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Wei X, Liang J, Ning T, Zhang C, Wang J, Tan L, Shen F. Response of soil microbial community structure and function to the sewage leakage: A case study of a 25-year-old cesspool. CHEMOSPHERE 2024; 363:142753. [PMID: 38971439 DOI: 10.1016/j.chemosphere.2024.142753] [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: 02/29/2024] [Revised: 06/07/2024] [Accepted: 07/01/2024] [Indexed: 07/08/2024]
Abstract
Providing many millions of rural households with decentralized sanitation facilities remains challenging. In undeveloped areas, cesspools have still been widely used due to technologically simple and low-cost. However, the influence of cesspools on the surrounding soil remains unclear. In this study, we investigated the influence of a 25-year-old household cesspool on soil physicochemical factors, microbial community composition and function, pathogens and antibiotic resistance genes (ARGs). Soil at the depth around the sewage liquid level (D70) was mostly disturbed where TOC, NO3-N and TP was increased to 16.8 g/kg, 18.2 mg/kg and 1.02 mg/kg respectively. Correspondingly, the element cycling genes of carbon fixation, methanotrophy, nitrogen fixation, ammonia oxidation, and nitrate reduction etc., were increased at D70. Notably, human derived pathogens such as Enterobacter, Salmonella, Pseudomonas aeruginosa, Klebsiella pneumoniae, Prevotella, and Vibrio were highly enriched by 5-10 folders in D70, indicating the potential health risk to human. Mantel tests suggested that EC, TP, pH, NH3-N and particularly NO3-N are important factors that influence the microbial community and element cycling genes in cesspool-affected soil. Overall, this study revealed the impact of household cesspool leakage on the surrounding soil and provided information for the selection and construction of basic sanitation facilities in poor regions.
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Affiliation(s)
- Xiaocheng Wei
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China; Key Laboratory of Rural Toilet and Sewage Treatment Technology, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China
| | - Jiayin Liang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China; Key Laboratory of Rural Toilet and Sewage Treatment Technology, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China
| | - Tianyang Ning
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China; Key Laboratory of Rural Toilet and Sewage Treatment Technology, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China
| | - Chunxue Zhang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China; Key Laboratory of Rural Toilet and Sewage Treatment Technology, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China
| | - Jiarui Wang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China; Key Laboratory of Rural Toilet and Sewage Treatment Technology, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China
| | - Lu Tan
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China; Key Laboratory of Rural Toilet and Sewage Treatment Technology, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China.
| | - Feng Shen
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China; Key Laboratory of Rural Toilet and Sewage Treatment Technology, Ministry of Agriculture and Rural Affairs, No. 31 Fukang Road, Nankai District, Tianjin 300191, China.
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Huang X, Zhao X, Fu L, Yang G, Luo L. The distribution and key influential factors of antibiotic resistance genes in agricultural soils polluted by multiple heavy metals. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2024; 46:385. [PMID: 39167301 DOI: 10.1007/s10653-024-02164-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 08/02/2024] [Indexed: 08/23/2024]
Abstract
Due to anthropogenic activities such as mining, several agricultural soils are polluted by multiple heavy metals. However, it is still unclear whether multiple heavy metals could affect the distribution of antibiotic resistance genes (ARGs), and how metals affect ARGs. To understand ARGs' distribution in heavy metal-polluted soils, we chose soils contaminated by different types and contents of heavy metals to determine the ARGs' number and abundance through high-throughput quantitative real-time PCR (HT-qPCR) in this study. Additionally, the factors affecting ARGs' distribution, such as soil properties, mobile genetic genes (MGEs), and bacterial communities, were explored. The results demonstrated that the sampled soils were primarily contaminated by Cd, As, Pb, and Zn, and the pollution load index (PLI) values of these metals ranged from 1.3 to 2.7, indicating a low to moderate degree of heavy metal contamination. The number and abundance of ARGs ranged from 44 to 113 and from 2.74 × 107 copies/g to 1.07 × 108 copies/g, respectively. Besides, abundant MGEs in soils, ranging from 1.84 × 106 copies/g to 5.82 × 106 copies/g, were observed. The pathway analysis suggested that MGEs were the most important factor directly affecting ARG abundance (0.89). Notably, heavy metals also affected the ARG abundance. Proteobacteria and Actinobacteria, the main heavy metal tolerant bacteria, were found to be the main hosts of ARGs through network analysis. ARG-carrying pathogens (ACPs) in agricultural soils were found to carry MGEs, indicating a high risk of dissemination. This study provided important information for understanding the ARGs' fate and also the key factors affecting ARGs' spread in multiple heavy metal-contaminated soils.
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Affiliation(s)
- Xin Huang
- College of Environmental Sciences, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, People's Republic of China
| | - Xin Zhao
- College of Environmental Sciences, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, People's Republic of China
| | - Li Fu
- College of Environmental Sciences, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, People's Republic of China
| | - Gang Yang
- College of Environmental Sciences, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, People's Republic of China
| | - Ling Luo
- College of Environmental Sciences, Sichuan Agricultural University, 211 Huimin Road, Chengdu, 611130, People's Republic of China.
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Xu Y, Zhang D, Li H, Ye H, Bai M, Jiang G, Li X. Unraveling the determinants of antibiotic resistance evolution in farmland under fertilizations. JOURNAL OF HAZARDOUS MATERIALS 2024; 474:134802. [PMID: 38838525 DOI: 10.1016/j.jhazmat.2024.134802] [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: 04/17/2024] [Revised: 05/22/2024] [Accepted: 06/02/2024] [Indexed: 06/07/2024]
Abstract
Organic fertilization is a major driver potentiating soil antibiotic resistance in farmland. However, it remains unclear how bacterial antibiotic resistance evolves in fertilized soils and even spreads to crops. Compared with no fertilizer and commercial fertilizer treatments, organic fertilizers markedly increased the abundance of soil antibiotic resistance genes (ARGs) but the relatively weaker transfer of resistance genes from soil to crops. The introduction of organic fertilizers enriches the soil with nutrients, driving indigenous microorganisms towards a K-strategy. The pH, EC, and nutrients as key drivers influenced the ARGs abundance. The neutral (pH 7.2), low salt (TDS 1.4 %) and mesotrophic (carbon content 3.54 g/L) habitats similar to the soil environment conditioned by organic fertilizers. These environmental conditions clearly prolonged the persistence of resistant plasmids, and facilitated their dissemination to massive conjugators soil microbiome but not to plant endophytes. This suggested that organic fertilizers inhibited the spread of ARGs to crops. Moreover, the composition of conjugators showed differential selection of resistant plasmids by endophytes under these conditions. This study sheds light on the evolution and dissemination of antibiotic resistance in farmlands and can aid in the development of antimicrobial resistance control strategies in agriculture.
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Affiliation(s)
- Yan Xu
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, MARA, Tianjin and Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin 300191, China.
| | - Dandan Zhang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, MARA, Tianjin and Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin 300191, China; College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China
| | - Houyu Li
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, MARA, Tianjin and Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin 300191, China
| | - Huike Ye
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, MARA, Tianjin and Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin 300191, China
| | - Mohan Bai
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, MARA, Tianjin and Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin 300191, China
| | - Gaofei Jiang
- Key Lab of Organic-based Fertilizers of China and Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing 210095, China.
| | - Xiaojing Li
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, MARA, Tianjin and Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin 300191, China.
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Sun J, Zhang D, Peng S, Yang X, Hua Q, Wang W, Wang Y, Lin X. Critical insights into the Hormesis of antibiotic resistome in saline soil: Implications from salinity regulation. JOURNAL OF HAZARDOUS MATERIALS 2024; 472:134616. [PMID: 38754232 DOI: 10.1016/j.jhazmat.2024.134616] [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: 03/13/2024] [Revised: 04/29/2024] [Accepted: 05/12/2024] [Indexed: 05/18/2024]
Abstract
Soil is recognized as an important reservoir of antibiotic resistance genes (ARGs). However, the effect of salinity on the antibiotic resistome in saline soils remains largely misunderstood. In this study, high-throughput qPCR was used to investigate the impact of low-variable salinity levels on the occurrence, health risks, driving factors, and assembly processes of the antibiotic resistome. The results revealed 206 subtype ARGs across 10 categories, with medium-salinity soil exhibiting the highest abundance and number of ARGs. Among them, high-risk ARGs were enriched in medium-salinity soil. Further exploration showed that bacterial interaction favored the proliferation of ARGs. Meanwhile, functional genes related to reactive oxygen species production, membrane permeability, and adenosine triphosphate synthesis were upregulated by 6.9%, 2.9%, and 18.0%, respectively, at medium salinity compared to those at low salinity. With increasing salinity, the driver of ARGs in saline soils shifts from bacterial community to mobile gene elements, and energy supply contributed 28.2% to the ARGs at extreme salinity. As indicated by the neutral community model, stochastic processes shaped the assembly of ARGs communities in saline soils. This work emphasizes the importance of salinity on antibiotic resistome, and provides advanced insights into the fate and dissemination of ARGs in saline soils.
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Affiliation(s)
- Jianbin Sun
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China
| | - Dan Zhang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China
| | - Shuang Peng
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China; College of Environment and Ecology, Jiangsu Open University, Nanjing 210017, China
| | - Xiaoqian Yang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Qingqing Hua
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Wei Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yiming Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China; College of Agriculture, Ningxia University, Yinchuan 750021, China.
| | - Xiangui Lin
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China
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Dadeh Amirfard K, Moriyama M, Suzuki S, Sano D. Effect of environmental factors on conjugative transfer of antibiotic resistance genes in aquatic settings. J Appl Microbiol 2024; 135:lxae129. [PMID: 38830804 DOI: 10.1093/jambio/lxae129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 04/25/2024] [Accepted: 06/02/2024] [Indexed: 06/05/2024]
Abstract
Antimicrobial-resistance genes (ARGs) are spread among bacteria by horizontal gene transfer, however, the effect of environmental factors on the dynamics of the ARG in water environments has not been very well understood. In this systematic review, we employed the regression tree algorithm to identify the environmental factors that facilitate/inhibit the transfer of ARGs via conjugation in planktonic/biofilm-formed bacterial cells based on the results of past relevant research. Escherichia coli strains were the most studied genus for conjugation experiments as donor/recipient in the intra-genera category. Conversely, Pseudomonas spp., Acinetobacter spp., and Salmonella spp. were studied primarily as recipients across inter-genera bacteria. The conjugation efficiency (ce) was found to be highly dependent on the incubation period. Some antibiotics, such as nitrofurantoin (at ≥0.2 µg ml-1) and kanamycin (at ≥9.5 mg l-1) as well as metallic compounds like mercury (II) chloride (HgCl2, ≥3 µmol l-1), and vanadium (III) chloride (VCl3, ≥50 µmol l-1) had enhancing effect on conjugation. The highest ce value (-0.90 log10) was achieved at 15°C-19°C, with linoleic acid concentrations <8 mg l-1, a recognized conjugation inhibitor. Identifying critical environmental factors affecting ARG dissemination in aquatic environments will accelerate strategies to control their proliferation and combat antibiotic resistance.
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Affiliation(s)
- Katayoun Dadeh Amirfard
- Department of Frontier Science for Advanced Environment, Tohoku University, Aoba 6-6-06, Aramaki, Aoba-ku, Miyagi 980-8579, Japan
| | - Momoko Moriyama
- Department of Frontier Science for Advanced Environment, Tohoku University, Aoba 6-6-06, Aramaki, Aoba-ku, Miyagi 980-8579, Japan
| | - Satoru Suzuki
- Center for Marine Environmental Studies, Ehime University, Bunkyōchō 2-5, Matsuyama, Ehime 790-8577, Japan
| | - Daisuke Sano
- Department of Frontier Science for Advanced Environment, Tohoku University, Aoba 6-6-06, Aramaki, Aoba-ku, Miyagi 980-8579, Japan
- Department of Civil and Environmental Engineering, Tohoku University, Aoba 6-6-06, Aramaki, Aoba-ku, Miyagi 980-8579, Japan
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Fan H, Wang C, Hu Y, Zhao G. Durability Performance of Basalt Fiber-Reinforced Concrete Subjected to Sulfate-Magnesium Combined Attack. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1128. [PMID: 38473599 DOI: 10.3390/ma17051128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 02/25/2024] [Accepted: 02/27/2024] [Indexed: 03/14/2024]
Abstract
In salt lake areas, cast-in situ concrete structures are subjected to long-term corrosion by sulfate and magnesium ions. The properties of concrete can be improved by adding materials like basalt fiber (BF). To investigate the degradation process and mechanism of cast-in situ concrete with premixed BF under the dual corrosion of sulfate and magnesium salts, concrete with a content of BF ranging from 0 to 0.5% was prepared. Specimens were subjected to different internal and external corrosion conditions and immersed for 180 days. Dimension, mass, and appearance changes at different immersion times were recorded. The compressive and flexural strength of the specimens were tested and continually observed throughout the immersion time. Mineral and microstructural changes at different immersion times were determined by the XRD, TG, and SEM analysis methods. Results indicated that external sulfate-internal magnesium combined attack had a significant negative effect on the early strength. The compressive and flexural strength of the corroded specimens decreased by 17.2% and 14.1%, respectively, compared to the control group at 28 days. The premixed magnesium ions caused the decomposition of the C-S-H gel, resulting in severe spalling and lower mechanical properties after immersing for a long time. As the BF can inhibit crack development, the properties of the concrete premixed with BF were improved. Specimens exhibited superior performance at a BF content of 0.5%, resulting in a 16.2% increase in flexural strength. This paper serves as a valuable reference for the application of basalt fiber-reinforced concrete under the challenging conditions of sulfate-magnesium combined attack.
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Affiliation(s)
- Henghui Fan
- College of Water Conservancy and Architectural Engineering, Northwest A&F University, Xianyang 712100, China
| | - Cheng Wang
- College of Water Conservancy and Architectural Engineering, Northwest A&F University, Xianyang 712100, China
| | - Yiqi Hu
- School of Highway, Chang'an University, Xi'an 710064, China
| | - Gaowen Zhao
- School of Highway, Chang'an University, Xi'an 710064, China
- Key Laboratory for Special Area Highway Engineering, Ministry of Education, Chang'an University, Xi'an 716400, China
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Wang D, Ding Q, Zhong Y, Han X, Fu L, Yu J, Li K, You J. Effects of Erythromycin on Nereis succinea and the Intestinal Microbiome across Different Salinity Levels. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:2662-2671. [PMID: 38311984 DOI: 10.1021/acs.est.3c06984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2024]
Abstract
The exposure of aquatic organisms to pollutants often occurs concomitantly with salinity fluctuations. Here, we reported the effects of erythromycin (0.250, 7.21, and 1030 μg/L) on marine invertebrate N. succinea and its intestinal microbiome under varying salinity levels (5‰, 15‰, and 30‰). The salinity elicited significant effects on the growth and intestinal microbiome of N. succinea. The susceptibility of the intestinal microbiome to erythromycin increased by 8.7- and 6.2-fold at salinities of 15‰ and 30‰, respectively, compared with that at 5‰ salinity. Erythromycin caused oxidative stress and histological changes in N. succinea intestines, and inhibited N. succinea growth in a concentration-dependent manner under 30‰ salinity with a maximum inhibition of 25%. At the intestinal microbial level, erythromycin enhanced the total cell counts at 5‰ salinity but reduced them at 15‰ salinity. Under all tested salinities, erythromycin diminished the antibiotic susceptibility of the intestinal microbiome. Two-way ANOVA revealed significant interactive effects (p < 0.05) between salinity and erythromycin on various parameters, including antibiotic susceptibility and intestinal microbial diversity. The present findings demonstrated the significant role of salinity in modulating the impacts of erythromycin, emphasizing the necessity to incorporate salinity fluctuations into environmental risk assessments.
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Affiliation(s)
- Dali Wang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
| | - Qi Ding
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
| | - Yuheng Zhong
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
| | - Xiaofeng Han
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
| | - Long Fu
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
| | - Jing Yu
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
| | - Kunting Li
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
| | - Jing You
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
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Luo Y, Liu C, Wang Y, Yang Y, Mishra S. Occurrence, distribution and their correlation with different parameters of antibiotics and antibiotic resistance genes in lakes of China: A review. MARINE POLLUTION BULLETIN 2023; 193:115189. [PMID: 37354830 DOI: 10.1016/j.marpolbul.2023.115189] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/30/2023] [Accepted: 06/14/2023] [Indexed: 06/26/2023]
Abstract
The exposure of antibiotics and antibiotic resistance genes (ARGs) as potential threats to the environment has raised global concern. This study provides discussion on the emergence and distribution of antibiotics and ARGs in lakes. The correlation of critical water quality parameters with antibiotics and ARGs are evaluated along with their integrative potential ecological risk. Sulfonamides (∼67.18 ng/L) and quinolones (∼77.62 ng/L) were the dominant antibiotics distributed in the aqueous phase, while the quinolones and tetracyclines were the primary contamination factors in the sediment phase. The temporal and spatial distribution revealed that the antibiotic concentrations were significantly lower in summer than other seasons and the lakes in Hebei and Jiangsu provinces exhibited the highest antibiotic pollution. The detection frequency and relative abundance of sul1 gene have been the highest among all detected ARGs. Moreover, ARGs in lakes were driven by several factors, with bacterial communities and mobile genetic elements that prevailed the positive distribution of ARGs. Antibiotics have been identified as critical factors in inducing the propagation of ARGs, which could be further enhanced by chemical contaminants (e.g., heavy metals and nutrients). Involving the risk assessment strategies, research attention should be paid on three antibiotics (ofloxacin, sulfamethoxazole and erythromycin) to strengthen the policy and management of Baiyangdian Lake and East Dongting Lake. This review analysis will provide in-depth understanding to the researchers and policy-makers in formulation of strategies for remediation of antibiotic contamination in the lakes.
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Affiliation(s)
- Yuye Luo
- College of Environment, Hohai University, Nanjing 210098, China.
| | - Cheng Liu
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes of Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China.
| | - Yue Wang
- College of Environment, Hohai University, Nanjing 210098, China
| | - Yuchun Yang
- College of Environment, Hohai University, Nanjing 210098, China
| | - Saurabh Mishra
- College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China
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Wei G, Gao H, Li S, Liu M, Li R, Zhang Y, Shu Q, Wang W, Zhi L, Zeng Y, Na G. The occurrence and abundance of antibiotic resistance genes in rivers of tropical islands: a case of Hainan Island, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:88936-88948. [PMID: 37450180 DOI: 10.1007/s11356-023-28522-9] [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: 03/13/2023] [Accepted: 06/27/2023] [Indexed: 07/18/2023]
Abstract
In this study, the occurrence and distribution of 49 antibiotic resistance genes (ARGs) and two integrase genes (intl1, intl2) in three major rivers of Hainan Island, China, were investigated in July 2021, and to explore the spatial distribution of the target genes in the three rivers with the potential influencing factors such as regional characteristics and environmental factors. The results showed that a total of 46 ARGs and two integrase genes were detected in water and sediment, and the absolute abundance of ARGs ranged from 1.16 × 103 to 2.97 × 107 copies/L and 3.34 × 103-1.55 × 107 copies/g. ARGs of macrolides, aminoglycosides, and sulfonamides were this study's main types of ARGs. The aadA2, tetE, ermF, tetX, aac(6')-Ib, tetW, and qnrS genes are predominant ARGs in the water and sediment of the three rivers. The relative abundance of ARGs shows higher abundance in the midstream and downstream and lower abundance in the upstream and estuarine. After conducting a correlation analysis, it was found that there was a significant positive correlation between the ARGs detected in the water of the three main rivers. However, in sediment, tetC was negatively correlated with tetQ, macB was negatively correlated with ermF and ereA (p < 0.05), while the remaining ARGs showed positive correlations. Specifically, there was no significant positive correlation between tetQ and tetC, macB and ereA, and ermF in the sediments. Among the nine environmental factors studied, pH was found to be the main factor associated with the occurrence of ARGs in the aquatic environment, but it was also significantly associated with only nine ARGs. Among the detected heavy metals, only Cd and Zn showed significant correlations with the two ARGs in the water bodies of the three main rivers. It indicated that the pollution of ARGs in the three major rivers was in the initial stage, the detection abundance was low, the influence of environmental factors was small, and the interaction between ARGs seemed to be the main driving force. This study provides a scientific basis for further understanding the occurrence of ARGs and their influencing factors in a tropical island environment, and lays a foundation for subsequent management.
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Affiliation(s)
- Guangke Wei
- Yazhou Bay Innovation Institute/Hainan Key Laboratory for Coastal Marine Eco-environment and Carbon Sink/College of Ecology and Environment, Hainan Tropical Ocean University, Sanya, 572022, China
| | - Hui Gao
- National Marine Environmental Monitoring Center, Dalian, 116023, China
| | - Shisheng Li
- Yazhou Bay Innovation Institute/Hainan Key Laboratory for Coastal Marine Eco-environment and Carbon Sink/College of Ecology and Environment, Hainan Tropical Ocean University, Sanya, 572022, China
| | - Min Liu
- Yazhou Bay Innovation Institute/Hainan Key Laboratory for Coastal Marine Eco-environment and Carbon Sink/College of Ecology and Environment, Hainan Tropical Ocean University, Sanya, 572022, China
| | - Ruijing Li
- National Marine Environmental Monitoring Center, Dalian, 116023, China
| | - Yintian Zhang
- Yazhou Bay Innovation Institute/Hainan Key Laboratory for Coastal Marine Eco-environment and Carbon Sink/College of Ecology and Environment, Hainan Tropical Ocean University, Sanya, 572022, China
| | - Qin Shu
- National Marine Environmental Monitoring Center, Dalian, 116023, China
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
| | - Wei Wang
- Yazhou Bay Innovation Institute/Hainan Key Laboratory for Coastal Marine Eco-environment and Carbon Sink/College of Ecology and Environment, Hainan Tropical Ocean University, Sanya, 572022, China
| | - Liwen Zhi
- Yazhou Bay Innovation Institute/Hainan Key Laboratory for Coastal Marine Eco-environment and Carbon Sink/College of Ecology and Environment, Hainan Tropical Ocean University, Sanya, 572022, China
| | - Yingxu Zeng
- Yazhou Bay Innovation Institute/Hainan Key Laboratory for Coastal Marine Eco-environment and Carbon Sink/College of Ecology and Environment, Hainan Tropical Ocean University, Sanya, 572022, China
| | - Guangshui Na
- Yazhou Bay Innovation Institute/Hainan Key Laboratory for Coastal Marine Eco-environment and Carbon Sink/College of Ecology and Environment, Hainan Tropical Ocean University, Sanya, 572022, China.
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10
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Kelbrick M, Hesse E, O' Brien S. Cultivating antimicrobial resistance: how intensive agriculture ploughs the way for antibiotic resistance. MICROBIOLOGY (READING, ENGLAND) 2023; 169:001384. [PMID: 37606636 PMCID: PMC10482381 DOI: 10.1099/mic.0.001384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 08/10/2023] [Indexed: 08/23/2023]
Abstract
Antimicrobial resistance (AMR) is a growing threat to public health, global food security and animal welfare. Despite efforts in antibiotic stewardship, AMR continues to rise worldwide. Anthropogenic activities, particularly intensive agriculture, play an integral role in the dissemination of AMR genes within natural microbial communities - which current antibiotic stewardship typically overlooks. In this review, we examine the impact of anthropogenically induced temperature fluctuations, increased soil salinity, soil fertility loss, and contaminants such as metals and pesticides on the de novo evolution and dissemination of AMR in the environment. These stressors can select for AMR - even in the absence of antibiotics - via mechanisms such as cross-resistance, co-resistance and co-regulation. Moreover, anthropogenic stressors can prime bacterial physiology against stress, potentially widening the window of opportunity for the de novo evolution of AMR. However, research to date is typically limited to the study of single isolated bacterial species - we lack data on how intensive agricultural practices drive AMR over evolutionary timescales in more complex microbial communities. Furthermore, a multidisciplinary approach to fighting AMR is urgently needed, as it is clear that the drivers of AMR extend far beyond the clinical environment.
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Affiliation(s)
- Matthew Kelbrick
- Department of Evolution, Ecology and Behaviour, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Crown Street, Liverpool, L69 7ZB, UK
| | - Elze Hesse
- College of Life and Environmental Science, University of Exeter, Penryn, Cornwall, TR10 9FE, UK
| | - Siobhán O' Brien
- Department of Microbiology, Moyne Institute for Preventive Medicine, School of Genetics and Microbiology, Trinity College Dublin, Dublin 2, Republic of Ireland
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11
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Yuan Q, Wang X, Fang H, Cheng Y, Sun R, Luo Y. Coastal mudflats as reservoirs of extracellular antibiotic resistance genes: Studies in Eastern China. J Environ Sci (China) 2023; 129:58-68. [PMID: 36804242 DOI: 10.1016/j.jes.2022.09.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/02/2022] [Accepted: 09/02/2022] [Indexed: 06/18/2023]
Abstract
Despite coastal mudflats serving as essential ecological zones interconnecting terrestrial/freshwater and marine systems, little is known about the profiles of antibiotic resistance genes (ARGs) in this area. In this study, characteristics of typical ARGs, involving both intracellular (iARGs) and extracellular ARGs (eARGs) at different physical states, were explored in over 1000 km of coastal mudflats in Eastern China. Results indicated the presence of iARGs and eARGs at states of both freely present or attached by particles. The abundance of eARGs was significantly higher than that of iARGs (87.3% vs 12.7%), and their dominance was more significant than those in other habitats (52.7%-76.3%). ARG abundance, especially for eARGs, showed an increasing trend (p < 0.05) from southern (Nantong) to northern (Lianyungang) coastal mudflats. Higher salinity facilitated the transformation from iARGs to eARGs, and smaller soil particle size was conducive to the persistence of eARGs in northern coastal mudflats. This study addresses the neglected function of coastal mudflats as eARGs reservoirs.
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Affiliation(s)
- Qingbin Yuan
- College of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
| | - Xiaolin Wang
- College of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Hui Fang
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Yuan Cheng
- College of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Ruonan Sun
- Department of Civil and Environmental Engineering, Rice University, Houston 77005, USA
| | - Yi Luo
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
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12
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Zhou Q, Zhang J, Fang Q, Zhang M, Wang X, Zhang D, Pan X. Microplastic biodegradability dependent responses of plastisphere antibiotic resistance to simulated freshwater-seawater shift in onshore marine aquaculture zones. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 331:121828. [PMID: 37187278 DOI: 10.1016/j.envpol.2023.121828] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 05/09/2023] [Accepted: 05/13/2023] [Indexed: 05/17/2023]
Abstract
MPs carrying ARGs can travel between freshwater and seawater due to intensive land-sea interaction in onshore marine aquaculture zones (OMAZ). However, the response of ARGs in plastisphere with different biodegradability to freshwater-seawater shift is still unknown. In this study, ARG dynamics and associated microbiota on biodegradable poly (butyleneadipate-co-terephthalate) (PBAT) and non-biodegradable polyethylene terephthalate (PET) MPs were investigated through a simulated freshwater-seawater shift. The results exhibited that freshwater-seawater shift significantly influenced ARG abundance in plastisphere. The relative abundance of most studied ARGs decreased rapidly in plastisphere after they entered seawater from freshwater but increased on PBAT after MPs entered freshwater from seawater. Besides, the high relative abundance of multi-drug resistance (MDR) genes occurred in plastisphere, and the co-change between most ARGs and mobile genetic elements indicated the role of horizontal gene transfer on ARG regulation. Proteobacteria was dominant phylum in plastisphere and the dominant genera, such as Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium, Afipia, Gemmobacter and Enhydrobacter, were significantly associated with qnrS, tet and MDR genes in plastisphere. Moreover, after MPs entered new water environment, the ARGs and microbiota genera in plastisphere changed significantly and tended to converge with those in receiving water. These results indicated that MP biodegradability and freshwater-seawater interaction influenced potential hosts and distributions of ARGs, of which biodegradable PBAT posed a high risk in ARG dissemination. This study would be helpful for understanding the impact of biodegradable MP pollution on spread of antibiotic resistance in OMAZ.
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Affiliation(s)
- Qian Zhou
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Jun Zhang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Qunkai Fang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Ming Zhang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Xiaonan Wang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Daoyong Zhang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China.
| | - Xiangliang Pan
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
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13
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Li B, Jeon MK, Li X, Yan T. Differential impacts of salinity on antibiotic resistance genes during cattle manure stockpiling are linked to mobility potentials revealed by metagenomic sequencing. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130590. [PMID: 37055994 DOI: 10.1016/j.jhazmat.2022.130590] [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: 07/07/2022] [Revised: 11/09/2022] [Accepted: 12/08/2022] [Indexed: 06/19/2023]
Abstract
Livestock manure is an important source of antibiotic resistance genes (ARGs), and its salinity level can change during stockpiling. To understand how the salinity changes affect the fate of ARGs, cattle manure was adjusted of salinity and stockpiled in laboratory microcosms at low (0.3% salt), moderate (3.0%) and high salinity levels (10.0%) for 44 days. Amongst the five ARGs (tetO, blaTEM, sul1, tetM, and ermB) and the first-class integrase (intI1) monitored by qPCR, the relative abundance of tetO and blaTEM exhibited no clear trend in response to salinity levels, while that of sul1, tetM, ermB and intI1 showed clear downward trends over time at the lower salinity levels (0.3% and 3%) but not at the high salinity level (10%). Metagenomic contig construction of cattle manure samples revealed that sul1, tetM and ermB genes were more likely to associate with mobile genetic elements (MGEs) than tetO and blaTEM, suggesting that their slower decay at higher salinity levels was either caused by horizontal gene transfer or co-selection of ARGs and osmotic stress resistant determinants. Further analysis of metagenomic contigs showed that osmotic stress resistance can also be located on MGEs or in conjunction with ARGs.
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Affiliation(s)
- Bo Li
- Department of Civil and Environmental Engineering, Water Resources Research Center, University of Hawaii at Manoa, Honolulu, HI 96822, United States
| | - Min Ki Jeon
- Department of Civil and Environmental Engineering, Water Resources Research Center, University of Hawaii at Manoa, Honolulu, HI 96822, United States
| | - Xu Li
- Department of Civil and Environmental Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, United States
| | - Tao Yan
- Department of Civil and Environmental Engineering, Water Resources Research Center, University of Hawaii at Manoa, Honolulu, HI 96822, United States; Water Resources Research Center, University of Hawaii at Manoa, Honolulu, HI 96822, United States.
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14
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Xu Y, You G, Yin J, Zhang M, Peng D, Xu J, Yang S, Hou J. Salt tolerance evolution facilitates antibiotic resistome in soil microbiota: Evidences from dissemination evaluation, hosts identification and co-occurrence exploration. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 317:120830. [PMID: 36481466 DOI: 10.1016/j.envpol.2022.120830] [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: 08/10/2022] [Revised: 11/26/2022] [Accepted: 12/04/2022] [Indexed: 06/17/2023]
Abstract
Salinity is considered as one of the vital factors affecting the profiles of antibiotic resistance genes (ARGs) in soils, whereby its roles in shaping the antibiotic resistome were still poorly understood. Here, metagenomic analysis was conducted to track the ARGs distributions and dissemination in soils during salt accumulation and desalinization processes. Neutral-salt accumulation for 45 and 90 days significantly increased the relative abundances of ARGs and mobile genetic elements (MGEs) carrying antibiotic resistance contigs (ARCs). The ARGs within antibiotic efflux and target protection families primarily carried by Streptomyces, Nocardioides, Rhodanobacter and Monashia were largely enriched by salinity. The ARGs subtypes of the resistance-nodulation-division (RND) family, ATP-binding cassette (ABC) family, rRNA methyltransferase and other efflux were closely associated with MGEs, contributing to the enrichment of ARGs. Moreover, the ARGs subtypes and transposons were genetically linked with the salt-tolerance mechanisms of organic osmolyte transporters and K+ uptake proteins on the same ARC, demonstrating the coselection of ARGs and halotolerant genes. Furthermore, the antibiotic resistome could recover to a normal state after the prolonged incubation by alleviating salt stress. Nevertheless, the acquisition of ARGs by opportunistic pathogens after salt treatment was increased, serving to prioritize further efforts on the health risks correlated with resistance propagation and human exposure in saline soils.
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Affiliation(s)
- Yi Xu
- College of Agricultural Science and Engineering, Hohai University, Nanjing, People's Republic of China, 210098.
| | - Guoxiang You
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing, People's Republic of China, 210098
| | - Jinbao Yin
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing, People's Republic of China, 210098
| | - Mairan Zhang
- College of Agricultural Science and Engineering, Hohai University, Nanjing, People's Republic of China, 210098
| | - Dengyun Peng
- College of Agricultural Science and Engineering, Hohai University, Nanjing, People's Republic of China, 210098
| | - Junzeng Xu
- College of Agricultural Science and Engineering, Hohai University, Nanjing, People's Republic of China, 210098; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, PR China
| | - Shihong Yang
- College of Agricultural Science and Engineering, Hohai University, Nanjing, People's Republic of China, 210098; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, PR China.
| | - Jun Hou
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing, People's Republic of China, 210098
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15
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Wu D, Zhao J, Su Y, Yang M, Dolfing J, Graham DW, Yang K, Xie B. Explaining the resistomes in a megacity's water supply catchment: Roles of microbial assembly-dominant taxa, niched environments and pathogenic bacteria. WATER RESEARCH 2023; 228:119359. [PMID: 36423548 DOI: 10.1016/j.watres.2022.119359] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 10/30/2022] [Accepted: 11/12/2022] [Indexed: 06/16/2023]
Abstract
Antibiotic resistance genes (ARGs) in drinking water sources suggest the possible presence of resistant microorganisms that jeopardize human health. However, explanations for the presence of specific ARGs in situ are largely unknown, especially how their prevalence is affected by local microbial ecology, taxa assembly and community-wide gene transfer. Here, we characterized resistomes and bacterial communities in the Taipu River catchment, which feeds a key drinking water reservoir to a global megacity, Shanghai. Overall, ARG abundances decreased significantly as the river flowed downstream towards the reservoir (P < 0.01), whereas the waterborne bacteria assembled deterministically (|βNRI| > 2.0) as a function of temperature and dissolved oxygen conditions with the assembly-dominant taxa (e.g. Ilumatobacteraceae and Cyanobiaceae) defining local resistomes (P < 0.01, Cohen's D = 4.22). Bacterial hosts of intragenomic ARGs stayed at the same level across the catchment (60 ∼ 70 genome copies per million reads). Among them, the putative resistant pathogens (e.g. Burkholderiaceae) carried mixtures of ARGs that exhibited high transmission probability (transfer counts = 126, P < 0.001), especially with the microbial assembly-dominant taxa. These putative resistant pathogens had densities ranging form 3.0 to 4.0 × 106 cell/L, which was more pronouncedly affected by resistome and microbial assembly structures than environmental factors (SEM, std-coeff β = 0.62 vs. 0.12). This work shows that microbial assembly and resistant pathogens play predominant roles in prevelance and dissemination of resistomes in receiving water, which deserves greater attention in devisng control strategies for reducing in-situ ARGs and resistant strains in a catchment.
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Affiliation(s)
- Dong Wu
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China; Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guizhou 550001, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Jue Zhao
- Department of Civil and Environmental Engineering and Research Institute for Sustainable Urban Development, The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Yinglong Su
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Mengjie Yang
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China
| | - Jan Dolfing
- Faculty Energy and Environment, Northumbria University, Newcastle upon Tyne, NE1 8QH, UK
| | - David W Graham
- School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK.
| | - Kai Yang
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
| | - Bing Xie
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
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16
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Li W, Zhang WG, Zhang MS, Lei ZF, Li PF, Ma Y, Gao Y. Environmentally relevant concentrations of mercury facilitate the horizontal transfer of plasmid-mediated antibiotic resistance genes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 852:158272. [PMID: 36028018 DOI: 10.1016/j.scitotenv.2022.158272] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/20/2022] [Accepted: 08/21/2022] [Indexed: 06/15/2023]
Abstract
Abundant antibiotic resistance genes (ARGs) are typically found in mercury (Hg)-contaminated aquatic environments. This phenomenon is partly attributed to the co-resistance, cross-resistance, and shared regulatory responses to Hg and antibiotics. However, it remains unclear whether and how Hg influences the conjugative transfer of ARGs mediated by mobilizable plasmids. In the present study, we found that Hg2+ at the environmentally relevant concentrations (0.001-0.5 mg L-1) facilitated the conjugative transfer of ARGs through the mobilizable plasmid RP4 from the donor Escherichia coli HB101 to the recipient E. coli K12. Exposure to Hg2+ significantly increases the formation of reactive oxygen species, malondialdehyde production, antioxidant enzyme activities, and cell membrane permeability, while decreasing the concentration of glutathione. Scanning electron microscopy and transmission electron microscopy showed that the cell membrane suffered from oxidative damage, which is beneficial for conjugative transfer. The expression of global regulatory genes (korA, korB, and trbA) negatively regulating conjugative transfer was restrained by Hg2+, while promoting the expression of positive regulatory genes involved in the mating pair formation system (trbBp and traF) and the DNA transfer and replication systems (trfAp and traJ). Although a high Hg2+ concentration (1.0 mg L-1) suppressed ARGs conjugative transfer, our results suggest that Hg2+ facilitates the dissemination of ARGs in aquatic environments at environmentally relevant concentrations. This study improves our understanding of ARGs dissemination in Hg-contaminated aquatic environments.
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Affiliation(s)
- Wen Li
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Nanjing 210014, China; School of Life Sciences, Nanjing University, Nanjing 210093, China
| | - Wei-Guo Zhang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Nanjing 210014, China; Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Life and Environmental Sciences, University of Tsukuba, Tsukuba 305-8577, Japan; China Ministry of Agriculture Key Laboratory at Yangtze River Plain for Agricultural Environment, Nanjing 210014, China.
| | - Ming-Sha Zhang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhong-Fang Lei
- School of Life and Environmental Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Peng-Fu Li
- School of Life Sciences, Nanjing University, Nanjing 210093, China
| | - Yan Ma
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; National Agricultural Experimental Station for Agricultrual Environment, Luhe, Nanjing 210014, China
| | - Yan Gao
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
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17
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Huang H, Lin L, Bu F, Su Y, Zheng X, Chen Y. Reductive Stress Boosts the Horizontal Transfer of Plasmid-Borne Antibiotic Resistance Genes: The Neglected Side of the Intracellular Redox Spectrum. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:15594-15606. [PMID: 36322896 DOI: 10.1021/acs.est.2c04276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The dissemination of plasmid-borne antibiotic resistance genes (ARGs) among bacteria is becoming a global challenge to the "One Health" concept. During conjugation, the donor/recipient usually encounter diverse stresses induced by the surrounding environment. Previous studies mainly focused on the effects of oxidative stress on plasmid conjugation, but ignored the potential contribution of reductive stress (RS), the other side of the intracellular redox spectrum. Herein, we demonstrated for the first time that RS induced by dithiothreitol could significantly boost the horizontal transfer of plasmid RP4 from Escherichia coli K12 to different recipients (E. coli HB101, Salmonella Typhimurium, and Pseudomonas putida KT2440). Phenotypic and genotypic tests confirmed that RS upregulated genes encoding the transfer apparatus of plasmid RP4, which was attributed to the promoted consumption of intracellular glutamine in the donor rather than the widely reported SOS response. Moreover, RS was verified to benefit ATP supply by activating glycolysis (e.g., GAPDH) and the respiratory chain (e.g., appBC), triggering the deficiency of intracellular free Mg2+ by promoting its binding, and reducing membrane permeability by stimulating cardiolipin biosynthesis, all of which were beneficial to the functioning of transfer apparatus. Overall, our findings uncovered the neglected risks of RS in ARG spreading and updated the regulatory mechanism of plasmid conjugation.
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Affiliation(s)
- Haining Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Lin Lin
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Fan Bu
- Shanghai Electric Environmental Protection Group, Shanghai Electric Group Co. Ltd, Shanghai 200092, China
| | - Yinglong Su
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200092, China
| | - Xiong Zheng
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Yinguang Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
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18
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Tang Z, Zhang Y, Xiao S, Gao Y, Duan Y, Liu B, Xiong C, Yang Z, Wu Y, Zhou S. Insight into the impacts and mechanisms of ketone stress on the antibiotic resistance in Escherichia coli. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:83746-83755. [PMID: 35771331 PMCID: PMC9245865 DOI: 10.1007/s11356-022-21600-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 06/16/2022] [Indexed: 06/15/2023]
Abstract
Accumulation of toxic organic has posed a substantial pressure on the proliferation of bacterial resistance. While aromatic organics have been demonstrated to enhance the antibiotic resistance in bacteria, no information is yet available on the effects of non-aromatic organics on the variations of bacterial resistance. Here, we investigated the effects of a typical ketone (i.e., methylisobutanone (MIBK)) on the variations of antibiotic resistance in Escherichia coli (E. coli). The results showed that the growth of resistant E. coli under environmental concentration of 50 μg/L MIBK was firstly inhibited as explained by the transient disruption in the cell membrane and then recovered possibly due to the reactive oxygen species. Exposure to 50 μg/L MIBK gradually raised the abundance of representative resistance gene (ampR) in E. coli. In contrast, the high concentration of 50 mg/L MIBK continuously inhibited the growth of resistant E. coli by disrupting cell membrane and notably promoted the proliferation of ampR through enhancing the horizontal transformation and up-regulating the expression of efflux pump gene. These findings provided the first evidence for the evolution of bacterial resistance in response to ketone organics.
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Affiliation(s)
- Zhenping Tang
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, China
- Hunan Province Key Laboratory of Rare Metal Minerals Exploitation and Geological Disposal of Wastes, University of South China, Hengyang, 421001, China
| | - Yu Zhang
- School of Civil Engineering, University of South China, Hengyang, 421001, China
| | - Shasha Xiao
- School of Civil Engineering, University of South China, Hengyang, 421001, China
| | - Yuanyuan Gao
- Hunan Province Key Laboratory of Rare Metal Minerals Exploitation and Geological Disposal of Wastes, University of South China, Hengyang, 421001, China
| | - Yi Duan
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, China
- School of Civil Engineering, University of South China, Hengyang, 421001, China
| | - Boyang Liu
- School of Civil Engineering, University of South China, Hengyang, 421001, China
| | - Cong Xiong
- School of Civil Engineering, University of South China, Hengyang, 421001, China
| | - Zhengqing Yang
- School of Civil Engineering, University of South China, Hengyang, 421001, China
| | - Yueyue Wu
- Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, 421001, China
| | - Shuai Zhou
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, China.
- Hunan Province Key Laboratory of Rare Metal Minerals Exploitation and Geological Disposal of Wastes, University of South China, Hengyang, 421001, China.
- School of Civil Engineering, University of South China, Hengyang, 421001, China.
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19
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Mira P, Lozano‐Huntelman N, Johnson A, Savage VM, Yeh P. Evolution of antibiotic resistance impacts optimal temperature and growth rate in
Escherichia coli
and
Staphylococcus epidermidis. J Appl Microbiol 2022; 133:2655-2667. [DOI: 10.1111/jam.15736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/19/2022] [Accepted: 07/21/2022] [Indexed: 11/27/2022]
Affiliation(s)
- Portia Mira
- Department of Ecology and Evolutionary Biology University of California Los Angeles U.S.A
| | | | - Adrienne Johnson
- Department of Ecology and Evolutionary Biology University of California Los Angeles U.S.A
| | - Van M. Savage
- Department of Ecology and Evolutionary Biology University of California Los Angeles U.S.A
- Department of Computational Medicine, David Geffen School of Medicine University of California Los Angeles U.S.A
- Santa Fe Institute Santa Fe New Mexico U.S.A
| | - Pamela Yeh
- Department of Ecology and Evolutionary Biology University of California Los Angeles U.S.A
- Santa Fe Institute Santa Fe New Mexico U.S.A
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20
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Qing L, Qigen D, Jian H, Hongjun W, Jingdu C. Profiles of tetracycline resistance genes in paddy soils with three different organic fertilizer applications. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 306:119368. [PMID: 35489540 DOI: 10.1016/j.envpol.2022.119368] [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: 10/07/2021] [Revised: 04/01/2022] [Accepted: 04/24/2022] [Indexed: 06/14/2023]
Abstract
The rapid expansion of organic rice cultivation areas have been accompanied by increased application of organic fertilizers. The high prevalence of soil antibiotic resistance caused by organic fertilizer application poses a severe threat to the agricultural and soil ecosystems. To date, research efforts and understanding of the effects and mechanism of action of the various organic fertilizers on antibiotic resistance in paddy soils remain poorly investigated. Tetracycline resistance genes (TRGs, including tetB, tetC, tetL, tetZ, tetM, tetO, tetT, and tetX), class 1 integron-integrase gene (intI1) and bacterial communities were characterized using quantitative-PCR and Illumina MiSeq sequencing, in paddy soils exposed to inorganic fertilizer (NPK), animal-derived organic fertilizer (AOF, composted swine and/or chicken manure), plant-derived organic fertilizer (POF, rapeseed cake and/or astragalus) and commercial organic fertilizer (COF, composted of animal manure mix with crop residues) applications. Compared with NPK, AOF applications significantly increased the relative abundance of TRGs, which was predominantly expressed in the increase of the relative abundance of tetC, tetM, tetO, tetT, and tetX, while POF and COF had no significant effect on the relative abundance of TRGs. Principal coordinate analysis revealed that AOF and POF significantly altered bacterial communities in paddy soils relative to NPK, while COF had no significant change of bacterial communities. Variation partitioning analysis indicated that soil physicochemical properties were the decisive factors for the changes of TRGs in organic paddy fields. Furthermore, redundancy analysis and the Mantel test showed that TRG profiles in AOF applied paddy soils were strongly influenced by electrical conductivity (EC). Total nitrogen (TN) and organic matter (OM) affected the distribution of TRGs in COF and POF applied paddy soils through a different mechanism. This study provides insights into the impacts of different types of organic fertilizer on the profiles of TRGs in paddy soils.
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Affiliation(s)
- Li Qing
- Jiangsu Key Laboratory of Crop Genetic and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops/Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou, 225009, China
| | - Dai Qigen
- Jiangsu Key Laboratory of Crop Genetic and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops/Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou, 225009, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu 225009, China.
| | - Hu Jian
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, China
| | - Wu Hongjun
- Yangzhou Supervision & Inspection Center for Agri-products, Yangzhou, 225101, China
| | - Chen Jingdu
- Yangzhou Municipal Bureau of Agriculture and Rural Affairs, Yangzhou, 225000, China
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21
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Kaviani Rad A, Balasundram SK, Azizi S, Afsharyzad Y, Zarei M, Etesami H, Shamshiri RR. An Overview of Antibiotic Resistance and Abiotic Stresses Affecting Antimicrobial Resistance in Agricultural Soils. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:4666. [PMID: 35457533 PMCID: PMC9025980 DOI: 10.3390/ijerph19084666] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/22/2022] [Accepted: 01/25/2022] [Indexed: 01/29/2023]
Abstract
Excessive use of antibiotics in the healthcare sector and livestock farming has amplified antimicrobial resistance (AMR) as a major environmental threat in recent years. Abiotic stresses, including soil salinity and water pollutants, can affect AMR in soils, which in turn reduces the yield and quality of agricultural products. The objective of this study was to investigate the effects of antibiotic resistance and abiotic stresses on antimicrobial resistance in agricultural soils. A systematic review of the peer-reviewed published literature showed that soil contaminants derived from organic and chemical fertilizers, heavy metals, hydrocarbons, and untreated sewage sludge can significantly develop AMR through increasing the abundance of antibiotic resistance genes (ARGs) and antibiotic-resistant bacteria (ARBs) in agricultural soils. Among effective technologies developed to minimize AMR's negative effects, salinity and heat were found to be more influential in lowering ARGs and subsequently AMR. Several strategies to mitigate AMR in agricultural soils and future directions for research on AMR have been discussed, including integrated control of antibiotic usage and primary sources of ARGs. Knowledge of the factors affecting AMR has the potential to develop effective policies and technologies to minimize its adverse impacts.
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Affiliation(s)
- Abdullah Kaviani Rad
- Department of Soil Science, School of Agriculture, Shiraz University, Shiraz 71946-85111, Iran;
| | - Siva K. Balasundram
- Department of Agriculture Technology, Faculty of Agriculture, University Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Shohreh Azizi
- UNESCO-UNISA Africa Chair in Nanosciences and Nanotechnology, College of Graduate Studies, University of South Africa, Pretoria 0003, South Africa;
- Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, Cape Town 7129, South Africa
| | - Yeganeh Afsharyzad
- Department of Microbiology, Faculty of Modern Sciences, The Islamic Azad University of Tehran Medical Sciences, Tehran 19496-35881, Iran;
| | - Mehdi Zarei
- Department of Soil Science, School of Agriculture, Shiraz University, Shiraz 71946-85111, Iran;
- Department of Agriculture and Natural Resources, Higher Education Center of Eghlid, Eghlid 73819-43885, Iran
| | - Hassan Etesami
- Department of Soil Science, University of Tehran, Tehran 14179-35840, Iran;
| | - Redmond R. Shamshiri
- Leibniz Institute for Agricultural Engineering and Bioeconomy, 14469 Potsdam-Bornim, Germany;
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22
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Effect of Essential Oils Supplemented with Caprylic Acid and Sodium Chloride against Faecal ESBL-Producing Escherichia coli Isolated from Pigs. Antibiotics (Basel) 2022; 11:antibiotics11040461. [PMID: 35453213 PMCID: PMC9029664 DOI: 10.3390/antibiotics11040461] [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: 03/11/2022] [Revised: 03/25/2022] [Accepted: 03/28/2022] [Indexed: 11/17/2022] Open
Abstract
The purpose of the present investigation was to compare the antibacterial activity of six commercial and lab-scale extracted essential oils (EOs) alone or in combination with caprylic acid (CA) and sodium chloride (NaCl) against faecal Escherichia coli with and without extended-spectrum beta-lactamase (ESBL) encoding genes, and of isolates classified as multidrug-resistant (MDR). Gas chromatography−mass spectrometry (GC−MS) was used for the analysis of chemical composition of EOs, while the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) assays were carried out to elucidate the antibacterial activity of non-supplemented and supplemented EOs against different resistance levels of E. coli strains. The main compounds in commercial EOs were aromatic monoterpenoids (30−56%) and p-cymene (8−35%), while the main compounds in the lab-scale EOs were aromatic monoterpenoids (12−37%) and γ-terpinene (18−22%). Commercial EOs exhibited superior inhibitory activity of E. coli in comparison to lab-scale produced EOs. Antibacterial activity of EOs was significantly enhanced by enrichment of the EOs with NaCl (p < 0.001) or CA (p = 0.012). Most of the non-supplemented EOs exhibited lower activity against MDR and ESBL producing E. coli. In contrast, EOs supplemented with CA and especially NaCl was equally effective against ESBL and non-ESBL as well as MDR and non-MDR E. coli. It was found that supplementation of EOs with NaCl could enhance the antibacterial activity towards ESBL and MDR E. coli isolates. However, additional studies are needed to clarify the potential risks of developing resistance.
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23
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Liu Y, Neal AL, Zhang X, Fan H, Liu H, Li Z. Cropping system exerts stronger influence on antibiotic resistance gene assemblages in greenhouse soils than reclaimed wastewater irrigation. JOURNAL OF HAZARDOUS MATERIALS 2022; 425:128046. [PMID: 34986574 DOI: 10.1016/j.jhazmat.2021.128046] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 11/28/2021] [Accepted: 12/06/2021] [Indexed: 06/14/2023]
Abstract
The effects of reclaimed wastewater (RW) irrigation on the spread of antibiotic resistance genes (ARGs) in soil is modulated by a myriad of biotic and abiotic factors and their relative significance remains vague. We compared microbial communities, assemblages of genes associated with microbial resistance to antibiotics, biocides and metals, and insertion sequences (ISs) in soils following 16 years of irrigation with groundwater (GW), RW or alternately with GW and RW in two greenhouses with different cropping systems, using shotgun metagenome sequencing. The results showed that cropping system exerted greater influence than irrigation on the profile of ISs and resistance genes. This influence was most strongly associated with concentrations of copper, mercury and perfloxacin in the soils. There was no significant difference in soil ARG profiles between continuous RW irrigation and alternating GW and RW irrigation. Proteobacteria, Actinobacteria and Firmicutes and a limited number of ISs were closely associated with the detected ARGs. Most ARGs were found to co-occur with metal and biocide resistance genes through the mechanism of efflux pumps. These findings highlight the significance of understanding and improving crop management in mitigating the dissemination of ARGs in soils irrigated with RW.
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Affiliation(s)
- Yuan Liu
- Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China
| | - Andrew L Neal
- Department of Sustainable Agriculture Sciences, Rothamsted Research, North Wyke, Devon EX22 2SB, UK
| | - Xiaoxian Zhang
- Department of Sustainable Agriculture Sciences, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK
| | - Haiyan Fan
- Beijing Engineering Research Center for Non-conventional Water Resources Utilization and Water Saving, Beijing Water Science and Technology Institute, Beijing 100048, China
| | - Honglu Liu
- Beijing Engineering Research Center for Non-conventional Water Resources Utilization and Water Saving, Beijing Water Science and Technology Institute, Beijing 100048, China
| | - Zhongyang Li
- Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China.
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24
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Xu Y, You G, Zhang M, Peng D, Jiang Z, Qi S, Yang S, Hou J. Antibiotic resistance genes alternation in soils modified with neutral and alkaline salts: interplay of salinity stress and response strategies of microbes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 809:152246. [PMID: 34896144 DOI: 10.1016/j.scitotenv.2021.152246] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 11/22/2021] [Accepted: 12/04/2021] [Indexed: 06/14/2023]
Abstract
Growing evidence points to the pivotal roles of salt accumulation in mediating antibiotic resistance genes (ARGs) spread in soil, whereas how salt mediates ARGs dissemination remains unknown. Herein, the effects of neutral or alkaline (Ne/Al) salt at low, moderate and high levels (Ne/Al-L, Ne/Al-M, Ne/Al-H) on the dissemination of ten typical ARGs in soils were explored, by simultaneously considering the roles of salinity stress and response strategies of microbes. In the soils amended with Ne/Al-L and Al-M salt, the dissemination of ARGs was negligible and the relative abundances of ARGs and mobile genetic elements (MGEs) were decreased. However, Ne-M and Al-H salt contributed to the dissemination of ARGs in soils, with the significantly increased absolute and relative abundances of ARGs and MGEs. In Ne-H soil, although the absolute abundance of ARGs declined drastically due to serious oxidative damage, their relative abundances were promoted. The facilitated ARGs transfer was potentially related to the excessive generation of intracellular reactive oxygen species and increased activities of DNA repair enzymes involved in SOS system. In addition, the activated intracellular protective response including quorum sensing and energy metabolism largely provided essential factors for ARGs dissemination. The co-occurrence of ARGs and over-expressed salt-tolerant genes in specific halotolerant bacteria further suggested the selection of salt stress on ARGs. Moreover, less disturbance of alkaline salt than neutral salt on ARGs evolution was observed, due to the lower abiotic stress and selective pressure on microbes. This study highlights that soil salinity-sodicity could dose-dependently reshape the dissemination of ARGs and community structure of microbes, which may increase the ecological risks of ARGs in agricultural environment.
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Affiliation(s)
- Yi Xu
- College of Agricultural Science and Engineering, Hohai University, Nanjing, PR China, 210098
| | - Guoxiang You
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing, PR China, 210098
| | - Mairan Zhang
- College of Agricultural Science and Engineering, Hohai University, Nanjing, PR China, 210098
| | - Dengyun Peng
- College of Agricultural Science and Engineering, Hohai University, Nanjing, PR China, 210098
| | - Zewei Jiang
- College of Agricultural Science and Engineering, Hohai University, Nanjing, PR China, 210098
| | - Suting Qi
- College of Agricultural Science and Engineering, Hohai University, Nanjing, PR China, 210098
| | - Shihong Yang
- College of Agricultural Science and Engineering, Hohai University, Nanjing, PR China, 210098; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, PR China.
| | - Jun Hou
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing, PR China, 210098
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25
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Li Y, Zhang C, Mou X, Zhang P, Liang J, Wang Z. Distribution characteristics of antibiotic resistance bacteria and related genes in urban recreational lakes replenished by different supplementary water source. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 85:1176-1190. [PMID: 35228362 DOI: 10.2166/wst.2022.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The distribution characteristics of antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs) in urban recreational water from different water-supply sources might be different. In this study, water samples were collected to detect the antibiotic resistance of heterotrophic bacteria to five antibiotics, and the content, phenotype, gene type and species distribution of resistant bacteria were analyzed. The results showed that the changes of bacteria resistance rate in two lakes to five kinds of antibiotics were synchronous with time, and it would reach its maximum in autumn. The detection of ARGs and int I in 80 resistance strains showed that the detection rate of tetG, tetA and int I was high. Here, 51.25% of the bacteria were doubly resistant to AMP-CTX. The 80 isolate strains were of nine genera and 19 species, among which Bacillus cereus, Escherichia coli, Aeromonas veronii, Aeromonas caviae and Raoultella ornithinolytica were the common ARB species in two lakes. Correlation analysis showed that the water temperature was significantly correlated with the content of ARB in sulfamethoxazole (SMZ) and cefotaxime (CTX) (p < 0.05), and the total phosphorus (TP) in FQ lake was significantly correlated with the content of AMP-resistant bacteria (p < 0.05), while there were no other correlations between the changes of other water quality indexes and the content of ARB (p > 0.05).
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Affiliation(s)
- Yongqiang Li
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China E-mail: ; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Chongmiao Zhang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China E-mail: ; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Xiao Mou
- Shaanxi Institute for Food and Drug Control, Xi'an, 710065, China
| | - Peipei Zhang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China E-mail: ; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Jie Liang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China E-mail: ; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Zhen Wang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China E-mail: ; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
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26
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Huang J, Zhu J, Liu S, Luo Y, Zhao R, Guo F, Li B. Estuarine salinity gradient governs sedimentary bacterial community but not antibiotic resistance gene profile. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:151390. [PMID: 34740654 DOI: 10.1016/j.scitotenv.2021.151390] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 10/29/2021] [Accepted: 10/29/2021] [Indexed: 06/13/2023]
Abstract
Antibiotic resistance gene (ARG) pollution in estuarine environment has drawn great attention, and it is not clear if the physical and chemical parameters such as salinity, total organic carbon, total nitrogen, total phosphorus and antibiotics affects the distribution of ARGs. Herein, we deciphered the ARG profiles and microbial community compositions in sediments from Jiulong River Estuary (JRE) and Min River Estuary (MRE) of China using high-throughput sequencing-based metagenomics analysis. Furthermore, we explored the influence of salinity on bacterial community and ARG profiles. The results showed that Proteobacteria, Chloroflexi, and Acidobacteria were the dominant phyla in these two estuaries. The abundance of ARGs ranged from 1.05 × 10-1 to 2.93 × 10-1 copy of ARG per copy of 16S rRNA gene in all the sediment samples and the profiles of ARGs presented similar patterns in two estuaries. Multidrug resistance genes were the dominant ARG types in both estuaries, with an overall abundance of 2.39 × 10-2-1.07 × 10-1 copy of ARG per copy of 16S rRNA gene, followed by genes conferring resistance to bacitracin and macrolide-lincosamide-streptogramin. Salinity was an important influencing factor on the bacterial community but not on the ARG profiles. Instead, stochastic processes exerted the main influence on the distribution of ARGs. The comparison of ARG profiles among estuary sediments, marine sediments, and samples from anthropogenic pollution environments revealed remarkable similarity of ARG profiles between samples from estuary sediments and those from municipal wastewater treatment plants. These results suggested that the complex emission of anthropogenic pollution could cause the stochastic ecological pattern of ARGs.
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Affiliation(s)
- Jin Huang
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China; Shenzhen Environmental Science and New Energy Laboratory, Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China
| | - Jun Zhu
- School of Life Sciences, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Xiamen University, Xiamen, China
| | - Siguang Liu
- Fujian Institute of Oceanography, Xiamen, China
| | - Yuanrong Luo
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, China
| | - Renxin Zhao
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Feng Guo
- School of Life Sciences, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Xiamen University, Xiamen, China; Key Laboratory of Fujian Provincial University for Microorganism Resource, Xiamen, China.
| | - Bing Li
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China.
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27
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Yanlong C, Kejian Y, Yin Y, Yuhan Z, Huizi M, Cui L, Zhonghui L, Ziru P, Fan C, Jiangtao Y, Xianwei W, Yuheng W. Reductive soil disinfestation attenuates antibiotic resistance genes in greenhouse vegetable soils. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126632. [PMID: 34293692 DOI: 10.1016/j.jhazmat.2021.126632] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 07/09/2021] [Accepted: 07/10/2021] [Indexed: 06/13/2023]
Abstract
Reductive soil disinfestation (RSD) is an emerging technique that ameliorates soil degradation, but its effects against antibiotic resistance genes (ARGs) were unclear. Here, we examined soil properties, ARG types and numbers, and ARG profiles, and bacterial community compositions following 4 soil treatments: control; straw addition (SA); water flooding (WF); and RSD, both straw addition and water flooding. The results showed that the numbers of ARG types and subtypes decreased by 10.8% and 21.1%, respectively, after RSD, and the numbers of ARGs decreased by 18.6%. The attenuated multidrug, beta-lactam, macrolide, and phenicol resistance genes in the RSD soil corresponded to a decreased relative abundance of ARG subtypes (i.e., adeF, mdtM, TypeB_NfxB, mecA, nalC, OXA-60, and cmlA4). Taxa in phyla Proteobacteria, Actinobacteria, and Deinococcus-Thermus were the main hosts for dominant ARG subtypes and were inhibited by RSD. The selected bacterial genera and soil properties explained 83.4% of the variance in ARG composition, suggesting that the improved soil properties and the reduced potential ARG hosts produced by the interactions of straw addition and water flooding are likely responsible for ARG attenuation by RSD. Therefore, RSD has the potential to mitigate ARG pollution in soils.
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Affiliation(s)
- Chen Yanlong
- School of Ecology and Environment, Northwestern Polytechnical University, 710000 Xi'an, Shaanxi, China.
| | - Yang Kejian
- Shaanxi Hydrogeology Engineering Geology and Environment Geology Survey Center, 710068 Xi'an, Shaanxi, China
| | - Ye Yin
- School of Ecology and Environment, Northwestern Polytechnical University, 710000 Xi'an, Shaanxi, China
| | - Zhang Yuhan
- School of Ecology and Environment, Northwestern Polytechnical University, 710000 Xi'an, Shaanxi, China
| | - Mi Huizi
- School of Ecology and Environment, Northwestern Polytechnical University, 710000 Xi'an, Shaanxi, China
| | - Li Cui
- School of Ecology and Environment, Northwestern Polytechnical University, 710000 Xi'an, Shaanxi, China
| | - Li Zhonghui
- Shaanxi Hydrogeology Engineering Geology and Environment Geology Survey Center, 710068 Xi'an, Shaanxi, China
| | - Pei Ziru
- School of Ecology and Environment, Northwestern Polytechnical University, 710000 Xi'an, Shaanxi, China
| | - Chen Fan
- School of Ecology and Environment, Northwestern Polytechnical University, 710000 Xi'an, Shaanxi, China
| | - Yan Jiangtao
- Shaanxi Hydrogeology Engineering Geology and Environment Geology Survey Center, 710068 Xi'an, Shaanxi, China
| | - Wang Xianwei
- Shaanxi Hydrogeology Engineering Geology and Environment Geology Survey Center, 710068 Xi'an, Shaanxi, China
| | - Wang Yuheng
- School of Ecology and Environment, Northwestern Polytechnical University, 710000 Xi'an, Shaanxi, China
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28
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Liang H, Wang F, Mu R, Huang J, Zhao R, Li X, Yu K, Li B. Metagenomics analysis revealing the occurrence of antibiotic resistome in salt lakes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 790:148262. [PMID: 34380279 DOI: 10.1016/j.scitotenv.2021.148262] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/29/2021] [Accepted: 05/31/2021] [Indexed: 06/13/2023]
Abstract
Although antimicrobial resistance genes (ARGs) in dozens of environments have been well documented, the distribution of ARGs in salt lake ecosystems has been less intensively investigated. In this study, the broad-spectrum ARG profiles, microbial community composition and the comprehensive associations between microbiome and antimicrobial resistome in four salt lakes were investigated using a metagenomic approach. A total of 175 ARG subtypes affiliated with 19 ARG types were detected, and ARGs conferring resistance to multidrug, bacitracin, and macrolide-lincosamide-streptogramin (MLS) accounted for 71.2% of the total ARG abundance. However, the abundance of ARGs significantly decreased with the increasing salinity in the lakes. Both ARG profiles and microbial community structure presented remarkable discrepancies in different lakes, as well as in different sample types. Microbes such as genera Azoarcus, Aeromonas, Pseudomonas, and Kocuria, significantly co-occurred with multiple ARGs, indicating that these bacteria are potential ARG hosts in salt lake ecosystems. Collectively, this work provides new insights into the occurrence and distribution of ARGs in salt lake ecosystems.
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Affiliation(s)
- Hebin Liang
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Fan Wang
- School of Atmospheric Sciences, Sun Yat-sen University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China; Key Laboratory of Tropical Atmosphere-Ocean System, Ministry of Education, Zhuhai 519082, China
| | - Rong Mu
- School of Environment and Energy, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
| | - Jin Huang
- Shenzhen Environmental Science and New Energy Laboratory, Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China
| | - Renxin Zhao
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Xiaoyan Li
- Shenzhen Environmental Science and New Energy Laboratory, Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China
| | - Ke Yu
- School of Environment and Energy, Shenzhen Graduate School, Peking University, Shenzhen 518055, China.
| | - Bing Li
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
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29
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Abstract
In order to study and verify if the three corrosive irons of SO42−, Mg2+, and Cl− could promote or inhibit each other in concrete corrosion as time goes by, we take Metakaolin (MK) as the research object to explore the interaction mechanism among ions by testing the physical and mechanical properties, the ion content, the phase composition, and the microstructural changes of the MK concrete under the action of various ion combinations. The results show that during the initial and middle stages of the corrosion (40–80 days), SO42− and Mg2+ are in reciprocal inhibition relation, Cl− could inhibit the action of SO42−, and Mg2+ could promote the diffusion of Cl−. However, at the final stage of corrosion (120 days), SO42− and Mg2+ could mutually promote each other, and both irons could promote the diffusion of Cl−. Mg2+ could mainly produce magnesium hydroxide and M-S-H inside the concrete, SO42− mainly generates the ettringite and gypsum, while Cl− mainly produces Friedel salt and NaCl crystal.
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30
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Yun H, Liang B, Ding Y, Li S, Wang Z, Khan A, Zhang P, Zhang P, Zhou A, Wang A, Li X. Fate of antibiotic resistance genes during temperature-changed psychrophilic anaerobic digestion of municipal sludge. WATER RESEARCH 2021; 194:116926. [PMID: 33618108 DOI: 10.1016/j.watres.2021.116926] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 01/27/2021] [Accepted: 02/11/2021] [Indexed: 06/12/2023]
Abstract
The effects of anaerobic digestion (AD) on the abundance of antibiotic resistance genes (ARGs) are highly related to operational temperature. However, the removal performance of ARGs in psychrophilic AD and changed temperatures simulating variable seasonal temperatures is poorly understood. Herein, we investigated the fate of ARGs, correlated bacterial communities and physicochemical properties of AD operation at psychrophilic (15 ℃), mesophilic (35 ℃), and temperature changed conditions (15 to 35 ℃ and 35 to 15 ℃). The results indicated that ammonia release was positively correlated with temperature. The mesophilic AD facilitated phosphorous intake and ARGs proliferation and selection with oxytetracycline (OTC), while psychrophilic AD was conducive to the removal and control of ARGs if no OTC existed. The diversity and composition of AD bacterial communities were influenced more by temperature than OTC. The dominant genera like Candidatus_Microthrix and Acinetobacter had dramatical abundance discrepancies at different temperatures and were obviously positively correlated with ARGs (tet39, tetC and mexD), mobile genetic elements (MGEs) intI, insert sequences (IS) and plasmid. The physicochemical properties of AD influenced the bacterial richness, which in turn significantly correlated with the ARGs abundances. Therefore, ARGs removal could be potentially optimized by eliminating bacterial hosts with deteriorated living conditions and decreased nutrients. This study clarified the response of antibiotic resistome to different temperature variation and highlighted the potential strategies for improved ARGs removal in AD.
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Affiliation(s)
- Hui Yun
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China; Key Laboratory for Resources Utilization Technology of Unconventional Water of Gansu Province, Gansu Academy of Membrane Science and Technology, Lanzhou 730020, China; Gansu Key Laboratory of Biomonitoring and Bioremediation for Environment Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Bin Liang
- School of Civil & Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China.
| | - Yangcheng Ding
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Si Li
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China; Key Laboratory for Resources Utilization Technology of Unconventional Water of Gansu Province, Gansu Academy of Membrane Science and Technology, Lanzhou 730020, China; Gansu Key Laboratory of Biomonitoring and Bioremediation for Environment Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Zhenfei Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China; Key Laboratory for Resources Utilization Technology of Unconventional Water of Gansu Province, Gansu Academy of Membrane Science and Technology, Lanzhou 730020, China; Gansu Key Laboratory of Biomonitoring and Bioremediation for Environment Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Aman Khan
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China; Key Laboratory for Resources Utilization Technology of Unconventional Water of Gansu Province, Gansu Academy of Membrane Science and Technology, Lanzhou 730020, China; Gansu Key Laboratory of Biomonitoring and Bioremediation for Environment Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Peng Zhang
- Key Laboratory for Resources Utilization Technology of Unconventional Water of Gansu Province, Gansu Academy of Membrane Science and Technology, Lanzhou 730020, China
| | - Pengyun Zhang
- Key Laboratory for Resources Utilization Technology of Unconventional Water of Gansu Province, Gansu Academy of Membrane Science and Technology, Lanzhou 730020, China
| | - Aijuan Zhou
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Aijie Wang
- School of Civil & Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Xiangkai Li
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China; Key Laboratory for Resources Utilization Technology of Unconventional Water of Gansu Province, Gansu Academy of Membrane Science and Technology, Lanzhou 730020, China; Gansu Key Laboratory of Biomonitoring and Bioremediation for Environment Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu, China.
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A Research on Durability Degradation of Mineral Admixture Concrete. MATERIALS 2021; 14:ma14071752. [PMID: 33918276 PMCID: PMC8038171 DOI: 10.3390/ma14071752] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/28/2021] [Accepted: 03/29/2021] [Indexed: 11/23/2022]
Abstract
In order to study the degradation laws and mechanisms of admixture concretes with single-added SO42− and composite of Mg2+ and SO42−, respectively, the durability tests were conducted on three types of mineral admixture concretes (concretes with single-added metakaolin (MK), single-added ultra-fine fly ash (UFA), and composite of metakaolin and ultra-fine fly ash (MF), and one reference concrete. In these tests, the 10% Na2SO4 solution and the 10% MgSO4 solution were used as the erosion medium, and the drying-wetting circle method was applied. It can be seen from the compressive tests and grey relational analysis that the MK admixture can improve the anti-Na2SO4-erosion capability of the concrete significantly, but weaken its anti-MgSO4-erosion capability; the UFA admixture can improve both the anti-Na2SO4-erosion and the anti-MgSO4-erosion capability of the concrete; and the composite admixture has superimposed effects and can enhance erosion resistance against these two erosion mediums. The phase composition and the changes of the macro morphology and the micro structure during the erosion process caused by mono sulfate ions and complex ions has been observed through X-ray diffraction (XRD), FTIR spectrum (FTIR), and scanning electron microscope (SEM), based on which it was determined that the erosion of single-added SO42− ions can produce erosive outputs of ettringite, gypsum, and mirabilite in the concrete, and cause corner scaling or deformation. Mg2+ and SO42− reacted in the concrete and produced brucite, M-S-H, ettringite, and gypsum, etc. The erosion of complex ions can cause scaling of the cement mortar and aggregate from the surface or the desquamation of corners.
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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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Xu H, Chen Z, Wu X, Zhao L, Wang N, Mao D, Ren H, Luo Y. Antibiotic contamination amplifies the impact of foreign antibiotic-resistant bacteria on soil bacterial community. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 758:143693. [PMID: 33280868 DOI: 10.1016/j.scitotenv.2020.143693] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 11/02/2020] [Accepted: 11/02/2020] [Indexed: 05/21/2023]
Abstract
Human activities are stimulating the presence of foreign antibiotic-resistance bacteria (ARB) in soils and antibiotic-contaminated soils are increasing continuously in the world. However, little is known about the impacts of foreign ARB on the indigenous bacterial community in antibiotic-contaminated soil. Herein, using a microcosm experiment we studied the soil bacterial community composition and function (presented with niche structure and niche breadth) in the response to a model ARB (multidrug-resistant Escherichia coli) amendment in the absence and presence of tetracycline contamination. Results demonstrated that the ARB amendment increased the diversity and niche breadth and altered the composition and niche structure of the soil bacterial community. Tetracycline contamination further enhanced these impacts probably via increasing the survival of foreign ARB in soil. Interestingly, the ARB-induced changes in the bacterial community composition and function were synchronized, which might be driven by the substantial changes in some core taxa (Proteobacteria, Bacteroidetes, Chloroflexi, and Patescibacteria). Furthermore, the impacts of the foreign ARB on soil bacterial community lasted longer than the survival of ARB in tetracycline-uncontaminated and low contaminated soils, demonstrating that the amendment of foreign ARB into soil likely challenges the stability of the soil bacterial community in a relatively long period. Overall, this study highlighted that antibiotic contamination could aggravate the impacts of the foreign ARB on soil bacterial community composition and function, resulting in the potential risks in reducing soil quality.
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Affiliation(s)
- Han Xu
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Zeyou Chen
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Xinyan Wu
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Lin Zhao
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Nan Wang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Daqing Mao
- Medical College, Nankai University, Tianjin 300071, China
| | - Hongqiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China
| | - Yi Luo
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China.
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Liu N, Xu L, Han L, Huang G, Ciric L. Microbiological safety and antibiotic resistance risks at a sustainable farm under large-scale open-air composting and composting toilet systems. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123391. [PMID: 32653795 DOI: 10.1016/j.jhazmat.2020.123391] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 06/10/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
This study evaluated the microbial safety and antibiotic resistance risks of a sustainable ecological farm under large-scale open-air composting (OC) and green composting toilet systems (CT). Samples of livestock manure, compost, soil, vegetables, and rainwater were analysed to determine the best treatment of wastes and risk assessment of land application. Results showed that pathogenic bacteria (PB) in livestock manure was significantly greater than that in the surrounding topsoil, while the distribution of bacteria resistant to amoxicillin (AMX), tetracycline (TC), and amoxicillin-tetracycline (AMX- TC) was the opposite through long-term resistance selection pressure. E. coli and Enterococcus were the dominant pathogens in feces and surrounding soil, respectively, and AMX-resistant bacteria dominated soil, compost, and vegetable samples. Overall, while OC may significantly increase antibiotic resistance and effectively remove fecal PB, CT offers faster consumption with greater antibiotic resistant bacteria (ARB) removal but more PB. Moreover, PB and ARB were concentrated in mature compost, soil in planting areas, vegetables, and rainwater. In farm soil and vegetables, AMX-resistant and AMX-TC-resistant bacterial communities displayed similar composition. These findings may explain the main pathways of PB transmission, migration and accumulation of ARB in farms, and the potential risks to human health through the food chain.
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Affiliation(s)
- Ning Liu
- Engineering Laboratory for AgroBiomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing 100083, China.
| | - Like Xu
- Healthy Infrastructure Research Group, Department of Civil, Environmental & Geomatic Engineering, University College London, Gower Street, WC1E 6BT London, UK
| | - Lujia Han
- Engineering Laboratory for AgroBiomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing 100083, China.
| | - Guangqun Huang
- Engineering Laboratory for AgroBiomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing 100083, China.
| | - Lena Ciric
- Healthy Infrastructure Research Group, Department of Civil, Environmental & Geomatic Engineering, University College London, Gower Street, WC1E 6BT London, UK.
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Li L, Wang Q, Gao Y, Liu L, Duan Y, Mao D, Luo Y. Colistin and amoxicillin combinatorial exposure alters the human intestinal microbiota and antibiotic resistome in the simulated human intestinal microbiota. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 750:141415. [PMID: 32846251 DOI: 10.1016/j.scitotenv.2020.141415] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 05/26/2023]
Abstract
Antibiotics treatment could cause the dysbiosis of human intestinal microbiota and antibiotic resistome. Fecal microbiota transplantation (FMT) has been an efficacious treatment to restore the dysbiosis of intestinal microbiota in a variety of intestinal diseases. However, to data, the effect of the combinatorial antibiotic treatment on microbiota, antibiotic resistome and the FMT for restoration affected by combinatorial antibiotic exposure in the human intestinal microbiota remain unclear. In this study, we systematically investigated the effect of the colistin and amoxicillin combinatorial exposure in the simulator of the human intestinal microbial ecosystem (SHIME) and found that this combinatorial exposure significantly altered (p < 0.05) the human intestinal microbiota and antibiotic resistome. The shift of bacterial community and antibiotic resistome could incompletely recovery to baseline by FMT treatment after combinatorial antibiotic exposure. Additionally, the variance of antibiotic resistome was dominantly driven by the bacterial community (41.18%-68.03%) after the combinatorial antibiotic exposure. Overall, this study first to investigate the influence of the colistin and amoxicillin combinatorial exposure on the intestinal microbiota and antibiotic resistome, and assess the FMT recovery in the simulated human intestinal microbiota, which may potentially provide a correct administration of antibiotics and application of FMT in the clinic.
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Affiliation(s)
- Linyun Li
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Qing Wang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China; College of Energy and Environmental Engineering, Hebei University of Engineering, Hebei Key Laboratory of Air Pollution Cause and Impact (preparatory), Handan 056038, China
| | - Yanyu Gao
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Lei Liu
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Yujing Duan
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Daqing Mao
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Yi Luo
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China.
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Zheng H, Wang R, Zhang Q, Zhao J, Li F, Luo X, Xing B. Pyroligneous acid mitigated dissemination of antibiotic resistance genes in soil. ENVIRONMENT INTERNATIONAL 2020; 145:106158. [PMID: 33038622 DOI: 10.1016/j.envint.2020.106158] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 09/20/2020] [Accepted: 09/21/2020] [Indexed: 06/11/2023]
Abstract
Strategies to mitigate the spread of antibiotic resistance genes (ARGs) in soils are urgently needed. Therefore, a pristine pyroligneous acid (PA) from pyrolyzing blended woody waste at 450 °C and its three fractions distilled at 98, 130, and 220 °C (F1, F2, and F3) were used to evaluate their feasibility of reducing ARGs in soil. Application of PA, F2, and F3 effectively decreased the relative ARG abundance by 22.4-75.4% and 39.7-66.7% in the rhizosphere and bulk soil relative to control, respectively, and the removal efficiency followed an order of F3 > PA > F2. Contrarily, F1 increased the abundance of ARGs. The decreased abundance of two mobile genetic elements and impaired conjugative transfer of RP4 plasmid in the presence of PA, F2 and F3 demonstrated that the weakened horizontal gene transfer (HGT) contributed to the reduced ARG level. Variation partitioning analysis and structural equation models confirmed that ARG reduction was primarily driven by the weakened HGT, followed by the decreased co-selection of heavy metals and shifted bacterial community (e.g., reduced potential host bacteria of ARGs). Our findings provide practical and technical support for developing PA-based technology in remediating ARG-contaminated soil to ensure food safety and protect human health.
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Affiliation(s)
- Hao Zheng
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100 China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Ruirui Wang
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100 China
| | - Qian Zhang
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100 China
| | - Jian Zhao
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100 China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Fengmin Li
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100 China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
| | - Xianxiang Luo
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100 China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States.
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Manasa MRK, Katukuri NR, Darveekaran Nair SS, Haojie Y, Yang Z, Guo RB. Role of biochar and organic substrates in enhancing the functional characteristics and microbial community in a saline soil. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 269:110737. [PMID: 32425164 DOI: 10.1016/j.jenvman.2020.110737] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 05/06/2020] [Accepted: 05/07/2020] [Indexed: 06/11/2023]
Abstract
In sustaining the soil quality, soil salinization has become a major challenge due to the increasing salinity rate of 10% annually. Despite, the serious concerns, the influence of soil amendments on microbial communities and its related attributes have limited findings. Therefore, the present study aims to investigate the potential of three various biochars, digestate (DI), and its compost (COM) in reclamation of saline soil under closed ecosystem. The decrease in the pH was displayed by lignite char, and electrical conductivity by lignite char plus COM addition among all the treatments. The subside in Na +, with a significant rise in K +, was exhibited in soils amended with DI plus DI biochar as a combined ameliorate over control. The negative priming effects on native soil organic carbon (nSOC) due to the decreased substrate bioavailability, in corn straw and DI biochars ameliorates were noted. The urease and alkaline phosphatase activity were pronounced higher in COM. However, the catalase and fluorescein diacetate activity were greater in lignite char plus DI and COM respectively. The co-addition of biochar and organic substrates shifted microbial community, is in correspondence with the relative abundance of the phylum. Overall, the abundance of Firmicutes and Actinobacteria was higher in soils under a combination of lignite char with DI and COM respectively. Likely, the abundance of Euryarchaeota was dominant in the co-application of corn straw biochar and DI. Redundancy analysis revealed the intactness between bacterial genera and their metabolisms with K +, and Mg 2+. PICRUSt disclosed the enhanced metabolic functions in soil with amalgam of DI and its biochar. The findings showed that the application of DI and its biochar mixture, as an amendment could be a better approach in the long-term reclamation of saline soil.
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Affiliation(s)
- M R K Manasa
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, PR China; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province, 266101, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Naveen Reddy Katukuri
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, PR China; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province, 266101, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Sree Sankar Darveekaran Nair
- Single-Cell Center, PR China; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province, 266101, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Yang Haojie
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, PR China; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province, 266101, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Zhiman Yang
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, PR China; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province, 266101, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China; Dalian National Laboratory for Clean Energy, Dalian, 116023, PR China.
| | - Rong Bo Guo
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, PR China; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province, 266101, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China; Dalian National Laboratory for Clean Energy, Dalian, 116023, PR China.
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Zhao G, Shi M, Guo M, Fan H. Degradation Mechanism of Concrete Subjected to External Sulfate Attack: Comparison of Different Curing Conditions. MATERIALS 2020; 13:ma13143179. [PMID: 32708655 PMCID: PMC7412106 DOI: 10.3390/ma13143179] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/14/2020] [Accepted: 07/14/2020] [Indexed: 11/18/2022]
Abstract
Sulfate induced degradation of concrete brings great damage to concrete structures in saline or offshore areas. The degradation mechanism of cast-in-situ concrete still remains unclear. This paper investigates the degradation process and corresponding mechanism of cast-in-situ concrete when immersed in sulfate-rich corrosive environments. Concrete samples with different curing conditions were prepared and immersed in sulfate solutions for 12 months to simulate the corrosion of precast and cast-in-situ concrete structures, respectively. Tests regarding the changes of physical, chemical, and mechanical properties of concrete samples were conducted and recorded continuously during the immersion. Micro-structural and mineral methods were performed to analyze the changes of concrete samples after immersion. Results indicate that the corrosion process of cast-in-situ concrete is much faster than the degradation of precast concrete. Chemical attack is the main cause of degradation for both precast and cast-in-situ concrete. Concrete in the environment with higher sulfate concentration suffers more severe degradation. The water/cement ratio has a significant influence on the durability of concrete. A lower water/cement ratio results in obviously better resistance against sulfate attack for both precast and cast-in-situ concrete.
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Affiliation(s)
- Gaowen Zhao
- School of Highway, Chang’an University, Xi’an 710064, China;
- Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
- Correspondence: (G.Z.); (M.S.)
| | - Mei Shi
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
- Correspondence: (G.Z.); (M.S.)
| | - Mengzhen Guo
- School of Highway, Chang’an University, Xi’an 710064, China;
| | - Henghui Fan
- College of Water Conservancy and Architectural Engineering, Northwest A&F University, Yangling 712100, China;
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Yan W, Bai R, Wang S, Tian X, Li Y, Wang S, Yang F, Xiao Y, Lu X, Zhao F. Antibiotic resistance genes are increased by combined exposure to sulfamethoxazole and naproxen but relieved by low-salinity. ENVIRONMENT INTERNATIONAL 2020; 139:105742. [PMID: 32315890 DOI: 10.1016/j.envint.2020.105742] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/28/2020] [Accepted: 04/13/2020] [Indexed: 06/11/2023]
Abstract
Combined pollution of antibiotic and non-antibiotic pharmaceutical residues is ubiquitous in realistic polluted environments, which is regarded as a complicated emerging pollution. Herein, high-throughput sequencing and high-throughput quantitative PCR were applied to profile the overall changes in microbial communities and antibiotic resistance genes (ARGs) of biofilms in response to a combination of naproxen and sulfamethoxazole pollution. After continuous operation for 120 days, naproxen or/and sulfamethoxazole were efficiently removed, and the salinity of 1.00% enhanced the removal rate of sulfamethoxazole. The high-throughput sequencing revealed that Eubacterium spp. with abundances of over 40.00% dominated in all samples, and combined pollution of naproxen and sulfamethoxazole more readily promoted the occurrence of multidrug-resistant microbes, including Pseudomonas and Methylophilus. The high-throughput quantitative PCR results showed that the combined pollution of naproxen and sulfamethoxazole increased the total abundance of ARGs to approximately 9 copies per cell. In contrast, increasing the salinity to 1.00% greatly reduced the overall abundance of ARGs to below 2 copies per bacterial cell. Mantel test and Procrustes analysis indicated that microbiomes from different treatments had tight links to their respective antibiotic resistomes. Furthermore, network analysis revealed that multidrug-resistant microbes were potential hosts for greatly enriched numbers of ARGs in the combined treatment. As increased salinity eliminated those multidrug-resistant but salt-sensitive microbes, the abundance of ARGs was significantly decreased. These results showed the high probability of the transmission of ARGs in biofilms exposed to combined pollution of naproxen and sulfamethoxazole, which could be relieved by increased salinity.
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Affiliation(s)
- Weifu Yan
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, Fujian 361021, PR China
| | - Rui Bai
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, Fujian 361021, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Siqi Wang
- College of Resources and Environment, Quanzhou Normal University, Quanzhou, Fujian 362000, PR China
| | - Xiaochun Tian
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, Fujian 361021, PR China
| | - Yan Li
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, Fujian 361021, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Shuhua Wang
- College of Resources and Environment, Quanzhou Normal University, Quanzhou, Fujian 362000, PR China
| | - Fan Yang
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, Fujian 361021, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yong Xiao
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, Fujian 361021, PR China.
| | - Xiaoquan Lu
- College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, PR China; Tianjin University, Tianjin 300072, PR China
| | - Feng Zhao
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, Fujian 361021, PR China.
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Lal Gupta C, Kumar Tiwari R, Cytryn E. Platforms for elucidating antibiotic resistance in single genomes and complex metagenomes. ENVIRONMENT INTERNATIONAL 2020; 138:105667. [PMID: 32234679 DOI: 10.1016/j.envint.2020.105667] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 03/15/2020] [Accepted: 03/16/2020] [Indexed: 05/21/2023]
Abstract
Antibiotic or antimicrobial resistance (AR) facilitated by the vertical and/or horizontal transfer of antibiotic resistance genes (ARGs), is a serious global health challenge. While traditionally associated with pathogens in clinical environments, it is becoming increasingly clear that non-clinical environments may also be reservoirs of ARGs. The recent improvements in rapid and affordable next generation sequencing technologies along with sophisticated bioinformatics platforms has the potential to revolutionize diagnostic microbiology and microbial surveillance. Through the study and characterization of ARGs in bacterial genomes and complex metagenomes, we are now able to reveal the genetic scope of AR in single bacteria and complex communities, and obtain important insights into AR dynamics at species, population and community levels, providing novel epidemiological and ecological perspectives. A suite of bioinformatics pipelines and ARG databases are currently available for genomic and metagenomic data analyses. However, different platforms may significantly vary and therefore, it is crucial to choose the tools that are most suitable for the specific analysis being conducted. This review provides a detailed account of available bioinformatics platforms for identification and characterization of ARGs and associated genetic elements within single bacterial isolates and complex environmental samples. It focuses primarily on currently available ARG databases, employing a comprehensive benchmarking pipeline to identify ARGs in four bacterial genomes (Aeromonas salmonicida, Bacillus cereus, Burkholderia sp. and Escherichia coli) and three shotgun metagenomes (human gut, poultry litter and soil) providing insight into which databases should be used for different analytical scenarios.
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Affiliation(s)
- Chhedi Lal Gupta
- Institute of Soil, Water and Environmental Sciences, Volcani Research Center, Agriculture Research Organization, Rishon Lezion 7528809, Israel
| | - Rohit Kumar Tiwari
- Department of Biosciences, Integral University, Lucknow 226026, UP, India
| | - Eddie Cytryn
- Institute of Soil, Water and Environmental Sciences, Volcani Research Center, Agriculture Research Organization, Rishon Lezion 7528809, Israel.
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