in livestock, even in animals raised without antibiotics. Many reviews are available for the positive selection of AR associated with antibiotic use in livestock, but less attention has been given to how other factors including soil, water, manure, wildlife, and farm workers, are associated with the emergence of ESBL-producing bacteria. Understanding of antibiotic resistance genes and bacteria transfer at the interfaces of livestock and other potential reservoirs will provide insights for the development of mitigation strategies for AR.
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Affiliation(s)
- Shinyoung Lee
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA.,Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, USA
| | - Raies A Mir
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA.,Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, USA
| | - Si Hong Park
- Department of Food Science and Technology, Oregon State University, Corvallis, OR, USA
| | - Donghyuk Kim
- School of Energy and Chemical Engineering, School of Biological Sciences, and Korean Genomics Industrialization and Commercialization Center, Ulsan National Institute of Science and Technology, Ulsan, Korea
| | - Hae-Yeong Kim
- Institute of Life Sciences and Resources and Department of Food Science and Biotechnology, Kyung-Hee University, Yongin, Korea
| | - Raoul K Boughton
- Range Cattle Research and Education Center, Department of Wildlife Ecology and Conservation, University of Florida, Ona, FL, USA
| | - J Glenn Morris
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA.,Department of Medicine, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Kwangcheol C Jeong
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA.,Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, USA.,Institute of Life Sciences and Resources and Department of Food Science and Biotechnology, Kyung-Hee University, Yongin, Korea
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24
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Eduardo-Correia B, Morales-Filloy H, Abad JP. Bacteria From the Multi-Contaminated Tinto River Estuary (SW, Spain) Show High Multi-Resistance to Antibiotics and Point to Paenibacillus spp. as Antibiotic-Resistance-Dissemination Players. Front Microbiol 2020; 10:3071. [PMID: 31998281 PMCID: PMC6965355 DOI: 10.3389/fmicb.2019.03071] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 12/19/2019] [Indexed: 12/31/2022] Open
Abstract
Bacterial resistance to antibiotics is an ever-increasing phenomenon that, besides clinical settings, is generally assumed to be prevalent in environmental soils and waters. The analysis of bacteria resistant to each one of 11 antibiotics in waters and sediments of the Huelva’s estuary, a multi-contaminated environment, showed high levels of bacteria resistant mainly to Tm, among others. To further gain knowledge on the fate of multi-drug resistance (MDR) in environmental bacteria, 579 ampicillin-resistant bacteria were isolated tested for resistance to 10 antibiotics. 92.7% of the isolates were resistant to four or more antibiotic classes, indicating a high level of multi-resistance. 143 resistance profiles were found. The isolates with different MDR profiles and/or colony morphologies were phylogenetically ascribed based on 16S rDNA to phyla Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes, including 48 genera. Putative intrinsic resistance was detected in different phylogenetic groups including genera Altererythrobacter, Bacillus, Brevundimonas, Erythrobacter, Mesonia, Ochrobactrum, and Ponticaulis. Correlation of the presence of pairs of the non-intrinsic-resistances in phylogenetic groups based on the kappa index (κ) highlighted the co-habitation of some of the tested pairs at different phylogenetic levels. Maximum correlation (κ = 1.000) was found for pairs CzR/TcR in Betaproteobacteria, and CcR/TcR and EmR/SmR in Sphingobacteriia at the class level, while at the genus level, was found for CcR/TcR and NxR/TmR in Mesonia, CzR/TmR and EmR/KmR in Paenibacillus, and CcR/EmR and RpR/TcR in Pseudomonas. These results could suggest the existence of intra-class and intra-genus-transmissible genetic elements containing determinants for both members of each pair. Network analysis based on κ values higher than 0.4 indicated the sharing of paired resistances among several genera, many of them centered on the Paenibacillus node and raising the hypothesis of inter-genera transmission of resistances interconnected through members of this genus. This is the first time that a possible hotspot of resistance interchange in a particular environment may have been detected, opening up the possibility that one, or a few, bacterial members of the community could be important promoters of antibiotic resistance (AR) dissemination in this environment’s bacterial population. Further studies using the available isolates will likely give insights of the possible mechanisms and genetic elements involved.
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Affiliation(s)
- Benedito Eduardo-Correia
- Department of Molecular Biology, Faculty of Sciences-Biology Building, Universidad Autónoma de Madrid, Madrid, Spain
| | - Héctor Morales-Filloy
- Department of Molecular Biology, Faculty of Sciences-Biology Building, Universidad Autónoma de Madrid, Madrid, Spain
| | - José P Abad
- Department of Molecular Biology, Faculty of Sciences-Biology Building, Universidad Autónoma de Madrid, Madrid, Spain
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25
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Lu XM, Lu PZ. Distribution of antibiotic resistance genes in soil amended using Azolla imbricata and its driving mechanisms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 692:422-431. [PMID: 31351286 DOI: 10.1016/j.scitotenv.2019.07.285] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 07/16/2019] [Accepted: 07/17/2019] [Indexed: 06/10/2023]
Abstract
The floating aquatic plant of Azolla imbricata has an outstanding purification capability for polluted river water, and it is also employed to improve soil fertility. However, the occurrence and distribution of antibiotic resistance genes (ARGs) in soil amended using A.imbricata remain unclear. In the soil amendment with A. imbricata, heavy metals, antibiotics, transposase genes, ARGs, and bacterial communities in the soil were determined in this study. The results indicated that the diversity of bacteria and ARGs increased, while the diversity of ARGs decreased under the amendment using an appropriate amount of A. imbricata. The Firmicutes, Chloroflexi, Actinobacteria, and Cyanobacteria were the main host bacteria of ARGs. The vertical gene transfer of ARGs was weak, and the horizontal gene transfer became the dominant transfer pathway of ARGs. The amendment with A. imbricata altered the distribution of heavy metals, antibiotics, transposase genes, ARGs, and dominant bacteria. The amendment using A. imbricata promoted the degradation of antibiotics, decreased the concentrations of available heavy metals, and eliminated the abundance of ARGs and transposase genes. Our findings suggested a comprehensive effect of multiple stresses on the fate of ARGs in soil amended with A. imbricata, providing an insight into the distribution and propagation of ARGs in soil amended using plant residues.
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Affiliation(s)
- Xiao-Ming Lu
- School of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, China.
| | - Peng-Zhen Lu
- Faculty of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China
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26
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Marano RBM, Zolti A, Jurkevitch E, Cytryn E. Antibiotic resistance and class 1 integron gene dynamics along effluent, reclaimed wastewater irrigated soil, crop continua: elucidating potential risks and ecological constraints. WATER RESEARCH 2019; 164:114906. [PMID: 31377529 DOI: 10.1016/j.watres.2019.114906] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 07/20/2019] [Accepted: 07/22/2019] [Indexed: 05/10/2023]
Abstract
Reuse of municipal wastewater is a growing global trend, but currently there is lack of consensus regarding the potential dissemination of antibiotic resistance elements by treated wastewater irrigation. We tracked intI1, a proxy for anthropogenic pollution, and an assemblage of antibiotic resistance genes associated with mobile elements and/or wastewater (blaGES, blaOXA2, blaOXA10, blaTEM, blaCTX-M-32 and qnrS) in treated wastewater effluents, effluent stabilization reservoirs, and along irrigation water-soil-crop continua in experimental lysimeters and large-scale commercial fields. While several of the targeted antibiotic resistance genes were profuse in effluents, there was almost no correlation between gene abundance in irrigation water and those detected in soil, and no evidence of systematic gene transfer to irrigated soil or crops. In contrast, soil intI1 abundance correlated strongly to irrigation water levels in lysimeters and sandy field soils, but this was not the case for clay-rich soils or for most of the analyzed crops, suggesting that intI1 may not always be a reliable marker for tracking the impact of treated wastewater irrigation. We hypothesize that "ecological boundaries" expedited by biotic and abiotic factors constrain dissemination of antibiotic resistance elements, and assert that a more holistic perception of these factors is crucial for understanding and managing antibiotic resistance dissemination.
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Affiliation(s)
- Roberto B M Marano
- Department of Soil Chemistry, Plant Nutrition and Microbiology, Institute of Soil, Water and Environmental Sciences, The Volcani Center, Agricultural Research Organization, Rishon Lezion, Israel; Department of Agroecology and Plant Health, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Avihai Zolti
- Department of Soil Chemistry, Plant Nutrition and Microbiology, Institute of Soil, Water and Environmental Sciences, The Volcani Center, Agricultural Research Organization, Rishon Lezion, Israel; Department of Agroecology and Plant Health, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Edouard Jurkevitch
- Department of Agroecology and Plant Health, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Eddie Cytryn
- Department of Soil Chemistry, Plant Nutrition and Microbiology, Institute of Soil, Water and Environmental Sciences, The Volcani Center, Agricultural Research Organization, Rishon Lezion, Israel.
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27
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Ahmed W, Zhang Q, Lobos A, Senkbeil J, Sadowsky MJ, Harwood VJ, Saeidi N, Marinoni O, Ishii S. Precipitation influences pathogenic bacteria and antibiotic resistance gene abundance in storm drain outfalls in coastal sub-tropical waters. ENVIRONMENT INTERNATIONAL 2018; 116:308-318. [PMID: 29754026 DOI: 10.1016/j.envint.2018.04.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 03/13/2018] [Accepted: 04/02/2018] [Indexed: 05/23/2023]
Abstract
Stormwater contamination can threaten the health of aquatic ecosystems and human exposed to runoff via nutrient and pathogen influxes. In this study, the concentrations of 11 bacterial pathogens and 47 antibiotic resistance genes (ARGs) were determined by using high-throughput microfluidic qPCR (MFQPCR) in several storm drain outfalls (SDOs) during dry and wet weather in Tampa Bay, Florida, USA. Data generated in this study were also compared with the levels of fecal indicator bacteria (FIB) and sewage-associated molecular markers (i.e., Bacteroides HF183 and crAssphage markers) in same SDOs collected in a recent study (Ahmed et al., 2018). Concentration of FIB, sewage-associated markers, bacterial pathogens and many ARGs in water samples were relatively high and SDOs may be potentially hotspots for microbial contamination in Tampa Bay. Mean concentrations of culturable E. coli and Enterococcus spp. were tenfold higher in wet compared to dry weather. The majority of microbiological contaminants followed this trend. E. coli eaeA, encoding the virulence factor intimin, was correlated with levels of 20 ARGs, and was more frequently detected in wet weather than dry weather samples. The blaKPC gene associated with carbapenem resistant Enterobacteriaceae and the beta-lactam resistant gene (blaNPS) were only detected in wet weather samples. Frequency of integron genes Intl2 and Intl3 detection increased by 42% in wet weather samples. Culturable E. coli and Enterococcus spp. significantly correlated with 19 of 47 (40%) ARG tested. Sewage-associated markers crAssphage and HF183 significantly correlated (p < 0.05) with the following ARGs: intl1, sul1, tet(M), ampC, mexB, and tet(W). The presence of sewage-associated marker genes along with ARGs associated with sewage suggested that aging sewage infrastructure contributed to contaminant loading in the Bay. Further research should focus on collecting spatial and temporal data on the microbiological contaminants especially viruses in SDOs.
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Affiliation(s)
- Warish Ahmed
- CSIRO Land and Water, Ecosciences Precinct, 41 Boggo Road, Qld 4102, Australia.
| | - Qian Zhang
- BioTechnology Institute, University of Minnesota, 140 Gortner Laboratory, 1479 Gortner Ave, St. Paul, MN 55108, USA
| | - Aldo Lobos
- Integrative Biology, University of South Florida, 4202 East Fowler Ave, Tampa, FL 33620, USA
| | - Jacob Senkbeil
- Integrative Biology, University of South Florida, 4202 East Fowler Ave, Tampa, FL 33620, USA
| | - Michael J Sadowsky
- BioTechnology Institute, University of Minnesota, 140 Gortner Laboratory, 1479 Gortner Ave, St. Paul, MN 55108, USA; Department of Soil, Water, and Climate, University of Minnesota, 439 Borlaug Hall, 1991 Upper Buford Circle, St. Paul, MN 55108, USA
| | - Valerie J Harwood
- Integrative Biology, University of South Florida, 4202 East Fowler Ave, Tampa, FL 33620, USA
| | - Nazanin Saeidi
- Future Cities Laboratory, Singapore ETH-Centre, 1 Create Way, #06-01 Create Tower, 138602, Singapore
| | - Oswald Marinoni
- CSIRO Land and Water, Ecosciences Precinct, 41 Boggo Road, Qld 4102, Australia
| | - Satoshi Ishii
- BioTechnology Institute, University of Minnesota, 140 Gortner Laboratory, 1479 Gortner Ave, St. Paul, MN 55108, USA; Department of Soil, Water, and Climate, University of Minnesota, 439 Borlaug Hall, 1991 Upper Buford Circle, St. Paul, MN 55108, USA
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Tan L, Li L, Ashbolt N, Wang X, Cui Y, Zhu X, Xu Y, Yang Y, Mao D, Luo Y. Arctic antibiotic resistance gene contamination, a result of anthropogenic activities and natural origin. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 621:1176-1184. [PMID: 29070451 DOI: 10.1016/j.scitotenv.2017.10.110] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 10/10/2017] [Accepted: 10/12/2017] [Indexed: 06/07/2023]
Abstract
The increasing global prevalence of antibiotic resistance genes (ARGs) in the environment is attributed to anthropogenic activities, particularly the misuse of antimicrobial drugs in human care and animal production. In the present study, we first examined Arctic/sub-Arctic (polar) sediments for the abundance and diversity of 30 ARGs against sulfonamide, tetracycline, aminoglycoside, quinolone, macrolide, and β-lactam antibiotics. Polar sediment ARGs were detected by qPCR at relatively low levels (10-9 to 10-5 copies/16S rRNA gene copies) compared to the reference sites, which were heavily impacted regions of China (the Haihe River, the Tianjin Water Park water and the Qilihai Wetland water, at 10-8 to 10-2 copies/16S rRNA gene copies). A human mitochondrial gene target, Hmt, was first used to aid in the identification of ARGs associated with anthropogenic activities, being relatively persistent, in high copy number and a human-specific molecular marker. Hmt was consistently present in easily quantifiable amounts in the polar sediment samples, indicating their relationship with human-impact, and it was also positively correlated with the relative abundance of ARGs and to the concentrations of modern-day antibiotics. Phylogenetic analyses of resistance sequences from both the Arctic marine sediments and a major database of human pathogens indicated that the ARGs in polar region were the result of a mix of human influence and natural origins. To our knowledge, this is the first study to show that ARGs in Arctic marine sediments appear to be a mixture of both natural origins and recent human influence. This study provides a significant reference regarding the global reach of antibiotic resistance, which is associated with anthropogenic activities.
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Affiliation(s)
- Lu Tan
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, China
| | - Linyun Li
- School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - Nicholas Ashbolt
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, China; School of Public Health, University of Alberta, Edmonton, AB, Canada
| | - Xiaolong Wang
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, China
| | - Yuxiao Cui
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, China
| | - Xiao Zhu
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, China
| | - Yan Xu
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, China
| | - Yang Yang
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, China
| | - Daqing Mao
- School of Medicine, Nankai University, Tianjin, China.
| | - Yi Luo
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, China.
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Bueno I, Williams-Nguyen J, Hwang H, Sargeant JM, Nault AJ, Singer RS. Systematic Review: Impact of point sources on antibiotic-resistant bacteria in the natural environment. Zoonoses Public Health 2018; 65:e162-e184. [PMID: 29205899 DOI: 10.1111/zph.12426] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Indexed: 11/02/2023]
Abstract
Point sources such as wastewater treatment plants and agricultural facilities may have a role in the dissemination of antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARG). To analyse the evidence for increases in ARB in the natural environment associated with these point sources of ARB and ARG, we conducted a systematic review. We evaluated 5,247 records retrieved through database searches, including both studies that ascertained ARG and ARB outcomes. All studies were subjected to a screening process to assess relevance to the question and methodology to address our review question. A risk of bias assessment was conducted upon the final pool of studies included in the review. This article summarizes the evidence only for those studies with ARB outcomes (n = 47). Thirty-five studies were at high (n = 11) or at unclear (n = 24) risk of bias in the estimation of source effects due to lack of information and/or failure to control for confounders. Statistical analysis was used in ten studies, of which one assessed the effect of multiple sources using modelling approaches; none reported effect measures. Most studies reported higher ARB prevalence or concentration downstream/near the source. However, this evidence was primarily descriptive and it could not be concluded that there is a clear impact of point sources on increases in ARB in the environment. To quantify increases in ARB in the environment due to specific point sources, there is a need for studies that stress study design, control of biases and analytical tools to provide effect measure estimates.
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Affiliation(s)
- I Bueno
- Department of Veterinary Population Medicine, University of Minnesota, St. Paul, MN, USA
| | - J Williams-Nguyen
- Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, MN, USA
- Department of Epidemiology, University of Washington, Seattle, WA, USA
| | - H Hwang
- Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| | - J M Sargeant
- Department of Population Medicine and Centre for Public Health and Zoonoses, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - A J Nault
- Veterinary Medical Library, University of Minnesota, St. Paul, MN, USA
| | - R S Singer
- Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, MN, USA
- Instituto de Medicina Preventiva Veterinaria, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
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ECDC, EFSA and EMA Joint Scientific Opinion on a list of outcome indicators as regards surveillance of antimicrobial resistance and antimicrobial consumption in humans and food-producing animals. EFSA J 2017; 15:e05017. [PMID: 32625307 PMCID: PMC7009961 DOI: 10.2903/j.efsa.2017.5017] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
ECDC, EFSA and EMA have jointly established a list of harmonised outcome indicators to assist EU Member States in assessing their progress in reducing the use of antimicrobials and antimicrobial resistance (AMR) in both humans and food-producing animals. The proposed indicators have been selected on the basis of data collected by Member States at the time of publication. For humans, the proposed indicators for antimicrobial consumption are: total consumption of antimicrobials (limited to antibacterials for systemic use), ratio of community consumption of certain classes of broad-spectrum to narrow-spectrum antimicrobials and consumption of selected broad-spectrum antimicrobials used in healthcare settings. The proposed indicators for AMR in humans are: meticillin-resistant Staphylococcus aureus and 3rd-generation cephalosporin-resistant Escherichia coli, Klebsiella pneumoniae resistant to aminoglycosides, fluoroquinolones and 3rd-generation cephalosporins, Streptococcus pneumoniae resistant to penicillin and S. pneumoniae resistant to macrolides, and K. pneumoniae resistant to carbapenems. For food-producing animals, indicators for antimicrobial consumption include: overall sales of veterinary antimicrobials, sales of 3rd- and 4th-generation cephalosporins, sales of quinolones and sales of polymyxins. Finally, proposed indicators for AMR in food-producing animals are: full susceptibility to a predefined panel of antimicrobials in E. coli, proportion of samples containing ESBL-/AmpC-producing E. coli, resistance to three or more antimicrobial classes in E. coli and resistance to ciprofloxacin in E. coli. For all sectors, the chosen indicators, which should be reconsidered at least every 5 years, are expected to be valid tools in monitoring antimicrobial consumption and AMR. With the exception of the proposed human AMR indicators, the indicators are in general not suitable to monitor the effects of targeted interventions in a specific sector, such as in a single animal species or animal production sector. Management decisions should never be based on these indicators alone but should take into account the underlying data and their analysis.
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Lawrence SA, Armstrong CB, Patrick WM, Gerth ML. High-Throughput Chemical Screening Identifies Compounds that Inhibit Different Stages of the Phytophthora agathidicida and Phytophthora cinnamomi Life Cycles. Front Microbiol 2017; 8:1340. [PMID: 28769905 PMCID: PMC5515820 DOI: 10.3389/fmicb.2017.01340] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 07/03/2017] [Indexed: 11/29/2022] Open
Abstract
Oomycetes in the genus Phytophthora are among the most damaging plant pathogens worldwide. Two important species are Phytophthora cinnamomi, which causes root rot in thousands of native and agricultural plants, and Phytophthora agathidicida, which causes kauri dieback disease in New Zealand. As is the case for other Phytophthora species, management options for these two pathogens are limited. Here, we have screened over 100 compounds for their anti-oomycete activity, as a potential first step toward identifying new control strategies. Our screening identified eight compounds that showed activity against both Phytophthora species. These included five antibiotics, two copper compounds and a quaternary ammonium cation. These compounds were tested for their inhibitory action against three stages of the Phytophthora life cycle: mycelial growth, zoospore germination, and zoospore motility. The inhibitory effects of the compounds were broadly similar between the two Phytophthora species, but their effectiveness varied widely among life cycle stages. Mycelial growth was most successfully inhibited by the antibiotics chlortetracycline and paromomycin, and the quaternary ammonium salt benzethonium chloride. Copper chloride and copper sulfate were most effective at inhibiting zoospore germination and motility, whereas the five antibiotics showed relatively poor zoospore inhibition. Benzethonium chloride was identified as a promising antimicrobial, as it is effective across all three life cycle stages. While further testing is required to determine their efficacy and potential phytotoxicity in planta, we have provided new data on those agents that are, and those that are not, effective against P. agathidicida and P. cinnamomi. Additionally, we present here the first published protocol for producing zoospores from P. agathidicida, which will aid in the further study of this emerging pathogen.
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Affiliation(s)
| | | | | | - Monica L. Gerth
- Department of Biochemistry, University of OtagoDunedin, New Zealand
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