1
|
Zhang S, Shen Y, Wang S, Lin Z, Su R, Jin F, Zhang Y. Responses of the gut microbiota to environmental heavy metal pollution in tree sparrow (Passer montanus) nestlings. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 264:115480. [PMID: 37716068 DOI: 10.1016/j.ecoenv.2023.115480] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 08/22/2023] [Accepted: 09/12/2023] [Indexed: 09/18/2023]
Abstract
Gut microbiota plays a critical role in regulating the health and adaptation of wildlife. However, our understanding of how exposure to environmental heavy metals influences the gut microbiota of wild birds, particularly during the vulnerable and sensitive nestling stage, remains limited. In order to investigate the relationship between heavy metals and the gut microbiota, we analyzed the characteristics of gut microbiota and heavy metals levels in tree sparrow nestlings at different ages (6, 9 and 12-day-old). The study was conducted in two distinct areas: Baiyin (BY), which is heavily contaminated with heavy metals, and Liujiaxia (LJX), a relatively unpolluted area. Our result reveled a decrease in gut microbiota diversity and increased inter-individual variation among nestlings in BY. However, we also observed an increase in the abundance of bacterial groups and an up-regulation of bacterial metabolic functions associated with resistance to heavy metals toxicity in BY. Furthermore, we identified a metal-associated shift in the relative abundance of microbial taxa in 12-day-old tree sparrow nestlings in BY, particularly involving Aeromonadaceae, Ruminococcaceae and Pseudomonadaceae. Moreover, a significant positive correlation was found between the body condition of tree sparrow nestlings and the abundance of Bifidobacteriaceae in BY. Collectively, our findings indicate that the gut microbiota of tree sparrow nestlings is susceptible to heavy metals during early development. However, the results also highlight the presence of adaptive responses that enable them to effectively cope with environmental heavy metal pollution.
Collapse
Affiliation(s)
- Sheng Zhang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Yue Shen
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Shengnan Wang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Zhaocun Lin
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Rui Su
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Fei Jin
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Yingmei Zhang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
| |
Collapse
|
2
|
Touahir N, Alouache S, Dehane D. Assessment and characterization of heavy metals resistance bacteria isolated in Southwestern Mediterranean coastal waters (Bou-Ismail Bay): Impacts of anthropogenic activities. MARINE POLLUTION BULLETIN 2023; 192:115085. [PMID: 37301007 DOI: 10.1016/j.marpolbul.2023.115085] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 05/18/2023] [Accepted: 05/19/2023] [Indexed: 06/12/2023]
Abstract
Bacteria present in the marine environment can cause ecological risks and seriously impact human health through direct contact or the food chain. This paper examines bacterial resistance to heavy metals and anthropogenic inputs' influence in four Bou-Ismail Bay regions (Algerian coast). The study was conducted from May to October 2018. High levels of resistance of total flora and total coliform were observed respectively for zinc (29.5 %, 30.5 %), copper (26.2 %, 20.7 %), mercury (17.4 %, 17.2 %), lead (16.9 %, 14.2 %), and cadmium (8.9 %, 0 %). A total 118 metal resistant bacteria were identified. All isolates were tested against 5 heavy metals and 7 antibiotics. The isolates showed tolerance to different concentrations of heavy metals ranging from 12.5 to 6400 μg/ml and exposed a co-resistance to the other heavy metals. The majority of strains were multi-resistant to heavy metals and antibiotics. Therefore, the bacteria isolated from Bou-Ismail Bay are highly resistant to heavy metals and antibiotics.
Collapse
Affiliation(s)
- Nawal Touahir
- Laboratory Conservation and Valorization of Marine Resources (CVRM), National Higher School of Marine Sciences and Coastal Management (ENSSMAL), Algiers, Algeria.
| | - Souhila Alouache
- Laboratory Conservation and Valorization of Marine Resources (CVRM), National Higher School of Marine Sciences and Coastal Management (ENSSMAL), Algiers, Algeria; Laboratory of Cellular and Molecular Biology, Faculty of Biological Sciences, University of Sciences and Technology Houari-Boumédiène, Algiers, Algeria
| | - Djema Dehane
- Laboratory Conservation and Valorization of Marine Resources (CVRM), National Higher School of Marine Sciences and Coastal Management (ENSSMAL), Algiers, Algeria
| |
Collapse
|
3
|
Robas Mora M, Fernández Pastrana VM, González Reguero D, Gutiérrez Oliva LL, Probanza Lobo A, Jiménez Gómez PA. Oxidative stress protection and growth promotion activity of Pseudomonas mercuritolerans sp. nov., in forage plants under mercury abiotic stress conditions. Front Microbiol 2022; 13:1032901. [PMID: 36560952 PMCID: PMC9763275 DOI: 10.3389/fmicb.2022.1032901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 11/14/2022] [Indexed: 12/12/2022] Open
Abstract
SAICEUPSMT strain was isolated from soils in the mining district of Almadén (Ciudad Real, Spain), subjected to a high concentration of mercury. Using the plant model of lupinus, the strain was inoculated into the rhizosphere of the plant in a soil characterized by a high concentration of mercury (1,710 ppm) from an abandoned dump in the mining district of Almadén (Ciudad Real, Spain). As a control, a soil with a minimum natural concentration of mercury, from a surrounding area, was used. Under greenhouse conditions, the effect that the inoculum of the SAICEUPSMT strain had on the antioxidant capacity of the plant was studied, through the quantification of the enzymatic activity catalase (CAT), ascorbate peroxidase (APX), superoxide dismutase (SOD), and glutathione reductase (GR). Likewise, the capacity of the plant to bioaccumulate mercury in the presence of the inoculum was studied, as well as the effect on the biometric parameters total weight (g), shoot weight (g), root weight (g), shoot length (cm), root length (cm), total number of leaves (N), and total number of secondary roots (No). Finally, in view of the results, the SAICEUPSMT strain was identified from the phenotypic and genotypic point of view (housekeeping genes and complete genome sequencing). The inoculum with the SAICEUPSMT strain in the presence of mercury produced a significant reduction in the enzymatic response to oxidative stress (CAT, APX, and SOD). It can be considered that the strain exerts a phytoprotective effect on the plant. This led to a significant increase in the biometric parameters total plant weight, root weight and the number of leaves under mercury stress, compared to the control without abiotic stress. When analyzing the mercury content of the plant with and without bacterial inoculum, it was found that the incorporation of the SAICEUPSMT strain significantly reduced the uptake of mercury by the plant, while favoring its development in terms of biomass. Given the positive impact of the SAICEUPSMT strain on the integral development of the plant, it was identified, proving to be a Gram negative bacillus, in vitro producer of siderophores, auxins and molecules that inhibit stress precursors. The most represented fatty acids were C16:0 (33.29%), characteristic aggregate 3 (22.80%) comprising C16:1 ω7c and C16: 1ω6c, characteristic aggregate 8 (13.66%) comprising C18:1 ω7c, and C18: 1 cycle ω6c and C 17:0 (11.42%). From the genotypic point of view, the initial identification of the strain based on the 16S rRNA gene sequence classified it as Pseudomonas iranensis. However, genome-wide analysis showed that average nucleotide identity (ANI, 95.47%), DNA-DNA in silico hybridization (dDDH, 61.9%), average amino acid identity (AAI, 97.13%), TETRA (0.99%) and intergenic distance (0.04) values were below the established thresholds for differentiation. The results of the genomic analysis together with the differences in the phenotypic characteristics and the phylogenetic and chemotaxonomic analysis support the proposal of the SAICEUPSMT strain as the type strain of a new species for which the name Pseudomonas mercuritolerans sp. is proposed. No virulence genes or transmissible resistance mechanisms have been identified, which reveals its safety for agronomic uses, under mercury stress conditions.
Collapse
Affiliation(s)
- Marina Robas Mora
- Department of Health and Pharmaceutical Sciences, School of Pharmacy, Universidad San Pablo-CEU, CEU Universities, Madrid, Spain
| | | | | | | | | | - Pedro A. Jiménez Gómez
- Department of Health and Pharmaceutical Sciences, School of Pharmacy, Universidad San Pablo-CEU, CEU Universities, Madrid, Spain
| |
Collapse
|
4
|
Silverio MP, Kraychete GB, Rosado AS, Bonelli RR. Pseudomonas fluorescens Complex and Its Intrinsic, Adaptive, and Acquired Antimicrobial Resistance Mechanisms in Pristine and Human-Impacted Sites. Antibiotics (Basel) 2022; 11:antibiotics11080985. [PMID: 35892375 PMCID: PMC9331890 DOI: 10.3390/antibiotics11080985] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/18/2022] [Accepted: 07/19/2022] [Indexed: 12/16/2022] Open
Abstract
Pseudomonas spp. are ubiquitous microorganisms that exhibit intrinsic and acquired resistance to many antimicrobial agents. Pseudomonas aeruginosa is the most studied species of this genus due to its clinical importance. In contrast, the Pseudomonas fluorescens complex consists of environmental and, in some cases, pathogenic opportunistic microorganisms. The records of antimicrobial-resistant P. fluorescens are quite scattered, which hinders the recognition of patterns. This review compiles published data on antimicrobial resistance in species belonging to the P. fluorescens complex, which were identified through phylogenomic analyses. Additionally, we explored the occurrence of clinically relevant antimicrobial resistance genes in the genomes of the respective species available in the NCBI database. Isolates were organized into two categories: strains isolated from pristine sites and strains isolated from human-impacted or metal-polluted sites. Our review revealed that many reported resistant phenotypes in this complex might be related to intrinsic features, whereas some of them might be ascribed to adaptive mechanisms such as colistin resistance. Moreover, a few studies reported antimicrobial resistance genes (ARGs), mainly β-lactamases. In-silico analysis corroborated the low occurrence of transferable resistance mechanisms in this Pseudomonas complex. Both phenotypic and genotypic assays are necessary to gain insights into the evolutionary aspects of antimicrobial resistance in the P. fluorescens complex and the possible role of these ubiquitous species as reservoirs of clinically important and transmissible ARGs.
Collapse
Affiliation(s)
- Myllena Pereira Silverio
- Laboratório de Ecologia Molecular Microbiana, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-902, Brazil
- Laboratório de Investigação em Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-902, Brazil
| | - Gabriela Bergiante Kraychete
- Laboratório de Investigação em Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-902, Brazil
| | - Alexandre Soares Rosado
- Laboratório de Ecologia Molecular Microbiana, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-902, Brazil
- Biological and Environmental Sciences and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Raquel Regina Bonelli
- Laboratório de Investigação em Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-902, Brazil
| |
Collapse
|
5
|
Kookhaee F, Bafroee AST, Jabalameli L. Isolation and characterization of chromium (VI) tolerant bacteria from tannery effluents. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2022; 20:443-458. [PMID: 35669830 PMCID: PMC9163263 DOI: 10.1007/s40201-022-00791-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 01/08/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND The tannery industry is a potent environment polluting agent worldwide. Chromium (VI) is a major heavy metal in tannery effluents and their accumulation in soil and water is a serious environmental problem. This study investigates the capacity of indigenous bacteria isolated from tannery effluents for tolerance to chromium (VI). METHODS The chromium tolerance of isolates assessed through both agar dilution and broth microdilution methods. Isolates were identified by morphological and biochemical analysis. The tolerance of isolates to cadmium, nickel, lead, and vanadium and also their multidrug-resistant (MDR) profile were determined. Then the top isolate was characterized via 16S rRNA sequencing and its growth temperature and pH were optimized. Finally, the kinetic of chromium biosorption and chromium removal efficiency was determined using a Nutrient broth medium and wastewater containing 20 mg/L chromium, respectively. RESULTS Of 32 screened chromium tolerant isolates, 14 isolates with higher chromium tolerance were selected for further study. 78.57% of isolates represented simultaneous MDR and Multi Heavy Metal tolerance (MHMT) phenotypes and MDR indices of 0.2-1 indicating their source from niches with high antibiotic contamination. However, there was no significant correlation between MDR and MHMT phenotypes among isolates. The top isolate was identified as Lactococcus lactis and showed optimal growth at pH 6 and 25 °C. The maximum chromium biosorption occurred at the end of the exponential phase upon optimized conditions and the approximate chromium removal efficiency of 52.5% was obtained. CONCLUSION The isolated bacteria specifically L. lactis after more evaluations, may show the potential for bioremediation of chromium from tannery effluents.
Collapse
Affiliation(s)
- Fahimeh Kookhaee
- Department of Microbiology, Karaj Branch, Islamic Azad University, Karaj, Iran
| | | | - Leila Jabalameli
- Department of Microbiology, Karaj Branch, Islamic Azad University, Karaj, Iran
| |
Collapse
|
6
|
Li XD, Xin L, Rong WT, Liu XY, Deng WA, Qin YC, Li XL. Effect of heavy metals pollution on the composition and diversity of the intestinal microbial community of a pygmy grasshopper (Eucriotettix oculatus). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 223:112582. [PMID: 34365209 DOI: 10.1016/j.ecoenv.2021.112582] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 07/26/2021] [Accepted: 07/29/2021] [Indexed: 06/13/2023]
Abstract
Heavy metal pollution in the environment is mostly manifested as a multi-elemental compound pollution. The effect of the long-term exposure to heavy metal pollution on the gut microbes of insects has remained unknown. For the current work, the population of Eucriotettix oculatus living in mining areas around the Diaojiang River with a history of hundreds of years of pollution, was selected along with the similar species living in non-mining areas to conduct a comparative study of their gut microbes. The microbial communities were analyzed using 16S rRNA amplicon sequencing. The results showed Proteobacteria to be dominant among gut microbes of E. oculatus, but the abundance of Proteobacteria was significantly increased when the insects were exposed to the environment with heavy metal pollution. The symbiotic bacteria belonging to genus Wolbachia were found to be dominant among the insect population from the non-mining area group, while the pathogenic bacteria belonging to Aeromonas were dominant among the insect population of the mining area group. The diversity analysis showed that the gut microbial community diversity of E. oculatus was reduced in the heavy metal pollution habitat. The analysis of the differences in the gut microbial population and metabolic pathways of the two groups showed that the heavy metal pollution caused the increase in pathogenic bacteria among the gut microbes of E. oculatus, which might have a negative impact on the health of the host. At the same time, probiotics and the beneficial metabolism pathways were also found to increase and enhance, helping the host to resist the damage caused by heavy metal stress. This might be one of the strategies used by E. oculatus to adapt to heavy metal pollution.
Collapse
Affiliation(s)
- Xiao-Dong Li
- School of Chemistry and Bioengineering, Hechi University, Yizhou 546300, China.
| | - Lei Xin
- School of Chemistry and Bioengineering, Hechi University, Yizhou 546300, China
| | - Wan-Tao Rong
- School of Chemistry and Bioengineering, Hechi University, Yizhou 546300, China
| | - Xin-Yi Liu
- School of Chemistry and Bioengineering, Hechi University, Yizhou 546300, China
| | - Wei-An Deng
- School of Chemistry and Bioengineering, Hechi University, Yizhou 546300, China
| | - Ying-Can Qin
- School of Chemistry and Bioengineering, Hechi University, Yizhou 546300, China
| | - Xiu-Ling Li
- School of Chemistry and Bioengineering, Hechi University, Yizhou 546300, China.
| |
Collapse
|
7
|
ElNaker NA, Sallam AM, El-Sayed ESM, El Ghandoor H, Talaat MS, Yousef AF, Hasan SW. A conceptual framework modeling of functional microbial communities in wastewater treatment electro-bioreactors. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 82:3047-3061. [PMID: 33341792 DOI: 10.2166/wst.2020.553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Understanding the microbial ecology of a system allows linking members of the community and their metabolic functions to the performance of the wastewater bioreactor. This study provided a comprehensive conceptual framework for microbial communities in wastewater treatment electro-bioreactors (EBRs). The model was based on data acquired from monitoring the effect of altering different bioreactor operational parameters, such as current density and hydraulic retention time, on the microbial communities of an EBR and its nutrient removal efficiency. The model was also based on the 16S rRNA gene high-throughput sequencing data analysis and bioreactor efficiency data. The collective data clearly demonstrated that applying various electric currents affected the microbial community composition and stability and the reactor efficiency in terms of chemical oxygen demand, N and P removals. Moreover, a schematic that recommends operating conditions that are tailored to the type of wastewater that needs to be treated based on the functional microbial communities enriched at specific operating conditions was suggested. In this study, a conceptual model as a simplified representation of the behavior of microbial communities in EBRs was developed. The proposed conceptual model can be used to predict how biological treatment of wastewater in EBRs can be improved by varying several operating conditions.
Collapse
Affiliation(s)
- Nancy A ElNaker
- Center for Membranes and Advanced Water Technology (CMAT), Department of Chemical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates E-mail: ; Department of Chemistry, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates; Physics Department, Biophysics Group, Faculty of Science, Ain Shams University, P.O. Box 11566, Cairo, Egypt
| | - Abdelsattar M Sallam
- Physics Department, Biophysics Group, Faculty of Science, Ain Shams University, P.O. Box 11566, Cairo, Egypt
| | - El-Sayed M El-Sayed
- Physics Department, Biophysics Group, Faculty of Science, Ain Shams University, P.O. Box 11566, Cairo, Egypt
| | - H El Ghandoor
- Physics Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - M S Talaat
- Physics Department, Biophysics Group, Faculty of Science, Ain Shams University, P.O. Box 11566, Cairo, Egypt
| | - Ahmed F Yousef
- Department of Chemistry, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Shadi W Hasan
- Center for Membranes and Advanced Water Technology (CMAT), Department of Chemical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates E-mail:
| |
Collapse
|
8
|
Alaali Z, Bin Thani AS. Patterns of antimicrobial resistance observed in the Middle East: Environmental and health care retrospectives. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 740:140089. [PMID: 32559543 DOI: 10.1016/j.scitotenv.2020.140089] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/07/2020] [Accepted: 06/07/2020] [Indexed: 06/11/2023]
Abstract
Antimicrobial resistance is one of the biggest worldwide challenging problems that associates with high morbidity and mortality rates. The resistance of bacteria to various antibiotic classes results in difficulties in the treatment of infectious diseases caused by those bacteria. This paper highlights and provides a critical overview of observational and experimental studies investigating the presence of antibiotic resistant bacteria in different environments in Middle East countries and the mechanisms by which bacteria acquire and spread resistance. The data of this research considered the published papers within the last ten years (2010-2020) and was carried out using PubMed. A total of 66 articles were selected in this review. This review covered studies done on antibiotic resistant bacteria found in a wide range of environments including foods, animals, groundwater, aquatic environments as well as industrial and hospital wastewater. They acquire and achieve their resistance through several mechanisms such as antibiotic resistant genes, efflux pumps and enzymatic reactions. However, the dissemination and spread of antibiotic resistant bacteria is affected by several factors like anthropogenic, domestic, inappropriate use of antibiotics and the expulsion of wastewater containing antibiotic residues to the environments. Therefore, it is important to increase the awareness regarding these activities and their effect on the environment and eventually on health.
Collapse
Affiliation(s)
- Zahraa Alaali
- Department of Biology, College of Science, University of Bahrain, Sakhir Campus, Sakhir 976, Bahrain.
| | - Ali Salman Bin Thani
- Department of Biology, College of Science, University of Bahrain, Sakhir Campus, Sakhir 976, Bahrain
| |
Collapse
|
9
|
Altuğ G, Çardak M, Türetken PSÇ, Kalkan S, Gürün S. Antibiotic and Heavy Metal Resistant Bacteria Isolated from Aegean Sea Water and Sediment in Güllük Bay, Turkey : Quantifying the resistance of identified bacteria species with potential for environmental remediation applications. JOHNSON MATTHEY TECHNOLOGY REVIEW 2020. [DOI: 10.1595/205651320x15953337767424] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Heavy metal and antibiotic-resistant bacteria have potential for environmental bioremediation applications. Resistant bacteria were investigated in sediment and seawater samples taken from the Aegean Sea, Turkey, between 2011 and 2013. Bioindicator bacteria in seawater samples were
tested using the membrane filtration technique. The spread plate technique and VITEK® 2 Compact 30 micro identification system were used for heterotrophic aerobic bacteria in the samples. The minimum inhibition concentration method was used for heavy metal-resistant bacteria.
Antibiotic-resistant bacteria were tested using the disk diffusion method. All bacteria isolated from sediment samples showed 100% resistance to rifampicin, sulfonamide, tetracycline and ampicillin. 98% of isolates were resistant against nitrofurantoin and oxytetracycline. Higher antibiotic
and heavy metal resistance was recorded in bacteria isolated from sediment than seawater samples. The highest levels of bacterial metal resistance were recorded against copper (58.3%), zinc (33.8%), lead (32.1%), chromium (31%) and iron (25.2%). The results show that antibiotic and heavy metal
resistance in bacteria from sediment and seawater can be observed as responses to environmental influences including pollution in marine areas.
Collapse
Affiliation(s)
- Gülşen Altuğ
- Department of Marine Biology, Faculty of Aquatic Sciences, Istanbul University Balabanağa Mahallesi Ordu Caddesi No 8, Laleli, Fatih Istanbul, 34134, Turkey
| | - Mine Çardak
- Department of Fisheries Technology, Faculty of Çanakkale Applied Sciences, Çanakkale Onsekiz Mart University, Terzioğlu Campus Çanakkale, 17020 Turkey
| | - Pelin Saliha Çiftçi Türetken
- Department of Marine Biology, Faculty of Aquatic Sciences, Istanbul University Balabanağa Mahallesi Ordu Caddesi No 8, Laleli, Fatih, Istanbul, 34134 Turkey
| | - Samet Kalkan
- Department of Marine Biology, Faculty of Fisheries and Aquatic Sciences, Recep Tayyip Erdoğan University, Zihni Derin Campus, Rize 53100 Turkey
| | - Sevan Gürün
- Department of Marine Biology, Faculty of Aquatic Sciences, Istanbul University, Balabanağa Mahallesi Ordu Caddesi No 8, Laleli, Fatih, Istanbul 34134 Turkey
| |
Collapse
|
10
|
Wan W, Xing Y, Qin X, Li X, Liu S, Luo X, Huang Q, Chen W. A manganese-oxidizing bacterial consortium and its biogenic Mn oxides for dye decolorization and heavy metal adsorption. CHEMOSPHERE 2020; 253:126627. [PMID: 32278907 DOI: 10.1016/j.chemosphere.2020.126627] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 03/09/2020] [Accepted: 03/25/2020] [Indexed: 06/11/2023]
Abstract
Manganese (Mn) contamination is a common environmental problem in the world and manganese oxidizing bacteria (MOB) play important roles in bioremediation of heavy metal and organic pollution. In this study, a novel MOB consortium AS containing core microbes of Sphingobacterium and Bacillus was acclimated from Mn-contaminated rivulet sediments. The MOB consortium AS presented good Mn(II) removal performance under 500-10,000 mg/L Mn(II), with Mn(II) removal capacities ranging from 481 to 3478 mg/L. In coexistence systems of Mn(II) and Fe(II), Ni(II), Cu(II), and Zn(II), the MOB consortium AS removed 98%, 91%, 99%, and 76% of Mn(II), respectively. Additionally, the MOB consortium AS could utilize multiple carbon sources (e.g., Chitosan, β-Cyclodextrin, and Phenanthrene) to remove Mn(II), with Mn(II) removal efficiencies ranging from 11% to 97%. Meanwhile, XRD, XPS, FTIR, SEM, and EDS analyses reflected that biogenic Mn oxides (bio-MnOx-C) contained C, O, Mn (Mn(II) and Mn(IV)) and embodied in rhodochrosite and birnessite. The bio-MnOx-C exhibited second-order kinetic reaction for removal of dye, with corresponding decolorization capacities of 22.0 mg/g for methylene blue and 23.8 mg/g for crystal violet. In addition, bio-MnOx-C showed adsorption capacities of 159.0 mg/g for Cu(II), 130.7 mg/g for Zn(II), and 123.3 mg/g for Pb(II). Overall, this study illustrates consortium AS and bio-MnOx-C have great potentials in remediation of pollution caused by heavy metals and organic pollutants.
Collapse
Affiliation(s)
- Wenjie Wan
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Yonghui Xing
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Xiuxiu Qin
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Xiang Li
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Song Liu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Xuesong Luo
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China; Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Qiaoyun Huang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China; Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Wenli Chen
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, PR China.
| |
Collapse
|
11
|
Zampieri BDB, da Costa Andrade V, Chinellato RM, Garcia CAB, de Oliveira MA, Brucha G, de Oliveira AJFC. Heavy metal concentrations in Brazilian port areas and their relationships with microorganisms: can pollution in these areas change the microbial community? ENVIRONMENTAL MONITORING AND ASSESSMENT 2020; 192:512. [PMID: 32661589 DOI: 10.1007/s10661-020-08413-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 06/07/2020] [Indexed: 06/11/2023]
Abstract
The objectives of this study were to analyze the difference in ways in which metals polluting Brazilian port areas influence bacterial communities and the selection of resistant strains. The hypothesis tested was that port areas would have microbial communities significantly different from a pristine area, mainly due to a greater load of metals found in these areas. Sediment samples were collected in two port areas (Santos and São Sebastião) and one pristine area (Ubatuba). Total DNA was extracted and MiSeq sequencing was performed. A hundred strains were isolated from the same samples and were tested for metal resistance. The community composition was similar in the two port regions, but differed from the pristine area. Microbial diversity was significantly lower in the port areas. The phyla Proteobacteria, Cyanobacteria, and Thermodesulfobacteria exhibited positive correlations with copper and zinc concentrations. Chloroflex, Nitrospirae, Planctomycetes, and Chlorobi exhibited negative correlations with copper, chromium, and zinc. Cr and Zn had higher concentrations at port areas and were responsible to select more metal-resistant strains. Some genera were found to be able to easily develop metal resistance. The most isolated genera were Bacillus, Vibrio, and Pseudomonas. This type of study can illustrate, even in very complex natural environments, the influence of pollution on the community as a whole and the consequences of these changes.
Collapse
Affiliation(s)
- Bruna Del Busso Zampieri
- Department of Biochemistry and Microbiology, School of Biology, São Paulo State University - Rio Claro Campus (UNESP Rio Claro), Av. 24 A, 1515 - Jardim Vila Bela, Rio Claro, São Paulo, 13506-900, Brazil.
| | - Vanessa da Costa Andrade
- Department of Biochemistry and Microbiology, School of Biology, São Paulo State University - Rio Claro Campus (UNESP Rio Claro), Av. 24 A, 1515 - Jardim Vila Bela, Rio Claro, São Paulo, 13506-900, Brazil
| | - Roberta Merguizo Chinellato
- School of Biosciences, São Paulo State University - São Vicente Campus (UNESP São Vicente), Praça Infante Dom Henrique, s/n, Parque Bitaru, São Paulo, 11330-900, Brazil
| | - Carlos Alexandre Borges Garcia
- Department of Chemistry, Center for Exact Sciences and Technology, Federal University of Sergipe - São Cristóvão Campus (UFS São Cristóvão), Cidade Universitária Prof. José Aloísio de Campos Rosa Elze, São Cristóvão, Sergipe, 49100000, Brazil
| | - Marcos Antônio de Oliveira
- School of Biosciences, São Paulo State University - São Vicente Campus (UNESP São Vicente), Praça Infante Dom Henrique, s/n, Parque Bitaru, São Paulo, 11330-900, Brazil
| | - Gunther Brucha
- School of Technological Sciences, Federal University of Alfenas (UNIFAL-MG), Rodovia Aurélio Vilela, n 11.999 Cidade Universitária, Poços de Caldas, Minas Gerais, 37715400, Brazil
| | - Ana Julia Fernandes Cardoso de Oliveira
- School of Biosciences, São Paulo State University - São Vicente Campus (UNESP São Vicente), Praça Infante Dom Henrique, s/n, Parque Bitaru, São Paulo, 11330-900, Brazil
| |
Collapse
|
12
|
Nowrotek M, Jałowiecki Ł, Płaza G. Fluoroquinolone Resistance and Virulence Properties Among Wastewater Aeromonas caviae Isolates. Microb Drug Resist 2020; 27:179-189. [PMID: 32552456 DOI: 10.1089/mdr.2019.0287] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The study provides data on antibiotic resistance as well as the virulence characteristics of Aeromonas caviae isolated from raw and treated wastewater. The isolates were identified as A. caviae by 16S rRNA gene sequencing. In the analyzed strains, high frequency for the following genes was observed: aac(6')-Ib-cr, qnrB, and qnrD. The presence of qnrA and ogxB genes was not found in any strain. The higher frequency of the investigated genes was observed in strains from raw wastewater (RW). The strains of A. caviae showed multiple antibiotic resistance evaluated by the disk diffusion method. Multiple antibiotic resistance indices ranged from 0.36 to 0.69. Susceptibility to six heavy metals (Cd+2, Zn+2, Cu+2, Co+2, Mn+2, and Ni+2) was recorded for all the isolates. The order of metal resistance of A. caviae was Co > Cu > Zn > Cd > Ni > Mn. All the strains of A. caviae showed β-hemolytic activity. Enzymes of amylase, cellulase, and lipase were produced by all isolates. Only the strains from RW had the ability to form biofilms and showed motility. The obtained results indicate that wastewater is a potential source and/or reservoir of virulent and multidrug-resistant A. caviae as "high-risk isolates."
Collapse
Affiliation(s)
- Monika Nowrotek
- Environmental Microbiology Unit, Institute for Ecology of Industrial Areas, Katowice, Poland
| | - Łukasz Jałowiecki
- Environmental Microbiology Unit, Institute for Ecology of Industrial Areas, Katowice, Poland
| | - Grażyna Płaza
- Environmental Microbiology Unit, Institute for Ecology of Industrial Areas, Katowice, Poland
| |
Collapse
|
13
|
Candan O, Candan ED. Bacterial diversity of the green turtle (Chelonia mydas) nest environment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 720:137717. [PMID: 32325608 DOI: 10.1016/j.scitotenv.2020.137717] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 01/12/2020] [Accepted: 03/02/2020] [Indexed: 06/11/2023]
Abstract
The green turtle is an endangered species that is highly sensitive to environmental pollution that can adversely affect the healthy development of eggs. Moreover, the presence of some bacteria in nests can be regarded as an indicator of the pollution level in nesting areas. In our study, nest sand and egg contents were collected from Sugözü Beaches (Turkey), in the Mediterranean. Phenotypic and genotypic identification of bacteria were carried out by using conventional phenotypic methods, 16S rRNA gene sequencing respectively. The extended-spectrum beta-lactamase presence and carbapenem resistance of bacteria isolated from egg contents were determined. This is the first report of carbapenem resistance in the eggs. All strains were evaluated in three different categories including growth promoters in agriculture and aquaculture, pathogens that are found in human and animal, and biomonitoring aquatic pollution. According to our analysis, 67 bacterial species were identified from samples. This study is the first record of Alcaligenes, Zobellella, Lysinibacillus, Sphingobacterium, Achromobacter, Acinetobacter, Alcanivorax, Ochrobactrum, Microbacterium, Rhodococcus, and Stenotrophomonas isolated from sea turtles. Pathogens detected in the bacterial flora can threaten both sea turtles and field workers. These data can contribute to the development of new conservation strategies on the treatment of sea turtles, nest protection, and pollution detection on nesting beaches.
Collapse
Affiliation(s)
- Onur Candan
- Ordu University, Faculty of Arts and Sciences, Department of Molecular Biology and Genetics, 52200 Ordu, Turkey.
| | - Esra Deniz Candan
- Giresun University, Vocational School of Health Services, Department of Medical Services and Techniques, 28100 Giresun, Turkey
| |
Collapse
|
14
|
Zdanowicz M, Mudryk ZJ, Perliński P. Abundance and antibiotic resistance of Aeromonas isolated from the water of three carp ponds. Vet Res Commun 2020; 44:9-18. [PMID: 31965460 PMCID: PMC7040064 DOI: 10.1007/s11259-020-09768-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 01/09/2020] [Indexed: 12/19/2022]
Abstract
Abundance and antibiotic resistance of bacteria of the genus Aeromonas isolated from the water of three carp ponds were studied. The number of those bacteria differed between the studied ponds, sites and season. The results of the present study showed that planktonic Aeromonas inhabiting those ponds strongly differed in the resistance level to tested antibiotics. These microorganisms were the most resistant to amoxicillin, ampicillin, clindamycin and penicillin. However, all isolates Aeromonas were susceptible to gentamycin and streptomycin. Majority of bacterial strains were characterized by resistance to 4-6 of the 12 antibiotics tested. Bacterial resistance to antibiotics depended on their chemical structure. Aeromonas strains isolated from the studied ponds were the most resistant to β-lactam and lincosamides antibiotics, while the most susceptible to aminoglycosides, chloramphenicols and fluoroquinolones.
Collapse
Affiliation(s)
- Marta Zdanowicz
- Department of Experimental Biology, Institute of Biology and Earth Science, Pomeranian University in Słupsk, Arciszewskiego 22b, 76-200, Słupsk, Poland
| | - Zbigniew Jan Mudryk
- Department of Experimental Biology, Institute of Biology and Earth Science, Pomeranian University in Słupsk, Arciszewskiego 22b, 76-200, Słupsk, Poland
| | - Piotr Perliński
- Department of Experimental Biology, Institute of Biology and Earth Science, Pomeranian University in Słupsk, Arciszewskiego 22b, 76-200, Słupsk, Poland.
| |
Collapse
|
15
|
D'Costa PM, Kunkolienkar RSS, Naik AG, Naik RK, Roy R. The response of Prorocentrum sigmoides
and its associated culturable bacteria to metals and organic pollutants. J Basic Microbiol 2019; 59:979-991. [DOI: 10.1002/jobm.201900244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/10/2019] [Accepted: 08/10/2019] [Indexed: 01/25/2023]
Affiliation(s)
- Priya M. D'Costa
- Department of Microbiology; Goa University; Taleigao Plateau Goa India
| | | | - Arti G. Naik
- Department of Microbiology; Goa University; Taleigao Plateau Goa India
| | - Ravidas K. Naik
- Southern Ocean Studies; ESSO-National Centre for Polar and Ocean Research; Vasco-da-Gama Goa India
| | - Rajdeep Roy
- National Remote-Sensing Centre-Earth and Climate Science Area; Indian Space Research Organization; Hyderabad Telangana India
| |
Collapse
|
16
|
Kazimierczak J, Wójcik EA, Witaszewska J, Guziński A, Górecka E, Stańczyk M, Kaczorek E, Siwicki AK, Dastych J. Complete genome sequences of Aeromonas and Pseudomonas phages as a supportive tool for development of antibacterial treatment in aquaculture. Virol J 2019; 16:4. [PMID: 30621713 PMCID: PMC6325676 DOI: 10.1186/s12985-018-1113-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 12/27/2018] [Indexed: 12/17/2022] Open
Abstract
Background Aquaculture is the fastest growing sector of food production worldwide. However, one of the major reasons limiting its effectiveness are infectious diseases among aquatic organisms resulting in vast economic losses. Fighting such infections with chemotherapy is normally used as a rapid and effective treatment. The rise of antibiotic resistance, however, is limiting the efficacy of antibiotics and creates environmental and human safety concerns due to their massive application in the aquatic environment. Bacteriophages are an alternative solution that could be considered in order to protect fish against pathogens while minimizing the side-effects for the environment and humans. Bacteriophages kill bacteria via different mechanisms than antibiotics, and so fit nicely into the ‘novel mode of action’ concept desired for all new antibacterial agents. Methods The bacteriophages were isolated from sewage water and characterized by RFLP, spectrum of specificity, transmission electron microscopy (TEM) and sequencing (WGS). Bioinformatics analysis of genomic data enables an in-depth characterization of phages and the choice of phages. This allows an optimised choice of phage for therapy, excluding those with toxin genes, virulence factor genes, and genes responsible for lysogeny. Results In this study, we isolated eleven new bacteriophages: seven infecting Aeromonas and four infecting Pseudomonas, which significantly increases the genomic information of Aeromonas and Pseudomonas phages. Bioinformatics analysis of genomic data, assessing the likelihood of these phages to enter the lysogenic cycle with experimental data on their specificity towards large number of bacterial field isolates representing different locations. Conclusions From 11 newly isolated bacteriophages only 6 (25AhydR2PP, 50AhydR13PP, 60AhydR15PP, 22PfluR64PP, 67PfluR64PP, 71PfluR64PP) have a potential to be used in phage therapy due to confirmed lytic lifestyle and absence of virulence or resistance genes. Electronic supplementary material The online version of this article (10.1186/s12985-018-1113-5) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Edyta Kaczorek
- Department of Microbiology and Clinical Immunology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Andrzej Krzysztof Siwicki
- Department of Microbiology and Clinical Immunology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | | |
Collapse
|
17
|
Frozen White-Leg Shrimp (Litopenaeus vannamei) in Korean Markets as a Source of Aeromonas spp. Harboring Antibiotic and Heavy Metal Resistance Genes. Microb Drug Resist 2018; 24:1587-1598. [DOI: 10.1089/mdr.2018.0035] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
18
|
Plant growth-promoting Rhizopseudomonas: expanded biotechnological purposes and antimicrobial resistance concern. ANN MICROBIOL 2018. [DOI: 10.1007/s13213-018-1389-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
|
19
|
Grün AY, App CB, Breidenbach A, Meier J, Metreveli G, Schaumann GE, Manz W. Effects of low dose silver nanoparticle treatment on the structure and community composition of bacterial freshwater biofilms. PLoS One 2018; 13:e0199132. [PMID: 29902242 PMCID: PMC6002094 DOI: 10.1371/journal.pone.0199132] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 06/03/2018] [Indexed: 12/22/2022] Open
Abstract
The application of engineered silver nanoparticles (AgNPs) in a considerable amount of registered commercial products inevitably will result in the continuous release of AgNPs into the natural aquatic environment. Therefore, native biofilms, as the prominent life form of microorganisms in almost all known ecosystems, will be subjected to AgNP exposure. Despite the exponentially growing research activities worldwide, it is still difficult to assess nanoparticle-mediated toxicity in natural environments. In order to obtain an ecotoxicologically relevant exposure scenario, we performed experiments with artificial stream mesocosm systems approaching low dose AgNP concentrations close to predicted environmental concentrations. Pregrown freshwater biofilms were exposed for 14 days to citrate-stabilized AgNPs at a concentration of 600 μg l-1 in two commonly used sizes (30 and 70 nm). Sublethal effects of AgNP treatment were assessed with regard to biofilm structure by gravimetric measurements (biofilm thickness and density) and by two biomass parameters, chlorophyll a and protein content. The composition of bacterial biofilm communities was characterized by t-RFLP fingerprinting combined with phylogenetic studies based on the 16S gene. After 14 days of treatment, the structural parameters of the biofilm such as thickness, density, and chlorophyll a and protein content were not statistically significantly changed by AgNP exposure. Furthermore, t-RFLP fingerprint analysis showed that the bacterial diversity was not diminished by AgNPs, as calculated by Shannon Wiener and evenness indices. Nevertheless, t-RFLP analysis also indicated that AgNPs led to an altered biofilm community composition as was shown by cluster analysis and multidimensional scaling (MDS) based on the Bray Curtis index. Sequence analysis of cloned 16S rRNA genes further revealed that changes in community composition were related with the displacement of putatively AgNP-sensitive bacterial taxa Actinobacteria, Chloroflexi, and Cyanobacteria by taxa known for their enhanced adaptability towards metal stress, such as Acidobacteria, Sphingomonadales, and Comamonadaceae. This measurable community shift, even after low dose AgNP treatment, causes serious concerns with respect to the broad application of AgNPs and their potentially adverse impact on the ecological function of lotic biofilms, such as biodegradation or biostabilization.
Collapse
Affiliation(s)
- Alexandra Y. Grün
- Institute for Integrated Natural Sciences, University of Koblenz-Landau, Koblenz, Germany
| | - Constantin B. App
- Institute for Integrated Natural Sciences, University of Koblenz-Landau, Koblenz, Germany
| | - Andreas Breidenbach
- Institute for Integrated Natural Sciences, University of Koblenz-Landau, Koblenz, Germany
| | - Jutta Meier
- Institute for Integrated Natural Sciences, University of Koblenz-Landau, Koblenz, Germany
| | - George Metreveli
- Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, University of Koblenz-Landau, Landau, Germany
| | - Gabriele E. Schaumann
- Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, University of Koblenz-Landau, Landau, Germany
| | - Werner Manz
- Institute for Integrated Natural Sciences, University of Koblenz-Landau, Koblenz, Germany
- * E-mail:
| |
Collapse
|
20
|
Nath S, Deb B, Sharma I. Isolation of toxic metal-tolerant bacteria from soil and examination of their bioaugmentation potentiality by pot studies in cadmium- and lead-contaminated soil. Int Microbiol 2018; 21:35-45. [PMID: 30810918 DOI: 10.1007/s10123-018-0003-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 03/17/2018] [Accepted: 03/19/2018] [Indexed: 10/17/2022]
Abstract
Heavy metals, also regarded as toxic metals, are the important environmental pollutants that affect all forms of life. Accumulation of toxic metals in plants results in various biochemical, physiological and structural disturbances, leading to inhibited growth and sometimes plant death. Toxic metal contamination disturbs the soil ecology as well as the agricultural productivity. Several indigenous microbes can withstand the effect of toxic metal and play a vital role in the revival of tarnished soil. In the present study, soil samples were collected from contaminated crop field of Cachar district of Assam, India. Segregation, enumeration and identification of bacteria from soil samples were performed. Among all the tested isolates, very few were able to withstand a high concentration of Cd and Pb in nutrient agar plates. Toxic metal-tolerant bacteria were identified as Pseudomonas aeruginosa and Bacillus cereus. The isolates having a higher tolerance for Cd and Pb were taken into consideration for pot studies. P. aeruginosa strain SN4 and strain SN5 showed significant results at Cd- and Pb-contaminated soil, evidenced by the healthy growth of Oryza sativa seedlings. However, B. cereus strain SN6 showed high tolerance towards Cd and Pb, but pot experimental studies showed adverse effects on seedling germination and shoot growth of O. sativa. P. aeruginosa strains were significantly able to reduce the negative impact of Cd and Pb in the soil, thus finding an alternative in removal, recovery and remediation of toxic metal-contaminated crop field.
Collapse
Affiliation(s)
- Soumitra Nath
- Department of Biotechnology, Gurucharan College, Silchar, Assam, 788004, India.
| | - Bibhas Deb
- Department of Biotechnology, Gurucharan College, Silchar, Assam, 788004, India
| | - Indu Sharma
- Department of Microbiology, Assam University, Silchar, 788011, Assam, India
| |
Collapse
|
21
|
Maravić A, Šamanić I, Šprung M, Fredotović Ž, Ilić N, Dragičević J, Puizina J. Broad-spectrum resistance of Pseudomonas aeruginosa from shellfish: infrequent acquisition of novel resistance mechanisms. ENVIRONMENTAL MONITORING AND ASSESSMENT 2018; 190:81. [PMID: 29335824 DOI: 10.1007/s10661-018-6471-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 01/08/2018] [Indexed: 06/07/2023]
Abstract
Pseudomonas aeruginosa is one the most common multidrug-resistant pathogens worldwide. It has been previously detected in marine shellfish, but its antibiotic resistance in such environment has not been explored. By combining PCR detection of acquired genes, and resistance-nodulation-cell division (RND) efflux studying, we investigated the multifactorial resistance traits of 108 P. aeruginosa isolates recovered from wild-growing Mediterranean mussels (Mytilus galloprovincialis) in Croatia. Eleven different resistance profiles were found, with the main mechanism being the overexpression of intrinsic efflux pump(s), particularly MexAB-OprM. Several acquired resistance determinants were detected, including the β-lactamase gene blaTEM-116, sulfamethoxazole resistance gene sul1, and the class 1 integron gene cassette carrying the streptomycin resistance gene aadA7. This study evidenced the multiple resistance in P. aeruginosa in shellfish from human-impacted marine environment, pointing to the underestimated role of the marine habitat for maintenance of multiresistant P. aeruginosa and, consequently, the potential risk for human and environmental health.
Collapse
Affiliation(s)
- Ana Maravić
- Department of Biology, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000, Split, Croatia.
| | - Ivica Šamanić
- Department of Biology, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000, Split, Croatia
| | - Matilda Šprung
- Department of Chemistry, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000, Split, Croatia
| | - Željana Fredotović
- Department of Biology, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000, Split, Croatia
| | - Nada Ilić
- Department of Physics, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000, Split, Croatia
| | - Josipa Dragičević
- Department of Biology, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000, Split, Croatia
| | - Jasna Puizina
- Department of Biology, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000, Split, Croatia
| |
Collapse
|
22
|
Zhang H, Ma Y, Liu P, Li X. Multidrug resistance operon emrAB contributes for chromate and ampicillin co-resistance in a Staphylococcus strain isolated from refinery polluted river bank. SPRINGERPLUS 2016; 5:1648. [PMID: 27722066 PMCID: PMC5033799 DOI: 10.1186/s40064-016-3253-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 09/08/2016] [Indexed: 01/18/2023]
Abstract
EmrAB operon is known for multidrug resistance in bacteria and yet has not been reported related to heavy metal resistance or antibiotics/heavy metal co-resistance. Strain Staphylococcus aureus LZ-01 which was isolated from industrial wastewater discharging site can co-resist to 6 mM Cr(VI) and 0.75 mg/ml ampicillin. Transcriptome data showed that an emrAB operon was upregulated (1.29-folds for emrA, 2.14-folds for emrB) under 0.4 mM Cr(VI) treatment. Quantitative PCR results revealed that this operon was upregulated (1.60-folds for emrA, 2.34-folds for emrB) after 0.20 mg/ml ampicillin treatment. Mutant strain with emrA gene knockout resulted in a 0.83-folds decrease in chromate resistance, and a 0.80-folds decrease in ampicillin resistance; while emrB knockout strain resulted in a 0.33-folds decrease in chromate resistance, and a 0.60-folds decrease in ampicillin resistance. The complemented strains of both deletion mutants basically restored their resistant performance. The presence of 0.50 mM Cr(VI) induced an elevation in ampicillin resistance from 0.50 to 2.50 mg/ml in the strain LZ-01, similarly, its Cr(VI) resistance was also found to be elevated from 6 to 10 mM by 0.15 mg/ml ampicillin induction. The induction effect could be eliminated by deletion of emrA or emrB. Our results demonstrated that the chromosomal emrAB operon in Staphylococcus aureus LZ-01 was a new type of multidrug resistance system, which conferred both ampicillin and chromate resistance to host cells inhabiting polluted environments.
Collapse
Affiliation(s)
- He Zhang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou, 730000 Gansu People's Republic of China
| | - Yantian Ma
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou, 730000 Gansu People's Republic of China ; School of Life Sciences, Nanchang University, Nanchang, 300031 Jiangxi People's Republic of China
| | - Pu Liu
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou, 730000 Gansu People's Republic of China
| | - Xiangkai Li
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou, 730000 Gansu People's Republic of China
| |
Collapse
|
23
|
Xu YB, Xu JX, Chen JL, Huang L, Zhou SQ, Zhou Y, Wen LH. Antioxidative responses of Pseudomonas fluorescens YZ2 to simultaneous exposure of Zn and Cefradine. ECOTOXICOLOGY (LONDON, ENGLAND) 2015; 24:1788-1797. [PMID: 26141733 DOI: 10.1007/s10646-015-1516-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/24/2015] [Indexed: 06/04/2023]
Abstract
Binary pollution of both heavy metals and antibiotics has received increasing attentions for their joint effects of eco-toxicity and health hazards. To reveal the effects of mixtures of different pollutants on bacterial antioxidant response system, Pseudomonas fluorescens ZY2, a new strain isolated from swine wastewater, was chosen to determinate growth (bacterial density OD600), reactive oxygen species (ROS) concentration, protein concentration and superoxide dismutase (SOD) activity under exposure treatments of Zn, Cefradine or Zn + Cefradine. Bacterial densities of all the treatment groups increased significantly over the incubation time, but those containing pollutant addition were slightly lower than the control at different times of incubation. Both ROS concentration and SOD activity increased first and then decreased (p < 0.01) over time, which was opposite to the protein concentrations (p < 0.01), showing a much significant increase by Cefradine alone. With Zn concentration increasing from 40 to 160 mg/L, the intracellular SOD activity increased as a response to the improvement of ROS (p < 0.05), while the balance between ROS and SOD was broken down due to the disproportionate change of total SOD activity and ROS concentration, the bacterial densities therefore decreased for the weak resistance. With the combined treatment of Zn (200 mg/L) and Cefradine (1 mg/L), though the toxicity of Zn caused a much significant increase of ROS, the bacterial resistance was further improved showing a more significant increase of total SOD activity and the bacterial densities therefore increased bacterial growth. Zn concentration also affected the protein synthesis. Either single or binary stress induced the bacterial resistance by regulating SOD activity to eliminate ROS. All results of the bacterial oxidant stress, SOD response and protein synthesis in the combined treatment groups were more complicated than those in single treatment groups, which depended on the properties of the single treatment as well as the interaction between the two treatments upon bacterial activity. For P. fluorescens ZY2, the mediation of SOD activity to eliminate ROS in response to the combined exposure to Zn and Cefradine was first revealed as one of the co-resistance mechanisms, which is informative to further understanding the risk of antibiotics resistant bacteria to human and environmental health more accurately.
Collapse
Affiliation(s)
- Yan-Bin Xu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China.
- College of Environmental Science and Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China.
- State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, 510641, People's Republic of China.
- Key Laboratory of Environmental Protection and Eco-remediation of Guangdong Regular Higher Education Institutions, Guangzhou Higher Education Mega Center, South China University of Technology, Guangzhou, 510006, People's Republic of China.
| | - Jia-Xin Xu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China
| | - Jin-Liang Chen
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China
| | - Lu Huang
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China
| | - Shao-Qi Zhou
- College of Environmental Science and Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China.
- State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, 510641, People's Republic of China.
- Key Laboratory of Environmental Protection and Eco-remediation of Guangdong Regular Higher Education Institutions, Guangzhou Higher Education Mega Center, South China University of Technology, Guangzhou, 510006, People's Republic of China.
- Guizhou Academy of Sciences, Shanxi Road 1#, Guiyang, 550001, People's Republic of China.
| | - Yan Zhou
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China
| | - Li-Hua Wen
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China
| |
Collapse
|
24
|
Heck K, De Marco ÉG, Duarte MW, Salamoni SP, Van Der Sand S. Pattern of multiresistant to antimicrobials and heavy metal tolerance in bacteria isolated from sewage sludge samples from a composting process at a recycling plant in southern Brazil. ENVIRONMENTAL MONITORING AND ASSESSMENT 2015; 187:328. [PMID: 25944755 DOI: 10.1007/s10661-015-4575-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 04/29/2015] [Indexed: 06/04/2023]
Abstract
The composting process is a viable alternative for the recycling of household organic waste and sewage sludge generated during wastewater treatment. However, this technique can select microorganisms resistant to antimicrobials and heavy metals as a result of excess chemicals present in compost windrow. This study evaluates the antimicrobial multiresistant and tolerance to heavy metals in bacteria isolated from the composting process with sewage sludge. Fourteen antimicrobials were used in 344 strains for the resistance profile and four heavy metals (chromium, copper, zinc, and lead) for the minimum biocide concentration assay. The strains used were from the sewage sludge sample (beginning of the process) and the compost sample (end of the process). Strains with higher antimicrobial and heavy metal profile were identified by 16S rRNA gene sequencing. The results showed a multiresistant profile in 48 % of the strains, with the highest percentage of strains resistant to nitrofurantoin (65 %) and β-lactams (58 %). The strains isolated from the sewage sludge and the end of the composting process were more tolerant to copper, with a lethal dose of approximately 900 mg L(-1) for about 50 % of the strains. The genera that showed the highest multiresistant profile and increased tolerance to the metals tested were Pseudomonas and Ochrobactrum. The results of this study may contribute to future research and the revision and regulation of legislation on sewage sludge reuse in soils.
Collapse
Affiliation(s)
- Karina Heck
- Departmento de Microbiologia, Immunologia e Parasitologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | | | | | | |
Collapse
|
25
|
Xu YB, Zhou Y, Ruan JJ, Xu SH, Gu JD, Huang SS, Zheng L, Yuan BH, Wen LH. Endogenous nitric oxide in Pseudomonas fluorescens ZY2 as mediator against the combined exposure to zinc and cefradine. ECOTOXICOLOGY (LONDON, ENGLAND) 2015; 24:835-843. [PMID: 25678231 DOI: 10.1007/s10646-015-1428-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/05/2015] [Indexed: 06/04/2023]
Abstract
A better understanding on the mechanism involved in bacterial resistance to combined exposure to antibiotics and heavy metals is helpful in implementing practices to mitigate their ecological risk and spread of resistance genes in microbial population. Pseudomonas fluorescens ZY2, a strain isolated from swine wastewater, was chosen to study its growth (bacterial density OD600), the formation of reactive oxygen species (ROS), nitric oxide (NO) and NO synthases (NOS) under Zn, cefradine or Zn + cefradine treatments. Using Zn and cefradine as representative heavy metal and antibiotic in this investigation, respectively, the resistance of P. fluorescens ZY2 to toxic chemical exposure was investigated. Bacterial densities of treatment groups significantly increased over the time of incubation, but less than the control. ROS, NO and NOS initially increased, but then decreased after the initial 8 h of culturing, and were positively related to Zn concentrations. Moreover, the formation of ROS, NOS, and NO was activated by cefradine at Zn of up to 160 mg/L, but inhibited at Zn of 200 mg/L whether cefradine was added or not. Zn concentration affected ROS and NO concentrations between treatments and also was closely related to the variation of the relative bacterial density. For P. fluorescens ZY2, the mediation of endogenous NO to overcome ROS in response to the combined exposure of Zn and cefradine was suggested as a co-resistance mechanism, which would be beneficial to evaluate the ecological risk of heavy metals and antibiotics.
Collapse
Affiliation(s)
- Yan-Bin Xu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China,
| | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Zhou Y, Xu YB, Xu JX, Zhang XH, Xu SH, Du QP. Combined toxic effects of heavy metals and antibiotics on a Pseudomonas fluorescens strain ZY2 isolated from swine wastewater. Int J Mol Sci 2015; 16:2839-50. [PMID: 25633105 PMCID: PMC4346868 DOI: 10.3390/ijms16022839] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 01/07/2015] [Accepted: 01/14/2015] [Indexed: 11/20/2022] Open
Abstract
A Pseudomonas fluorescens strain ZY2, isolated from swine wastewater, was used to investigate the synergistic effects of five heavy metals (Pb, Cu, Zn, Cr(VI) and Hg) on bacterial resistance to antibiotics. Results indicate that the combined effects of antibiotic type, heavy metal type and concentration were significant (p < 0.01). Cross-resistance to Hg and antibiotics was the most noticeable. Moreover, the resistance to Hg and cefradine or amoxicillin, and Cr and amoxicillin were synergistic for low heavy metal concentrations, and turned antagonistic with increasing concentrations, while the resistances to Cr or Cu and cefradine, Pb or Cu and amoxicillin, Cu and norfloxacin showed reverse effects. In addition, resistance to Zn and amoxicillin were always synergetic, while resistance to Pb and cefradine or norfloxacin, Cr or Hg and norfloxacin as well as all the heavy metals and tetracycline were antagonistic. These results indicate that bacterial resistance to antibiotics can be affected by the type and concentration of co-exposed heavy metals and may further threaten people’s health and ecological security severely via horizontal gene transfer.
Collapse
Affiliation(s)
- Yan Zhou
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - Yan-Bin Xu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - Jia-Xin Xu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - Xiao-Hua Zhang
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - Shi-Hui Xu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - Qing-Ping Du
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| |
Collapse
|
27
|
Banerjee S, Gothalwal R, Sahu PK, Sao S. Microbial Observation in Bioaccumulation of Heavy Metals from the Ash Dyke of Thermal Power Plants of Chhattisgarh, India. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/abb.2015.62013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
28
|
Bacteria from spent engine-oil-contaminated soils possess dual tolerance to hydrocarbon and heavy metals, and degrade spent oil in the presence of copper, lead, zinc and combinations thereof. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-014-0851-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
29
|
Nguyen HNK, Van TTH, Nguyen HT, Smooker PM, Shimeta J, Coloe PJ. Molecular characterization of antibiotic resistance in Pseudomonas and Aeromonas isolates from catfish of the Mekong Delta, Vietnam. Vet Microbiol 2014; 171:397-405. [PMID: 24629778 DOI: 10.1016/j.vetmic.2014.01.028] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 01/24/2014] [Accepted: 01/25/2014] [Indexed: 12/01/2022]
Abstract
A collection of 116 motile Pseudomonas spp. and 92 Aeromonas spp. isolated from 15 Vietnamese intensive catfish farms was analyzed to examine the molecular antibiotic resistance characteristics and the transferability of resistance markers within and between species. High levels of resistance to ampicillin, trimethoprim/sulfamethoxazole, nalidixic acid, chloramphenicol, and nitrofurantoin were observed. The percentage of multiple drug resistance of Pseudomonas spp. and Aeromonas spp. isolates was 96.6% and 61.9%, respectively. The multiple antibiotic resistance (MAR) index mean values of 0.457 and 0.293 of Pseudomonas and Aeromonas isolates, respectively, indicated that these isolates were exposed to high risk sources of contamination where antibiotics were commonly used. Approximately 33% of Pseudomonas spp. and 28% of Aeromonas spp. isolates from catfish contained class 1 integrons, but no class 2 integrons were detected. Several common resistance genes including aadA, dfrA and catB were harbored in class 1 integrons. Large plasmids (>55 kb) were frequently detected in 50% and 71.4% of the plasmids extracted from Pseudomonas and Aeromonas isolates, respectively. Conjugation and transformation experiments demonstrated the successful transfer of all or part of the resistance phenotypes of catfish isolates to the recipient strains, including laboratory strains and strains isolated from this study. These results highlight the likely role of catfish bacteria as a reservoir of antibiotic resistant, Gram-negative bacteria harboring a pool of mobile genetic elements that can readily be transferred intra- and interspecies. To our knowledge, this is the first report on molecular characterization of antibiotic resistance of bacteria isolated from catfish in Vietnam.
Collapse
Affiliation(s)
- Hoang Nam Kha Nguyen
- Faculty of Fisheries, Nong Lam University, Thu Duc District, Ho Chi Minh City, Viet Nam; School of Applied Sciences, RMIT University, Bundoora West Campus, Bundoora, Victoria 3083, Australia
| | - Thi Thu Hao Van
- School of Applied Sciences, RMIT University, Bundoora West Campus, Bundoora, Victoria 3083, Australia
| | - Huu Thinh Nguyen
- Faculty of Fisheries, Nong Lam University, Thu Duc District, Ho Chi Minh City, Viet Nam
| | - Peter M Smooker
- School of Applied Sciences, RMIT University, Bundoora West Campus, Bundoora, Victoria 3083, Australia
| | - Jeff Shimeta
- School of Applied Sciences, RMIT University, Bundoora West Campus, Bundoora, Victoria 3083, Australia
| | - Peter J Coloe
- School of Applied Sciences, RMIT University, Bundoora West Campus, Bundoora, Victoria 3083, Australia.
| |
Collapse
|
30
|
Antibiotic and heavy metal resistance in Gram-negative bacteria isolated from the Seyhan Dam Lake and Seyhan River in Turkey. ANN MICROBIOL 2013. [DOI: 10.1007/s13213-013-0740-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
|
31
|
Seiler C, Berendonk TU. Heavy metal driven co-selection of antibiotic resistance in soil and water bodies impacted by agriculture and aquaculture. Front Microbiol 2012; 3:399. [PMID: 23248620 PMCID: PMC3522115 DOI: 10.3389/fmicb.2012.00399] [Citation(s) in RCA: 588] [Impact Index Per Article: 49.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Accepted: 10/30/2012] [Indexed: 11/13/2022] Open
Abstract
The use of antibiotic agents as growth promoters was banned in animal husbandry to prevent the selection and spread of antibiotic resistance. However, in addition to antibiotic agents, heavy metals used in animal farming and aquaculture might promote the spread of antibiotic resistance via co-selection. To investigate which heavy metals are likely to co-select for antibiotic resistance in soil and water, the available data on heavy metal pollution, heavy metal toxicity, heavy metal tolerance, and co-selection mechanisms was reviewed. Additionally, the risk of metal driven co-selection of antibiotic resistance in the environment was assessed based on heavy metal concentrations that potentially induce this co-selection process. Analyses of the data indicate that agricultural and aquacultural practices represent major sources of soil and water contamination with moderately to highly toxic metals such as mercury (Hg), cadmium (Cd), copper (Cu), and zinc (Zn). If those metals reach the environment and accumulate to critical concentrations they can trigger co-selection of antibiotic resistance. Furthermore, co-selection mechanisms for these heavy metals and clinically as well as veterinary relevant antibiotics have been described. Therefore, studies investigating co-selection in environments impacted by agriculture and aquaculture should focus on Hg, Cd, Cu, and Zn as selecting heavy metals. Nevertheless, the respective environmental background has to be taken into account.
Collapse
Affiliation(s)
- Claudia Seiler
- Institute of Hydrobiology, Technische Universität Dresden Dresden, Germany
| | | |
Collapse
|
32
|
da Silva VL, Caçador NC, da Silva CDSF, Fontes CO, Garcia GD, Nicoli JR, Diniz CG. Occurrence of multidrug-resistant and toxic-metal tolerant enterococci in fresh feces from urban pigeons in Brazil. Microbes Environ 2012; 27:179-85. [PMID: 22791051 PMCID: PMC4036010 DOI: 10.1264/jsme2.me11296] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Enterococcus are emerging as important putative pathogens resistant to chemicals that are widely released into the environment, and urban pigeons might act as a natural reservoir contributing to the spread of resistant strains. This study aimed to evaluate the occurrence of Enterococcus in pigeon feces and their antimicrobial and toxic metal susceptibility. Bacteria were isolated and identified from 150 fresh feces by phenotypic and genetic techniques. Antimicrobial and toxic metal susceptibility was determined by the agar dilution method, and the multiple antibiotic resistance index (MAR) was calculated. Out of 120 isolates, no resistance was observed against penicillin and vancomycin, but was observed against gentamicin (55.8%), chloramphenicol (21.7%), tetracycline (13.3%), ciprofloxacin (8.4%) and rifampin (2.5%). 18.3% presented a MAR index ≥0.2, ranging between 0.14 to 0.57, indicating resistance to more than one antimicrobial. All samples were tolerant to >1024 μg mL−1 zinc and chromium. Minimal inhibitory concentration (MIC) of 1,024 μg mL−1 was observed for copper (100%) and nickel (71.4%). Mercury inhibited 88.4% at 32 μg mL−1 and the MIC for cadmium ranged from 0.125–128 μg mL−1. Since pigeons were found to harbor drug-resistant Enterococcus, our data support that their presence in the urban environment may contribute to the spread of resistance, with an impact on public health.
Collapse
Affiliation(s)
- Vânia Lúcia da Silva
- Department of Parasitology, Microbiology and Immunology, Institute of Biological Sciences, Federal University of Juiz de Fora, Juiz de Fora, Brazil.
| | | | | | | | | | | | | |
Collapse
|
33
|
Resende JA, Silva VL, Fontes CO, Souza-Filho JA, Rocha de Oliveira TL, Coelho CM, César DE, Diniz CG. Multidrug-resistance and toxic metal tolerance of medically important bacteria isolated from an aquaculture system. Microbes Environ 2012; 27:449-55. [PMID: 22972388 PMCID: PMC4103553 DOI: 10.1264/jsme2.me12049] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The use of antimicrobials and toxic metals should be considered carefully in aquaculture and surrounding environments. We aimed to evaluate medically relevant bacteria in an aquaculture system and their susceptibility to antimicrobials and toxic metals. Selective cultures for enterobacteria (ENT), non-fermenting Gram-negative rods (NFR) and Gram-positive cocci (GPC) were obtained from water samples collected in two different year seasons. The isolated bacteria were biochemically identified and antimicrobial and toxic metal susceptibility patterns were determined. Overall, 407 representative strains were recovered. In general, bacteria isolated from fish ponds showed higher multiple antibiotic resistance indices when compared to those isolated from a water-fed canal. Resistance to penicillin and azithromycin was observed more frequently in the GPC group, whereas resistance to ampicillin and ampicillin/sulbactam or gentamicin was observed more frequently in the ENT and NFR groups, respectively. All the isolated bacteria were tolerant to nickel, zinc, chromium and copper at high levels (≥1,024 μg mL−1), whereas tolerance to cadmium and mercury varied among the isolated bacteria (2–1,024 μg mL−1). Multidrug-resistant bacteria were more frequent and diverse in fish ponds than in the water-fed canal. A positive correlation was observed between antimicrobial resistance and metal tolerance. The data point out the need for water treatment associated with the aquaculture system.
Collapse
Affiliation(s)
- Juliana Alves Resende
- Department of Parasitology, Microbiology and Immunology, Federal University of Juiz de Fora, Juiz de Fora, Minas Gerais, 36036–631, Brazil
| | | | | | | | | | | | | | | |
Collapse
|
34
|
Peixoto L, SÁ M, Gordiano L, Costa M. Aeromonas spp.: fatores de virulência e perfis de resistência a antimicrobianos e metais pesados. ARQUIVOS DO INSTITUTO BIOLÓGICO 2012. [DOI: 10.1590/s1808-16572012000300020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
As bactérias do gênero Aeromonas spp. são considerados como patógenos oportunistas carreadores de múltiplos fatores de virulência. O fenômeno da resistência aos antimicrobianos e metais pesados constitui outro problema, podendo ocorrer por diferentes fatores, dentre eles o uso indiscriminado de agentes antimicrobianos, poluição ambiental e a presença de mecanismos de resistência, como bombas de efluxo, sendo que muitos destes podem ser transmitidos por elementos genéticos móveis como os plasmídeos. O objetivo desse artigo é fazer uma revisão bibliográfica sobre os fatores de virulência, resistência a antimicrobianos e metais pesados, bem como os mecanismos que podem intervir nessa resistência e sua transferência entre bactérias do gênero Aeromonas. Os estudos dos fatores envolvidos no mecanismo de surgimento da resistência, aliado aos estudos de biologia molecular, fornecem subsídios para elaboração de métodos de controle e profilaxia dessas enfermidades de impacto aos organismos aquáticos, seres humanos e meio ambiente.
Collapse
Affiliation(s)
| | - M.C.A SÁ
- Universidade Federal do Vale do São Francisco, Brasil
| | - L.A Gordiano
- Universidade Federal do Vale do São Francisco, Brasil
| | - M.M. Costa
- Universidade Federal do Vale do São Francisco, Brasil
| |
Collapse
|
35
|
Zhang Y, Cai X, Lang X, Qiao X, Li X, Chen J. Insights into aquatic toxicities of the antibiotics oxytetracycline and ciprofloxacin in the presence of metal: complexation versus mixture. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2012; 166:48-56. [PMID: 22475550 DOI: 10.1016/j.envpol.2012.03.009] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Revised: 02/29/2012] [Accepted: 03/02/2012] [Indexed: 05/28/2023]
Abstract
Co-contamination of ligand-like antibiotics (e.g., tetracyclines and quinolones) and heavy metals prevails in the environment, and thus the complexation between them is involved in environmental risks of antibiotics. To understand toxicological significance of the complex, effects of metal coordination on antibiotics' toxicity were investigated. The complexation of two antibiotics, oxytetracycline and ciprofloxacin, with three heavy metals, copper, zinc, and cadmium, was verified by spectroscopic techniques. The antibiotics bound metals via multiple coordination sites and rendered a mixture of various complexation speciations. Toxicity analysis indicated that metal coordination did modify the toxicity of the antibiotics and that antibiotic, metal, and their complex acted primarily as concentration addition. Comparison of EC(50) values revealed that the complex commonly was highest toxic and predominately correlated in toxicity to the mixture. Finally, environmental scenario analysis demonstrated that ignoring complexation would improperly classify environmental risks of the antibiotics.
Collapse
Affiliation(s)
- Yu Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | | | | | | | | | | |
Collapse
|
36
|
The isolation of heavy-metal resistant culturable bacteria and resistance determinants from a heavy-metal-contaminated site. Biologia (Bratisl) 2010. [DOI: 10.2478/s11756-010-0145-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|