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Lu J, Guo J. Prophage induction by non-antibiotic compounds promotes transformation of released antibiotic resistance genes from cell lysis. WATER RESEARCH 2024; 263:122200. [PMID: 39111212 DOI: 10.1016/j.watres.2024.122200] [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: 05/29/2024] [Revised: 07/28/2024] [Accepted: 07/31/2024] [Indexed: 08/26/2024]
Abstract
Prophages are prevalent among bacterial species, including strains carrying antibiotic resistance genes (ARGs). Prophage induction can be triggered by the SOS response to stressors, leading to cell lysis. In environments polluted by chemical stressors, ARGs and prophage co-harboring strains might pose an unknown risk of spreading ARGs through chemical pollutant-mediated prophage induction and subsequent cell lysis. In this study, we investigated the effects of common non-antibiotic water pollutants, triclosan and silver nanoparticles, on triggering prophage induction in clinical isolates carrying ARGs and the subsequent uptake of released ARGs by the naturally competent bacterium Acinetobacter baylyi. Our results demonstrate that both triclosan and silver nanoparticles, at environmentally relevant concentrations and those found in commercial products, significantly enhance prophage induction among various clinical isolates. Transmission electron microscopy imaging and plaque assays confirmed the production of infectious phage particles under non-antibiotic pollutants-mediated prophage induction. In addition, the rate of ARG transformation to A. baylyi significantly increased after the release of extracellular ARGs from prophage induction-mediated cell lysis. The mechanism of non-antibiotic pollutants-mediated prophage induction is primarily associated with excessive oxidative stress, which provokes the SOS response. Our findings offer insights into the role of non-antibiotic pollutants in promoting the dissemination of ARGs by triggering prophage induction.
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Affiliation(s)
- Ji Lu
- Australian Centre for Water and Environmental Biotechnology (ACWEB, formerly AWMC), The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Jianhua Guo
- Australian Centre for Water and Environmental Biotechnology (ACWEB, formerly AWMC), The University of Queensland, St. Lucia, Queensland 4072, Australia.
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2
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Fawi HMT, Papastergiou P, Khan F, Hart A, Coleman NP. Use of monofilament sutures and triclosan coating to protect against surgical site infections in spinal surgery: a laboratory-based study. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY & TRAUMATOLOGY : ORTHOPEDIE TRAUMATOLOGIE 2023; 33:3051-3058. [PMID: 37000241 PMCID: PMC10504140 DOI: 10.1007/s00590-023-03534-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 03/20/2023] [Indexed: 04/01/2023]
Abstract
PURPOSE We investigated bacterial propagation through multifilament, monofilament sutures and whether sutures coated with triclosan would exhibit a different phenomenon. METHODS One centimetre (cm) wide trenches were cut in the middle of Columbia blood Agar plates. We tested a 6 cm length of two Triclosan-coated (PDS plus®, Vicryl plus®) and two uncoated (PDS ®, Vicryl ®) sutures. Each suture was inoculated with a bacterial suspension containing methicillin-sensitive Staphylococcus aureus (MSSA), Escherichia coli (E. coli), Staphylococcus epidermidis, methicillin-resistant Staphylococcus aureus (MRSA) at one end of each suture. The plates were incubated at 36C for 48 h, followed by room temperature for a further 5 days. We established bacterial propagation by observing for any bacterial growth on the Agar on the opposite side of the trench. RESULTS Bacterial propagation was observed on the opposite side of the trench with both suture types, monofilament PDS and multifilament Vicryl, when tested with the motile bacterium (E. coli). Propagation was not observed on the other side of the trench with the monofilament PDS suture following incubation with MSSA and S. epidermidis, and in 66% of MRSA. With multifilament suture Vicryl, propagation was observed on the other side of the trench in 90% (MSSA), 80% (S. epidermidis), and 100% (MRSA) of plates tested. No bacterial propagation was observed in any of the triclosan-coated sutures (monofilament or multifilament). CONCLUSIONS Monofilament sutures are associated in vitro with less bacterial propagation along their course when compared to multifilament sutures. Inhibition in both sutures can be further enhanced with a triclosan coating.
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Affiliation(s)
- H M T Fawi
- Trauma and Orthopaedics Department, Queen Elizabeth Hospital NHS Trust, Kings Lynn, UK.
- School of Public Health, Imperial College London, London, UK.
| | - P Papastergiou
- Microbiology Department, Limassol General Hospital, Kato Polemidia, Cyprus
- Microbiology Department, Norfolk & Norwich University Hospital NHS Trust, Norwich, UK
| | - F Khan
- School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - A Hart
- Microbiology Department, Norfolk & Norwich University Hospital NHS Trust, Norwich, UK
| | - N P Coleman
- Trauma and Orthopaedics Department, Queen Elizabeth Hospital NHS Trust, Kings Lynn, UK
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Muacevic A, Adler JR. Ototoxicity of Triclosan: A Rat Model Study. Cureus 2022; 14:e32189. [PMID: 36505955 PMCID: PMC9728979 DOI: 10.7759/cureus.32189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/04/2022] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVE Triclosan is utilized as an antibacterial factor in many industrial products. Although there are many toxic features of triclosan in the literature, there is no study on the effect of triclosan on hearing. The purpose of this study is to determine the effect of triclosan on hearing in rats. METHODS In this prospective, experimental animal study, 40 healthy Sprague-Dawley rats with normal response to the distortion-product otoacoustic emission (DPOAE) measurements were divided into four groups. Group 1, as the control group, was given only corn oil, group 2 was given 5 mg/kg triclosan dissolved in corn oil, group 3 was given 10 mg/kg triclosan dissolved in corn oil, and group 4 was given 100 mg/kg triclosan dissolved in corn oil; triclosan and corn oil were administered by oral gavage to all groups. RESULTS In our study, low-dose triclosan did not cause hearing loss, but hearing loss was observed in the group that was given high-dose triclosan (100 mg/kg). CONCLUSION These findings suggest that triclosan causes hearing loss in rats. This issue should be investigated further to avoid triclosan ototoxicity in humans.
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Samet M, Ghazala I, Karray F, Abid C, Chiab N, Nouri-Ellouz O, Sayadi S, Gargouri-Bouzid R. Isolation of bacterial strains from compost teas and screening of their PGPR properties on potato plants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:75365-75379. [PMID: 35653020 DOI: 10.1007/s11356-022-21046-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
The beneficial effect of compost and compost tea on plant growth and protection is mainly associated with the microbial diversity and the presence of bacteria with plant growth-promoting effect. PGPR are considered as eco-friendly bio-fertilizers that may reduce the use of chemical pesticides and fertilizers. Three composts (AT, A10, and A30) were previously prepared from industrial wastes (olive mill wastewater, olive pomace, coffee ground, and phosphogypsum). In the present study, we isolated three bacterial strains from the compost teas. The phylogenetic identification of these bacterial strains (B.AT, B.A10, and B.A30) showed that they correspond to Serratia liquefaciens (B.AT and B.A10) and Achromobacter spanius (B.A30) species. A further characterization of the PGPR traits of these bacteria showed that they produce siderophore, exopolysaccharides, and IAA. Their effect on potato plant growth, yields, and tuber quality was performed under field culture conditions. Results showed that these strains can be characterized as PGPR, the best effect on potato plant growth was observed with Serratia liquefaciens (B.AT), the best yield and tuber quality was observed with Serratia liquefaciens (B.A10) while bacterial treatment with Achromobacter spanius (B.A30) is a Cd-tolerant PGPR.
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Affiliation(s)
- Mariem Samet
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia.
| | - Imen Ghazala
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
| | - Fatma Karray
- Laboratory of Environmental Bioprocesses, Sfax Biotechnology Center, Road of Sidi Mansour km6, BP 1177, 3018, Sfax, Tunisia
| | - Cyrine Abid
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
| | - Nour Chiab
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
| | - Oumèma Nouri-Ellouz
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
| | - Sami Sayadi
- Biotechnology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, 2713, Doha, Qatar
| | - Radhia Gargouri-Bouzid
- Laboratory of Plant Improvement and Agro-Resources Valorization, National School of Engineers of Sfax, road of Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
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McFarland AG, Bertucci HK, Littman E, Shen J, Huttenhower C, Hartmann EM. Triclosan Tolerance Is Driven by a Conserved Mechanism in Diverse Pseudomonas Species. Appl Environ Microbiol 2021; 87:e02924-20. [PMID: 33483311 PMCID: PMC8091609 DOI: 10.1128/aem.02924-20] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 01/20/2021] [Indexed: 02/04/2023] Open
Abstract
Perturbation of natural microbial communities by antimicrobials, such as triclosan, can result in selection for antibiotic tolerance, which is of particular concern when pathogens are present. Members of the genus Pseudomonas are found in many natural microbial communities and frequently demonstrate increased abundance following triclosan exposure. The pathogen and well-studied model organism Pseudomonas aeruginosa exhibits high triclosan tolerance; however, it is unknown if all Pseudomonas species share this trait or if there are susceptible strains. We characterized the triclosan tolerance phenotypes of diverse Pseudomonas isolates obtained from triclosan-exposed built environments and identified both tolerant and sensitive strains. High tolerance is associated with carriage of the enoyl-acyl carrier reductase (ENR) isozyme gene fabV, compared to the lesser protective effects of efflux or presence of ENRs. Given its unique importance, we examined fabV distribution throughout Pseudomonas species using large-scale phylogenomic analyses. We find fabV presence or absence is largely invariant at the species level but demonstrates multiple gain and loss events in its evolutionary history. We further provide evidence of its presence on mobile genetic elements. Our results demonstrate the surprising variability in triclosan tolerance in Pseudomonas and confirm fabV to be a useful indicator for high triclosan tolerance in Pseudomonas These findings provide a framework for better monitoring of Pseudomonas in triclosan-exposed environments and interpreting effects on species and gene composition.IMPORTANCE Closely related species are typically assumed to demonstrate similar phenotypes driven by underlying conserved genotypes. When monitoring for the effect of antimicrobials on the types of species that may be selected for, this assumption may prove to be incorrect, and identification of additional genetic markers may be necessary. We isolated several phylogenetically diverse members of Pseudomonas from indoor environments and tested their phenotypic tolerance toward the commonly used antimicrobial triclosan. Although Pseudomonas isolates are broadly regarded to be highly triclosan tolerant, we demonstrate the presence of both triclosan-tolerant and -susceptible strains, separated by a difference in tolerance of nearly 3 orders of magnitude. Bioinformatic and experimental investigation demonstrated that the presence of the gene fabV was associated with high tolerance. We demonstrate that fabV is not evenly distributed in all Pseudomonas species and that its presence could be a useful predictor of high triclosan tolerance suitable for antimicrobial monitoring efforts involving triclosan.
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Affiliation(s)
- Alexander G McFarland
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois, USA
| | - Hanna K Bertucci
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois, USA
| | - Erica Littman
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois, USA
| | - Jiaxian Shen
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois, USA
| | - Curtis Huttenhower
- Harvard Chan Microbiome in Public Health Center, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Infectious Disease and Microbiome Program, Broad Institute, Cambridge, Massachusetts, USA
| | - Erica M Hartmann
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois, USA
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Chambers LE, Chang M, Boyina K, Williams A, Dye R, Miller RV, DeGear MA, Assefa S, Köhler GA, Champlin FR. Disparate outer membrane exclusionary properties underlie intrinsic resistance to hydrophobic substances in Pseudomonas spp. isolated from surface waters under triclosan selection. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:257-268. [PMID: 33411598 DOI: 10.1080/10934529.2020.1868822] [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: 09/20/2020] [Revised: 12/14/2020] [Accepted: 12/17/2020] [Indexed: 06/12/2023]
Abstract
Representative members of surface water microbiota were obtained from three unrelated municipal sites in Oklahoma by direct plating under selection by the hydrophobic biocide triclosan. Multiple methods were employed to determine if intrinsic triclosan resistance reflected resistance to hydrophobic molecules by virtue of outer membrane impermeability. While all but one organism isolated in the absence of triclosan were able to initiate growth on MacConkey agar, only one was able to initiate significant growth with triclosan present. In contrast, all bacteria selected with triclosan were identified as Pseudomonas spp. using 16S RNA gene sequencing and exhibited growth comparable to Pseudomonas aeruginosa controls in the presence of hydrophobic antibacterial agents to include triclosan. Two representative bacteria isolated in the absence of triclosan allowed for greater outer membrane association with the fluorescent hydrophobic probe 1-N-phenylnapthylamine than did two triclosan-resistant isolates. Compound 48/80 disruption of outer membrane impermeability properties for hydrophobic substances either partially or fully sensitized nine of twelve intrinsically resistant isolates to triclosan. These data suggest that outer membrane exclusion underlies intrinsic resistance to triclosan in some, but not all Pseudomonas spp. isolated by selection from municipal surface waters and implicates the involvement of concomitant triclosan resistance mechanisms.
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Affiliation(s)
- Lauren E Chambers
- Department of Biochemistry and Microbiology, Oklahoma State University Center for Health Sciences, Tulsa, Oklahoma, USA
| | - Mang Chang
- Department of Biochemistry and Microbiology, Oklahoma State University Center for Health Sciences, Tulsa, Oklahoma, USA
| | - Kavya Boyina
- Department of Biochemistry and Microbiology, Oklahoma State University Center for Health Sciences, Tulsa, Oklahoma, USA
| | - Ashton Williams
- Department of Biochemistry and Microbiology, Oklahoma State University Center for Health Sciences, Tulsa, Oklahoma, USA
| | - Rebecca Dye
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma, USA
| | - Robert V Miller
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma, USA
| | - Michelle A DeGear
- Department of Biochemistry and Microbiology, Oklahoma State University Center for Health Sciences, Tulsa, Oklahoma, USA
| | - Senait Assefa
- Department of Biochemistry and Microbiology, Oklahoma State University Center for Health Sciences, Tulsa, Oklahoma, USA
| | - Gerwald A Köhler
- Department of Biochemistry and Microbiology, Oklahoma State University Center for Health Sciences, Tulsa, Oklahoma, USA
| | - Franklin R Champlin
- Department of Biochemistry and Microbiology, Oklahoma State University Center for Health Sciences, Tulsa, Oklahoma, USA
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Gray HK, Arora-Williams KK, Young C, Bouwer E, Davis MF, Preheim SP. Contribution of Time, Taxonomy, and Selective Antimicrobials to Antibiotic and Multidrug Resistance in Wastewater Bacteria. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:15946-15957. [PMID: 33258596 PMCID: PMC8463082 DOI: 10.1021/acs.est.0c03803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The use of nontherapeutic broad-spectrum antimicrobial agents triclosan (TCS) and benzalkonium chloride (BC) can contribute to bacterial resistance to clinically relevant antibiotics. Antimicrobial-resistant bacteria within wastewater may reflect the resistance burden within the human microbiome, as antibiotics and pathogens in wastewater can track with clinically relevant parameters during perturbations to the community. In this study, we monitored culturable and resistant wastewater bacteria and cross-resistance to clinically relevant antibiotics to gauge the impact of each antimicrobial and identify factors influencing cross-resistance profiles. Bacteria resistant to TCS and BC were isolated from wastewater influent over 21 months, and cross-resistance, taxonomy, and monthly changes were characterized under both antimicrobial selection regimes. Cross-resistance profiles from each antimicrobial differed within and between taxa. BC-isolated bacteria had a significantly higher prevalence of resistance to "last-resort antibiotic" colistin, while isolates resistant to TCS exhibited higher rates of multidrug resistance. Prevalence of culturable TCS-resistant bacteria decreased over time following Food and Drug Administration (FDA) TCS bans. Cross-resistance patterns varied according to sampling date, including among the most clinically important antibiotics. Correlations between strain-specific resistance profiles were largely influenced by taxonomy, with some variations associated with sampling date. The results reveal that time, taxonomy, and selection by TCS and BC impact features of cross-resistance patterns among diverse wastewater microorganisms, which could reflect the variety of factors influencing resistance patterns relevant to a community microbiome.
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Affiliation(s)
- Hannah K Gray
- Department of Environmental Health and Engineering, Whiting School of Engineering, Johns Hopkins University, 3400 North Charles Street, 313 Ames Hall, Baltimore, Maryland 21218, United States
| | - Keith K Arora-Williams
- Department of Environmental Health and Engineering, Whiting School of Engineering, Johns Hopkins University, 3400 North Charles Street, 313 Ames Hall, Baltimore, Maryland 21218, United States
| | - Charles Young
- The Johns Hopkins Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, Maryland 20723, United States
| | - Edward Bouwer
- Department of Environmental Health and Engineering, Whiting School of Engineering, Johns Hopkins University, 3400 North Charles Street, 313 Ames Hall, Baltimore, Maryland 21218, United States
| | - Meghan F Davis
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, 615 North Wolfe Street, E7612, Baltimore, Maryland 21205, United States
| | - Sarah P Preheim
- Department of Environmental Health and Engineering, Whiting School of Engineering, Johns Hopkins University, 3400 North Charles Street, 313 Ames Hall, Baltimore, Maryland 21218, United States
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Abstract
This paper offers a general view of the solutions that are able to confer bioactivity to the packaging materials, especially antimicrobial and antioxidant activity. These properties can be induced by the nature of the polymers blend or due to the addition of ternary components from natural agents (essential oils or other extracts) to synthetic organic and inorganic agents, including nanoparticles with a broad antimicrobial activity such as metals (e.g., Ag, Au, Cu) or metal oxide (e.g., TiO2, ZnO) nanoparticles, and even bacterial cells such as probiotics. Many times, these components are synergistically used, each of them assuring a specific role or potentiating the role of the other components. The antimicrobial activity can be induced due to the applied coatings or due to the whole bulk material. Along with an increasing food stability which means a longer shelf-life some smart packaging can be exploited in order to highlight the freshness of the food. These act as a sensor (usually pH sensitive but also other mechanisms can be exploited such as aggregation/agglomeration of AuNPs leading to color change or even aldehyde-specific reactions such as the Cannizzaro reaction), and thus, consumers can be confident about the freshness of the food, especially perishable food such as seafood or fish.
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Yu K, Zhang Y, Xu W, Zhang X, Xu Y, Sun Y, Zhou T, Cao J. Hyper-expression of the efflux pump gene adeB was found in Acinetobacter baumannii with decreased triclosan susceptibility. J Glob Antimicrob Resist 2020; 22:367-373. [PMID: 32165286 DOI: 10.1016/j.jgar.2020.02.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 02/17/2020] [Accepted: 02/19/2020] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVES Triclosan is usually employed as a disinfectant in a wide range of medical and consumer care products, which may have imposed a selective pressure on bacteria. This study was designed to evaluate the resistance mechanisms of triclosan and molecular epidemiology of triclosan-resistant isolates of Acinetobacter baumannii in Wenzhou, China. METHODS A collection of 626 A. baumannii were isolated from the First Affiliated Hospital of Wenzhou Medical University during 2016-2017 and antimicrobial susceptibility testing of these isolates were performed via agar dilution method. Molecular mechanisms of triclosan resistance, including the existence of mutations in reductase (FabI) were investigated by PCR and sequencing. Furthermore, quantitative RT-PCR was conducted to evaluate the expression levels of the fabI gene and efflux pump genes (adeB, adeG, adeJ, abeM, amvA and abeS) at normal condition and sub-inhibitory concentration of triclosan, and the epidemiological characteristics were analyzed by PFGE and MLST. RESULTS 2.7% (17/626) of A. baumannii exhibited resistance to triclosan. The FabI mutation Gly95Ser was found in one triclosan resistant strain. The expression of fabI and adeB gene were significant difference between triclosan-resistant and susceptible strains (P < 0.05). The expression of fabI, adeG, adeJ and abeM were increased after triclosan induction. The clones of these resistant isolates were diverse and sporadic. CONCLUSIONS The hyper-expression of fabI was probably the main mechanism of triclosan resistance in this study, and the efflux pump AdeB, AdeG, AdeJ and AbeM might also be related to decreased triclosan susceptibility.
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Affiliation(s)
- Kaihang Yu
- School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Yizhi Zhang
- Depatment of Clinical Laboratory, Ningbo Women and Children's Hospital, Ningbo, Zhejiang province, China
| | - Wenya Xu
- Depatment of Clinical Laboratory, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang province, China
| | - Xiucai Zhang
- Depatment of Clinical Laboratory, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang province, China
| | - Ye Xu
- Depatment of Clinical Laboratory, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang province, China
| | - Yao Sun
- Depatment of Clinical Laboratory, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang province, China
| | - Tieli Zhou
- Depatment of Clinical Laboratory, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang province, China.
| | - Jianming Cao
- School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang Province, China.
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Samet M, Karray F, Mhiri N, Kamoun L, Sayadi S, Gargouri-Bouzid R. Effect of phosphogypsum addition in the composting process on the physico-chemical proprieties and the microbial diversity of the resulting compost tea. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:21404-21415. [PMID: 31124074 DOI: 10.1007/s11356-019-05327-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
Phosphoric acid production and olive oil production are among the most important economical sectors in Tunisia. However, they generate huge amounts of wastes (phosphogypsum, olive mill waste water, and olive pomace). In a previous study, we used phosphogypsum (PG), in co-composting with organic wastes. Three composts were produced; their PG content was of 0 (AT), 10 (A10), and 30% (A30). In the present study, we focused on their derived compost teas. The physico-chemical characterization of the different compost teas showed that those from A10 and A30 composts presented higher P and Ca contents than that from control one (AT). The microbial characterization using DGGE showed a noticeable microbial diversity in the different compost teas and that the addition of 10% and 30% PG in the compost had different effects on the compost tea microbial diversity. The identification results showed that the addition of 10 and 30% of PG did not affect the presence of PGPR (plant growth-promoting rhizobacteria) and fungal soil antagonists in the compost teas. Two PGPRs were isolated from AT and A30 compost teas, and their effect on the growth of potato plants in vitro was evaluated.
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Affiliation(s)
- Mariem Samet
- Laboratoire d'Amélioration des Plantes et Valorisation des Agro-ressources, Ecole Nationale d'Ingénieurs de Sfax, Route Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia.
| | - Fatma Karray
- Laboratoire des Bioprocédés Environnementaux, Centre de Biotechnologie de Sfax, Route Sidi Mansour, km 6, BP 1177, 3018, Sfax, Tunisia
| | - Najla Mhiri
- Laboratoire des Bioprocédés Environnementaux, Centre de Biotechnologie de Sfax, Route Sidi Mansour, km 6, BP 1177, 3018, Sfax, Tunisia
| | - Lotfi Kamoun
- Groupe Chimique Tunisien, Direction de la Recherche Scientifique, Route de Gabes km 3,5, 3000, Sfax, Tunisia
| | - Sami Sayadi
- Laboratoire des Bioprocédés Environnementaux, Centre de Biotechnologie de Sfax, Route Sidi Mansour, km 6, BP 1177, 3018, Sfax, Tunisia
| | - Radhia Gargouri-Bouzid
- Laboratoire d'Amélioration des Plantes et Valorisation des Agro-ressources, Ecole Nationale d'Ingénieurs de Sfax, Route Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia
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Carey DE, McNamara PJ. The impact of triclosan on the spread of antibiotic resistance in the environment. Front Microbiol 2015; 5:780. [PMID: 25642217 PMCID: PMC4295542 DOI: 10.3389/fmicb.2014.00780] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Accepted: 12/19/2014] [Indexed: 12/22/2022] Open
Abstract
Triclosan (TCS) is a commonly used antimicrobial agent that enters wastewater treatment plants (WWTPs) and the environment. An estimated 1.1 × 10(5) to 4.2 × 10(5) kg of TCS are discharged from these WWTPs per year in the United States. The abundance of TCS along with its antimicrobial properties have given rise to concern regarding its impact on antibiotic resistance in the environment. The objective of this review is to assess the state of knowledge regarding the impact of TCS on multidrug resistance in environmental settings, including engineered environments such as anaerobic digesters. Pure culture studies are reviewed in this paper to gain insight into the substantially smaller body of research surrounding the impacts of TCS on environmental microbial communities. Pure culture studies, mainly on pathogenic strains of bacteria, demonstrate that TCS is often associated with multidrug resistance. Research is lacking to quantify the current impacts of TCS discharge to the environment, but it is known that resistance to TCS and multidrug resistance can increase in environmental microbial communities exposed to TCS. Research plans are proposed to quantitatively define the conditions under which TCS selects for multidrug resistance in the environment.
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Affiliation(s)
| | - Patrick J. McNamara
- Department of Civil, Construction and Environmental Engineering, Marquette University, Milwaukee, WI, USA
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12
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Histological study of adult male rat seminiferous tubules following triclosan administration and the possible protective role of pomegranate juice. ACTA ACUST UNITED AC 2014. [DOI: 10.1097/01.ehx.0000446590.49937.e9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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