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Thakur P, Gopalakrishnan V, Saxena P, Subramaniam M, Goh KM, Peyton B, Fields M, Sani RK. Influence of Copper on Oleidesulfovibrio alaskensis G20 Biofilm Formation. Microorganisms 2024; 12:1747. [PMID: 39338422 PMCID: PMC11434458 DOI: 10.3390/microorganisms12091747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2024] [Revised: 08/19/2024] [Accepted: 08/20/2024] [Indexed: 09/30/2024] Open
Abstract
Copper is known to have toxic effects on bacterial growth. This study aimed to determine the influence of copper ions on Oleidesulfovibrio alaskensis G20 biofilm formation in a lactate-C medium supplemented with variable copper ion concentrations. OA G20, when grown in media supplemented with high copper ion concentrations of 5, 15, and 30 µM, exhibited inhibited growth in its planktonic state. Conversely, under similar copper concentrations, OA G20 demonstrated enhanced biofilm formation on glass coupons. Microscopic studies revealed that biofilms exposed to copper stress demonstrated a change in cellular morphology and more accumulation of carbohydrates and proteins than controls. Consistent with these findings, sulfur (dsrA, dsrB, sat, aprA) and electron transport (NiFeSe, NiFe, ldh, cyt3) genes, polysaccharide synthesis (poI), and genes involved in stress response (sodB) were significantly upregulated in copper-induced biofilms, while genes (ftsZ, ftsA, ftsQ) related to cellular division were negatively regulated compared to controls. These results indicate that the presence of copper ions triggers alterations in cellular morphology and gene expression levels in OA G20, impacting cell attachment and EPS production. This adaptation, characterized by increased biofilm formation, represents a crucial strategy employed by OA G20 to resist metal ion stress.
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Affiliation(s)
- Payal Thakur
- Department of Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- 2-Dimensional Materials for Biofilm Engineering, Science and Technology, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- Data Driven Material Discovery Center for Bioengineering Innovation, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
| | - Vinoj Gopalakrishnan
- Department of Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- 2-Dimensional Materials for Biofilm Engineering, Science and Technology, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- Data Driven Material Discovery Center for Bioengineering Innovation, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
| | - Priya Saxena
- Department of Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- 2-Dimensional Materials for Biofilm Engineering, Science and Technology, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- Data Driven Material Discovery Center for Bioengineering Innovation, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
| | | | - Kian Mau Goh
- Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| | - Brent Peyton
- Department of Chemical and Biological Engineering, Montana State University, Bozeman, MT 59717, USA
| | - Matthew Fields
- Department of Chemical and Biological Engineering, Montana State University, Bozeman, MT 59717, USA
| | - Rajesh Kumar Sani
- Department of Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- 2-Dimensional Materials for Biofilm Engineering, Science and Technology, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- Data Driven Material Discovery Center for Bioengineering Innovation, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- BuG ReMeDEE Consortium, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- Composite and Nanocomposite Advanced Manufacturing Centre-Biomaterials, Rapid City, SD 57701, USA
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Ulusoy S, Basturk FB, Turkaydın D, Garip Berker Y, Gunday M, Durmazpınar PM. Cutting efficiency and corrosion resistance of heat-treated endodontic files after various disinfection protocols. Odontology 2024; 112:847-854. [PMID: 38381265 DOI: 10.1007/s10266-023-00896-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 12/27/2023] [Indexed: 02/22/2024]
Abstract
The aim of this study is to evaluate the effect of various disinfection protocols on the cutting efficiency and chemical composition of ProTaper, Twisted File, Twisted File Adaptive, and Hedström files. Four experimental groups (n = 10) were presoaked in either enzymatic solution or 1% sodium hypochlorite for 30 min, followed by either 5 or 15 min of ultrasonic cleaning and then autoclaved. Resin-simulated canals with a single curvature of 38-40° were prepared by each instrument system. Cutting efficiency of each instrument was analyzed by subtracting the final weight from the initial weight of the resin blocks. Chemical compositions were studied by field emission scanning electron microscopy and X-ray energy-dispersive spectrometry. The cutting efficiency of Hedström, ProTaper, and Twisted File instruments decreased compared to their control groups (p < 0.05) whereas it did not change for Twisted File Adaptive. More corrosion was detected with longer ultrasonication time. No difference was observed regarding the pre-soaking media. Disinfection protocols exerted a significant overall effect on the performance of Hedström, ProTaper, and Twisted File instruments. Corrosion, microcracks, and crevices were evident on all tested instruments after disinfection protocols applied. All disinfection protocols, regardless of the pre-soaking media used or the ultrasonic cleaning time applied, have some effect on the cutting efficiency and the surface characteristics of the files.
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Affiliation(s)
- Seyma Ulusoy
- Department of Endodontics, Faculty of Dentistry, Marmara University, Başıbüyük Yolu Marmara Üniversitesi Başıbüyük Sağlık Yerleşkesi 9/3, Başıbüyük, Maltepe, P.O. Box: 34854, Istanbul, Turkey
| | - Fatima Betül Basturk
- Department of Endodontics, Faculty of Dentistry, Istanbul Gelisim University, Prof. Dr. Cavit Orhan Tütengil Sk. No: 4, Fatih, Süleymaniye, Istanbul, 34116, Turkey
| | - Dilek Turkaydın
- Department of Endodontics, Faculty of Dentistry, Marmara University, Başıbüyük Yolu Marmara Üniversitesi Başıbüyük Sağlık Yerleşkesi 9/3, Başıbüyük, Maltepe, P.O. Box: 34854, Istanbul, Turkey
| | - Yıldız Garip Berker
- Department of Endodontics, Faculty of Dentistry, Istanbul Biruni University, Kazlıçeşme, Cinoğlu Çk. No:2, Zeytinburnu, Istanbul, 34020, Turkey
| | - Mahir Gunday
- Department of Endodontics, Faculty of Dentistry, Istanbul Gelisim University, Prof. Dr. Cavit Orhan Tütengil Sk. No: 4, Fatih, Süleymaniye, Istanbul, 34116, Turkey
| | - Parla Meva Durmazpınar
- Department of Endodontics, Faculty of Dentistry, Marmara University, Başıbüyük Yolu Marmara Üniversitesi Başıbüyük Sağlık Yerleşkesi 9/3, Başıbüyük, Maltepe, P.O. Box: 34854, Istanbul, Turkey.
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Kurniawan J, Waturangi DE, Julyantoro PGS, Papuangan N. Ice nucleation active bacteria metabolites as antibiofilm agent to control Aeromonas hydrophila and Streptococcus agalactiae infections in Aquaculture. BMC Res Notes 2024; 17:166. [PMID: 38886828 PMCID: PMC11184859 DOI: 10.1186/s13104-024-06821-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 06/05/2024] [Indexed: 06/20/2024] Open
Abstract
OBJECTIVES The aim of this study was to quantify and identify metabolites of Ice Nucleation Active (INA) bacteria as an anti-biofilm agent against biofilms of fish pathogens such as Aeromonas hydrophila and Streptococcus agalactiae. RESULTS Ice nucleation active bacteria, which have the ability to catalyze ice nucleation, isolated from rainwater in previous studies, were used. All INA isolates were tested in several assays, including the antimicrobial test, which uses streptomycin as the positive control and none of the isolates were found positive in the antimicrobial test. As for the quorum quenching assay, it was found that four out of ten isolates were able to disturb the communication system in Chromobacterium violaceum wild type, which was used as the indicator bacteria. On the next assay, all ten isolates were tested for Biofilm Inhibition and Destruction and showed anti-biofilm activity with the highest percentage inhibition of 33.49% by isolate A40 against A. hydrophila and 77.26% by isolate A19 against S. agalactiae. C1 performed the highest destruction against A. hydrophila and S. agalactiae, with percentages of 32.11% and 51.88%, respectively. As for the GC-MS analysis, supernatants of INA bacteria contain bioactive compounds such as sarcosine and fatty acids, which are known to have antibiofilm activity against several biofilm-forming bacteria. Through 16s rRNA sequencing, identified bacteria are from the Pantoea, Enterobacter, and Acinetobacter genera. As for the conclusion, ice nucleation active bacteria metabolites tested showed positive results against pathogenic bacteria Aeromonas hydrophila and Streptococcus agalactiae in destructing and inhibiting biofilm growth.
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Affiliation(s)
- Jessica Kurniawan
- Department of Biotechnology, Faculty of Biotechnology, Atma Jaya Catholic University of Indonesia, Jalan Jenderal Sudirman 51, Jakarta, 12930, Indonesia
| | - Diana Elizabeth Waturangi
- Department of Biotechnology, Faculty of Biotechnology, Atma Jaya Catholic University of Indonesia, Jalan Jenderal Sudirman 51, Jakarta, 12930, Indonesia.
| | - Pande Gde Sasmita Julyantoro
- Department of Aquatic Resources Management, Faculty of Marine Science and Fisheries, University of Udayana, Denpasar, Bali, 80361, Indonesia
| | - Nurmaya Papuangan
- Department of Biology Education, Faculty of Teacher Training and Education, Khairun University, Ternate, 97728, Indonesia
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Lukman G, Waturangi DE, Julyantoro PGS, Papuangan N. Phyllosphere bacteria with antiquorum sensing and antibiofilm activities against fish pathogenic bacteria. BMC Res Notes 2024; 17:5. [PMID: 38167225 PMCID: PMC10759618 DOI: 10.1186/s13104-023-06657-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 12/07/2023] [Indexed: 01/05/2024] Open
Abstract
OBJECTIVE This research aims to quantify antiquorum sensing and antibiofilm activity of f phyllosphere bacteria against biofilm formed by pathogenic fish bacteria such as Aeromonas hydrophila, Streptococcus agalactiae, and Vibrio harveyi. RESULTS Antiquorum sensing assay using Chromobacter violaceum as indicator bacteria and antibiofilm assay showed six phyllosphere bacteria have antiquorum sensing and antibiofilm activities against tested bacteria. The highest inhibition and destruction activity was showed by metabolite of JB 3B and EJB 5 F against A. hydrophila, respectively. Determination using light microscope and scanning electron microscope performed decreaing in biomass of biofilm observed after treated with metabolite from phyllosphere bacteria.
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Affiliation(s)
- Griselda Lukman
- Department of Biotechnology, Faculty of Biotechnology, Atma Jaya Catholic University of Indonesia, Jalan Jenderal Sudirman 51, Jakarta, 12930, Indonesia
| | - Diana Elizabeth Waturangi
- Department of Biotechnology, Faculty of Biotechnology, Atma Jaya Catholic University of Indonesia, Jalan Jenderal Sudirman 51, Jakarta, 12930, Indonesia.
| | - Pande Gde Sasmita Julyantoro
- Department of Aquatic Resources Management, Faculty of Marine Science and Fisheries, University of Udayana, Denpasar, Bali, 80361, Indonesia
| | - Nurmaya Papuangan
- Department of Biology Education, Faculty of Teacher Training and Education, Khairun University, Ternate, 97728, Indonesia
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Thakur P, Alaba MO, Rauniyar S, Singh RN, Saxena P, Bomgni A, Gnimpieba EZ, Lushbough C, Goh KM, Sani RK. Text-Mining to Identify Gene Sets Involved in Biocorrosion by Sulfate-Reducing Bacteria: A Semi-Automated Workflow. Microorganisms 2023; 11:119. [PMID: 36677411 PMCID: PMC9867429 DOI: 10.3390/microorganisms11010119] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/12/2022] [Accepted: 12/14/2022] [Indexed: 01/05/2023] Open
Abstract
A significant amount of literature is available on biocorrosion, which makes manual extraction of crucial information such as genes and proteins a laborious task. Despite the fast growth of biology related corrosion studies, there is a limited number of gene collections relating to the corrosion process (biocorrosion). Text mining offers a potential solution by automatically extracting the essential information from unstructured text. We present a text mining workflow that extracts biocorrosion associated genes/proteins in sulfate-reducing bacteria (SRB) from literature databases (e.g., PubMed and PMC). This semi-automatic workflow is built with the Named Entity Recognition (NER) method and Convolutional Neural Network (CNN) model. With PubMed and PMCID as inputs, the workflow identified 227 genes belonging to several Desulfovibrio species. To validate their functions, Gene Ontology (GO) enrichment and biological network analysis was performed using UniprotKB and STRING-DB, respectively. The GO analysis showed that metal ion binding, sulfur binding, and electron transport were among the principal molecular functions. Furthermore, the biological network analysis generated three interlinked clusters containing genes involved in metal ion binding, cellular respiration, and electron transfer, which suggests the involvement of the extracted gene set in biocorrosion. Finally, the dataset was validated through manual curation, yielding a similar set of genes as our workflow; among these, hysB and hydA, and sat and dsrB were identified as the metal ion binding and sulfur metabolism genes, respectively. The identified genes were mapped with the pangenome of 63 SRB genomes that yielded the distribution of these genes across 63 SRB based on the amino acid sequence similarity and were further categorized as core and accessory gene families. SRB's role in biocorrosion involves the transfer of electrons from the metal surface via a hydrogen medium to the sulfate reduction pathway. Therefore, genes encoding hydrogenases and cytochromes might be participating in removing hydrogen from the metals through electron transfer. Moreover, the production of corrosive sulfide from the sulfur metabolism indirectly contributes to the localized pitting of the metals. After the corroboration of text mining results with SRB biocorrosion mechanisms, we suggest that the text mining framework could be utilized for genes/proteins extraction and significantly reduce the manual curation time.
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Affiliation(s)
- Payal Thakur
- Department of Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- Data Driven Material Discovery Center for Bioengineering Innovation, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
| | - Mathew O. Alaba
- Department of Biomedical Engineering, University of South Dakota, Sioux Falls, SD 57069, USA
| | - Shailabh Rauniyar
- Department of Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- 2-Dimensional Materials for Biofilm Engineering, Science and Technology, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
| | - Ram Nageena Singh
- Department of Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- 2-Dimensional Materials for Biofilm Engineering, Science and Technology, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
| | - Priya Saxena
- Department of Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- Data Driven Material Discovery Center for Bioengineering Innovation, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
| | - Alain Bomgni
- Department of Biomedical Engineering, University of South Dakota, Sioux Falls, SD 57069, USA
| | - Etienne Z. Gnimpieba
- Data Driven Material Discovery Center for Bioengineering Innovation, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- Department of Biomedical Engineering, University of South Dakota, Sioux Falls, SD 57069, USA
- 2-Dimensional Materials for Biofilm Engineering, Science and Technology, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
| | - Carol Lushbough
- Department of Biomedical Engineering, University of South Dakota, Sioux Falls, SD 57069, USA
| | - Kian Mau Goh
- Faculty of Science, Universiti Teknologi Malaysia, Skudai 81310, Johor, Malaysia
| | - Rajesh Kumar Sani
- Department of Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- Data Driven Material Discovery Center for Bioengineering Innovation, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- 2-Dimensional Materials for Biofilm Engineering, Science and Technology, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- BuG ReMeDEE Consortium, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA
- Composite and Nanocomposite Advanced Manufacturing Centre—Biomaterials, Rapid City, SD 57701, USA
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Gopalakrishnan U, Thiagarajan K, Felicita AS, Gosh P, Alshehri A, Awadh W, Alzahrani KJ, Alzahrani FM, Alsharif KF, Halawani IF, Alshammeri S, Alamoudi A, Albar DH, Baeshen HA, Patil S. In-Vitro Assessment of the Corrosion Potential of an Oral Strain of Sulfate-Reducing Bacteria on Metallic Orthodontic Materials. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:15312. [PMID: 36430029 PMCID: PMC9690961 DOI: 10.3390/ijerph192215312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/13/2022] [Accepted: 11/17/2022] [Indexed: 06/16/2023]
Abstract
AIM Orthodontic literature is scant when it comes to microbial corrosion. The oral prevalence of many bacteria which are capable of causing microbial corrosion is reported in the dental literature. The aim of this study is to experimentally determine the corrosive potential of an oral strain of Sulfate-reducing bacteria. MATERIALS AND METHODS Stainless steel (SS) bracket, stainless steel archwire, NiTi archwire, Titanium molybdenum (TMA) archwire, and titanium miniscrew were immersed in five media which included Artificial saliva (group I), Sulfate rich artificial saliva (group II), API agar medium specific for SRB (group III), AS + API medium+ bacterial strain (group IV), SRAS+ API medium+ bacterial strain (group V). The materials were then subjected to Scanning electron microscopy and energy-dispersive X-ray analysis (EDX). RESULTS Materials in groups I, II, and III did not show any surface changes whereas materials in groups IV and V which contained the bacteria showed surface changes which were erosive patches suggestive of corrosion. EDX analyses were in line with similar findings. CONCLUSION This in vitro study suggested that the oral strain of Sulfate-reducing bacteria was able to induce corrosive changes in the experimental setup.
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Affiliation(s)
- Umarevathi Gopalakrishnan
- Department of Orthodontics, Sri Venkateswara Dental College and Hospital, Thalambur, Chennai 600130, India
| | - Kavitha Thiagarajan
- Department of Dental Surgery, Government Stanley Medical College and Hospital, Chennai 600001, India
| | - A. Sumathi Felicita
- Department of Orthodontics, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Chennai 600077, India
| | - Pallabhi Gosh
- Biomedical Engineer, Saveetha Dental College and Hospital, Chennai 600077, India
| | - Abdulrahman Alshehri
- Division of Orthodontics, Department of Preventive Dental Sciences, Faculty of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| | - Wael Awadh
- Division of Orthodontics, Department of Preventive Dental Sciences, Faculty of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| | - Khalid J. Alzahrani
- Department of Clinical Laboratories Sciences, College of Applied Medical Sciences, Taif University, Taif 21944, Saudi Arabia
| | - Fuad M. Alzahrani
- Department of Clinical Laboratories Sciences, College of Applied Medical Sciences, Taif University, Taif 21944, Saudi Arabia
| | - Khalaf F. Alsharif
- Department of Clinical Laboratories Sciences, College of Applied Medical Sciences, Taif University, Taif 21944, Saudi Arabia
| | - Ibrahim F. Halawani
- Department of Clinical Laboratories Sciences, College of Applied Medical Sciences, Taif University, Taif 21944, Saudi Arabia
| | - Saleh Alshammeri
- Department of Optometry, College of Applied Medical Sciences, Qassim University, Buraydah 1162, Saudi Arabia
| | - Ahmed Alamoudi
- Oral Biology Department, Faculty of Dentistry, King Abdulaziz University, Jeddah 22254, Saudi Arabia
| | - Dhalia H. Albar
- Department of Preventive Dental Sciences, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| | - Hosam Ali Baeshen
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Shankargouda Patil
- College of Dental Medicine, Roseman University of Health Sciences, South Jordan, UT 84095, USA
- Centre of Molecular Medicine and Diagnostics (COMManD), Saveetha Dental College & Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai 600077, India
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Gopalakrishnan U, R S, Felicita S, K M, Selvaraj V. Bibliometric analysis on microbial corrosion in dentistry. INTERNATIONAL JOURNAL OF ORTHODONTIC REHABILITATION 2022. [DOI: 10.56501/intjorthodrehabil.v13i3.482] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
Aim: The present bibliometric analysis was conducted to find the evidence regarding microbial corrosion in dentistry since corrosion by whatever means affect the intraoral performance of the metallic appliances.
Materials and methods:
Material and methods: Dimensions software was used to search for published literature pertaining to the keywords “microbial corrosion” AND “dentistry”. Two reviewers assessed the articles in terms of year of publication, authors, country of origin, journal of publication, and the affiliated institutions of the authors as well as their collaborations and the most cited publications.
Results: The search revealed a total of 3,118 articles between the years 2000 to 2022. The number of publications was on the rising pattern with a spike between 2004-2007, again with a small spike between 2014 and 2016 and then a steep increase from 2017 onwards. The publications were almost equally split between Engineering science and Medical Sciences. United States topped the list of countries with 378 documents with total link strength of 106224. Sao Paulo University topped the list in terms of organizations with total link strength of 12722. The journal of Anatomia Histologia Embryologia topped with 136 publications followed by Materials with 94 publications. Valentim from Brazil topped the authors with 22 publications.
Conclusion:
Microbial corrosion is needs equal concentration as any other forms of intraoral corrosion given that oral cavity is loaded with huge varieties of microorganisms with some of them known to cause microbial corrosion like sulfate reducing bacteria. The recent decline in research and publications in this field especially in 2022 is concerning. More studies are needed to learn more on microbial corrosion and its effects in dentistry.
Keywords: microbial corrosion, dentistry, sulfate reducing bacteria
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Detection of Sulfate-Reducing Bacteria as an Indicator for Successful Mitigation of Sulfide Production. Appl Environ Microbiol 2021; 87:e0174821. [PMID: 34550760 PMCID: PMC8579970 DOI: 10.1128/aem.01748-21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Sulfate-reducing bacteria (SRBs) are one of the main sources of biogenic H2S generation in oil reservoirs. Excess H2S production in these systems leads to oil biosouring, which causes operational risks and health hazards and can increase the cost of refining crude oil. Nitrate salts are often added to the system to suppress sulfidogenesis. Because SRB populations can persist in biofilms even after nitrate treatment, identifying shifts in the sessile community is crucial for successful mitigation. However, sampling the sessile community is hampered by its inaccessibility. Here, we use the results of a long-term (148 days) ex situ experiment to identify particular sessile community members from observations of the sample waste stream. Microbial community structure was determined for 731 samples across 20 bioreactors using 16S rRNA gene sequencing. By associating microbial community structure with specific steps in the mitigation process, we could distinguish between taxa associated with H2S production and mitigation. After initiation of nitrate treatment, certain SRB populations increased in the planktonic community during critical time points, indicating the dissociation of SRBs from the biofilm. Predicted relative abundances of the dissimilatory sulfate reduction pathway also increased during the critical time points. Here, by analyzing the planktonic community structure, we describe a general method that uses high-throughput amplicon sequencing, metabolic inferences, and cell abundance data to identify successful biofilm mitigation. We anticipate that our approach is also applicable to other systems where biofilms must be mitigated but cannot be sampled easily. IMPORTANCE Microbial biofilms are commonly present in many industrial processes and can negatively impact performance and safety. Within the oil industry, subterranean biofilms cause biosouring with implications for oil quality, cost, occupational health, and the environment. Because these biofilms cannot be sampled directly, methods are needed to indirectly assess the success of mitigation measures. This study demonstrates how the planktonic microbial community can be used to assess the dissociation of sulfate-reducing bacterium (SRB)-containing biofilms. We found that an increase in the abundance of a specific SRB population in the effluent after nitrate treatment can be used as a potential indicator for the successful mitigation of biofilm-forming SRBs. Moreover, a method for determining critical time points for detecting potential indicators is suggested. This study expands our knowledge of improving mitigation strategies for biosouring and could have broader implications in other systems where biofilms lead to adverse consequences.
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Giorgi-Pérez AM, Arboleda-Ordoñez AM, Villamizar-Suárez W, Cardeñosa-Mendoza M, Jaimes-Prada R, Rincón-Orozco B, Niño-Gómez ME. Biofilm formation and its effects on microbiologically influenced corrosion of carbon steel in oilfield injection water via electrochemical techniques and scanning electron microscopy. Bioelectrochemistry 2021; 141:107868. [PMID: 34126368 DOI: 10.1016/j.bioelechem.2021.107868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 05/26/2021] [Accepted: 05/28/2021] [Indexed: 10/21/2022]
Abstract
In this study, changes in the electrochemical conditions of oil fields caused by biofilms with sulfate-reducing bacteria have been studied as they promote localized pitting damage, reservoir souring problems, and many other processes including well plugging that lead to increased production costs. Biofilm formation and its effects on 1020 carbon steel surfaces were evaluated in a discontinuous electrochemical reactor by using a bacterial consortium isolated from the injection water of a Colombian oil field. Sulfide concentration and pH values were observed to decrease, which was consistent with the exponential planktonic sulfate-reducing bacterial growth. The formation of a biofilm that adheres to a porous layer of corrosion products was identified using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The morphology of the films revealed the presence of the biofilm and corrosion product crystals. Open circuit potential presented a negative shift in the potential during the first 24 h in a biotic cell. Electrochemical impedance spectroscopy showed a change in the behavior of the resistive zone for both systems, a charge transfer trend in the abiotic cell, and a transformation of the charge transfer process to a diffusive process in the biotic cell after 48 h. The polarization resistance showed its lowest resistivity 74.95 Ω·cm-2 during the first 48 h, while the corrosion rate was estimated as 3.37 mpy. This research contributes to the understanding of corrosion mechanisms in the metal-solution interface via detailed monitoring of biofilm growth.
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Affiliation(s)
- Angélica M Giorgi-Pérez
- Centro de Investigaciones en Catálisis CICAT, Universidad Industrial de Santander, Sede Guatiguará Km. 2 Vía El Refugio, Piedecuesta Santander, Colombia; Grupo de Investigaciones en Minerales, Biohidrometalurgia y Ambiente GIMBA, Universidad Industrial de Santander, Sede Guatiguará Km. 2 Vía El Refugio, Piedecuesta Santander, Colombia
| | - Ana M Arboleda-Ordoñez
- Grupo de Investigaciones en Minerales, Biohidrometalurgia y Ambiente GIMBA, Universidad Industrial de Santander, Sede Guatiguará Km. 2 Vía El Refugio, Piedecuesta Santander, Colombia; Grupo de Investigación en Compuestos Orgánicos de Interés Medicinal CODEIM, Universidad Industrial de Santander, Colombia
| | | | | | - Ronald Jaimes-Prada
- Instituto Colombiano del Petróleo ICP, Vía Piedecuesta Km 7, Piedecuesta Santander, Colombia
| | - Bladimiro Rincón-Orozco
- Grupo de Investigación en Compuestos Orgánicos de Interés Medicinal CODEIM, Universidad Industrial de Santander, Colombia; Grupo de Investigación en Bioquímica y Microbiología GIBIM, Universidad Industrial de Santander, Colombia
| | - Martha Eugenia Niño-Gómez
- Centro de Investigaciones en Catálisis CICAT, Universidad Industrial de Santander, Sede Guatiguará Km. 2 Vía El Refugio, Piedecuesta Santander, Colombia.
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Gagliano MC, Sudmalis D, Pei R, Temmink H, Plugge CM. Microbial Community Drivers in Anaerobic Granulation at High Salinity. Front Microbiol 2020; 11:235. [PMID: 32174895 PMCID: PMC7054345 DOI: 10.3389/fmicb.2020.00235] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 01/31/2020] [Indexed: 01/24/2023] Open
Abstract
In the recent years anaerobic sludge granulation at elevated salinities in upflow anaerobic sludge blanket (UASB) reactors has been investigated in few engineering based studies, never addressing the microbial community structural role in driving aggregation and keeping granules stability. In this study, the combination of different techniques was applied in order to follow the microbial community members and their structural dynamics in granules formed at low (5 g/L Na+) and high (20 g/L Na+) salinity conditions. Experiments were carried out in four UASB reactors fed with synthetic wastewater, using two experimental set-ups. By applying 16S rRNA gene analysis, the comparison of granules grown at low and high salinity showed that acetotrophic Methanosaeta harundinacea was the dominant methanogen at both salinities, while the dominant bacteria changed. At 5 g/L Na+, cocci chains of Streptoccoccus were developing, while at 20 g/L Na+ members of the family Defluviitaleaceae formed long filaments. By means of Fluorescence in Situ Hybridization (FISH) and Scanning Electron Microscopy (SEM), it was shown that aggregation of Methanosaeta in compact clusters and the formation of filaments of Streptoccoccus and Defluviitaleaceae during the digestion time were the main drivers for the granulation at low and high salinity. Interestingly, when the complex protein substrate (tryptone) in the synthetic wastewater was substituted with single amino acids (proline, leucine and glutamic acid), granules at high salinity (20 g/L Na+) were not formed. This corresponded to a decrease of Methanosaeta relative abundance and a lack of compact clustering, together with disappearance of Defluviitaleaceae and consequent absence of bacterial filaments within the dispersed biomass. In these conditions, a biofilm was growing on the glass wall of the reactor instead, highlighting that a complex protein substrate such as tryptone can contribute to granules formation at elevated salinity.
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Affiliation(s)
- Maria Cristina Gagliano
- Laboratory of Microbiology, Wageningen University & Research, Wageningen, Netherlands.,Wetsus - European Centre of Excellence for Sustainable Water Technology, Leeuwarden, Netherlands
| | - Dainis Sudmalis
- Department of Environmental Technology, Wageningen University & Research, Wageningen, Netherlands
| | - Ruizhe Pei
- Wetsus - European Centre of Excellence for Sustainable Water Technology, Leeuwarden, Netherlands
| | - Hardy Temmink
- Wetsus - European Centre of Excellence for Sustainable Water Technology, Leeuwarden, Netherlands.,Department of Environmental Technology, Wageningen University & Research, Wageningen, Netherlands
| | - Caroline M Plugge
- Laboratory of Microbiology, Wageningen University & Research, Wageningen, Netherlands.,Wetsus - European Centre of Excellence for Sustainable Water Technology, Leeuwarden, Netherlands
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