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Klopper KB, Bester E, van Schalkwyk M, Wolfaardt GM. Highlighting the limitations of static microplate biofilm assays for industrial biocide effectiveness compared to dynamic flow conditions. ENVIRONMENTAL MICROBIOLOGY REPORTS 2024; 16:e13214. [PMID: 38015101 PMCID: PMC10866068 DOI: 10.1111/1758-2229.13214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 11/01/2023] [Indexed: 11/29/2023]
Abstract
The minimal inhibitory concentration of an antimicrobial required to inhibit the growth of planktonic populations (minimum inhibitory concentration [MIC]) remains the 'gold standard' even though biofilms are acknowledged to be recalcitrant to concentrations that greatly exceed the MIC. As a result, most studies focus on biofilm tolerance to high antimicrobial concentrations, whereas the effect of environmentally relevant sub-MIC on biofilms is neglected. The effect of the MIC and sub-MIC of an isothiazolinone biocide on a microbial community isolated from an industrial cooling system was assessed under static and flow conditions. The differential response of planktonic and sessile populations to these biocide concentrations was discerned by modifying the broth microdilution assay. However, the end-point analysis of biofilms cultivated in static microplates obscured the effect of sub-MIC and MIC on biofilms. A transition from batch to the continuous flow system revealed a more nuanced response of biofilms to these biocide concentrations, where biofilm-derived planktonic cell production was maintained despite an increase in the frequency and extent of biofilm sloughing. A holistic, 'best of both worlds' approach that combines the use of static and continuous flow systems is useful to investigate the potential for the development of persistent biofilms under conditions where exposure to sub-MIC and MIC may occur.
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Affiliation(s)
- Kyle B. Klopper
- Department of MicrobiologyStellenbosch UniversityStellenboschSouth Africa
| | - Elanna Bester
- Department of MicrobiologyStellenbosch UniversityStellenboschSouth Africa
| | | | - Gideon M. Wolfaardt
- Department of MicrobiologyStellenbosch UniversityStellenboschSouth Africa
- Department of Chemistry and BiologyToronto Metropolitan UniversityTorontoOntarioCanada
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2
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Hong H, Deng A, Tang Y, Liu Z. How to identify biofouling species in marine and freshwater. BIOFOULING 2024; 40:130-152. [PMID: 38450626 DOI: 10.1080/08927014.2024.2324008] [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: 09/20/2023] [Accepted: 02/21/2024] [Indexed: 03/08/2024]
Abstract
The identification and management of biofouling remain pressing challenges in marine and freshwater ecosystems, with significant implications for environmental sustainability and industrial operations. This comprehensive review synthesizes the current state-of-the-art in biofouling identification technologies, examining eight prominent methodologies: Microscopy Examination, Molecular Biology, Remote Sensing, Community Involvement, Ecological Methods, Artificial Intelligence, Chemical Analysis, and Macro Photography. Each method is evaluated for its respective advantages and disadvantages, considering factors such as precision, scalability, cost, and data quality. Furthermore, the review identifies current obstacles that inhibit the optimal utilization of these technologies, ranging from technical limitations and high operational costs to issues of data inconsistency and subjectivity. Finally, the review posits a future outlook, advocating for the development of integrated, standardized systems that amalgamate the strengths of individual approaches. Such advancement will pave the way for more effective and sustainable strategies for biofouling identification and management.
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Affiliation(s)
- Heting Hong
- Hubei Meteorological Bureau, Wuhan Regional Climate Center, Wuhan, China
- School of Mechanical Engineering and Automation, Northeastern University, Shenyang, China
| | - Aijuan Deng
- Hubei Meteorological Bureau, Wuhan Regional Climate Center, Wuhan, China
| | - Yang Tang
- Hubei Meteorological Bureau, Wuhan Regional Climate Center, Wuhan, China
| | - Zhixiong Liu
- Hubei Meteorological Bureau, Wuhan Regional Climate Center, Wuhan, China
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Ferrer-Luque CM, Solana C, Aguado B, Baca P, Arias-Moliz MT, Ruiz-Linares M. Efficacy of mixed diclofenac solutions against root canal biofilms. AUST ENDOD J 2023; 49:530-536. [PMID: 37464569 DOI: 10.1111/aej.12776] [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: 12/19/2022] [Revised: 03/30/2023] [Accepted: 07/03/2023] [Indexed: 07/20/2023]
Abstract
The objective of this research was to evaluate the efficacy of diclofenac sodium solutions, with or without cetrimide (CTR) added, against polymicrobial root canal biofilms grown in dentin specimens. The study groups were: (1) 5% diclofenac sodium (DCS); (2) 2.5% DCS; (3) 2.5% DCS + 0. 2% CTR; (4) 2.5% DCS + 0.4% CTR and (5) 0.9% saline solution (SS) as the control. After 5 min of solution contact with the biofilms, the antimicrobial activity was evaluated by means of the adenosine triphosphate (ATP) assay as well as confocal laser scanning microscopy (CLSM). Microbial quantification was indicated as the percentage reduction of relative light units (RLUs) for the ATP assay, the Log10 total biovolume and the viability percentage (green cells) for CLSM. Solutions of 2.5% DCS + 0.4% CTR and 5% DCS showed the highest antimicrobial efficacy. Cetrimide increased the antibiofilm activity of diclofenac sodium against endodontic biofilms.
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Affiliation(s)
- Carmen Maria Ferrer-Luque
- Department of Stomatology, School of Dentistry, University of Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Carmen Solana
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | | | - Pilar Baca
- Department of Stomatology, School of Dentistry, University of Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - María Teresa Arias-Moliz
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
- Department of Microbiology, School of Dentistry, University of Granada, Granada, Spain
| | - Matilde Ruiz-Linares
- Department of Stomatology, School of Dentistry, University of Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
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Moreira AMS, Freitas ETF, Reis MDP, Nogueira JM, Barbosa NPDU, Reis ALM, Pelli A, Camargo PRDS, Cardoso AV, de Paula RS, Jorge EC. Acute Exposure to Two Biocides Causes Morphological and Molecular Changes in the Gill Ciliary Epithelium of the Invasive Golden Mussel Limnoperna fortunei (Dunker, 1857). Animals (Basel) 2023; 13:3258. [PMID: 37893982 PMCID: PMC10603641 DOI: 10.3390/ani13203258] [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: 08/10/2023] [Revised: 09/29/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
Limnoperna fortunei, the golden mussel, is a bivalve mollusk considered an invader in South America. This species is responsible for ecological and economic damages due to its voluminous fouling capability. Chemical biocides such as MXD-100™ and sodium dichloroisocyanurate (NaDCC) are often used to control L. fortunei infestations in hydraulic systems. Thus, we proposed to investigate the effects of different periods (24, 48 and 72 h) of exposure to MXD-100™ (0.56 mg L-1) and NaDCC (1.5 mg L-1) on the gills of L. fortunei through morphological and molecular analyses. NaDCC promoted progressive morphological changes during the analyzed periods and only an upregulation of SOD and HSP70 expression during the first 24 h of exposure. MXD-100™ led to severe morphological changes from the first period of exposure, in addition to an upregulation of SOD, CAT, HSP70 and CYP expression during the first 24 h. In contrast, MXD-100™ led to a downregulation of CAT transcription between 24 and 48 h. In static conditions, NaDCC causes lethal damage after 72 h of exposure, and that exposure needs to be continuous to achieve the control of the species. Meanwhile, the MXD-100™ treatment presented several effects during the first 24 h, showing acute toxicity in a shorter period of time.
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Affiliation(s)
- Amanda Maria Siqueira Moreira
- Laboratório de Biologia Oral e do Desenvolvimento, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, MG, Brazil; (A.M.S.M.); (J.M.N.); (R.S.d.P.)
- Centro de Bioengenharia de Espécies Invasoras de Hidrelétricas (CBEIH), Cidade Nova, Belo Horizonte 31035-536, MG, Brazil; (E.T.F.F.); (M.d.P.R.); (N.P.d.U.B.); (A.P.); (P.R.d.S.C.); (A.V.C.)
| | - Erico Tadeu Fraga Freitas
- Centro de Bioengenharia de Espécies Invasoras de Hidrelétricas (CBEIH), Cidade Nova, Belo Horizonte 31035-536, MG, Brazil; (E.T.F.F.); (M.d.P.R.); (N.P.d.U.B.); (A.P.); (P.R.d.S.C.); (A.V.C.)
- Electron Optics Facility, Materials Science and Engineering, Michigan Technological University, Houghton, MI 49931, USA
| | - Mariana de Paula Reis
- Centro de Bioengenharia de Espécies Invasoras de Hidrelétricas (CBEIH), Cidade Nova, Belo Horizonte 31035-536, MG, Brazil; (E.T.F.F.); (M.d.P.R.); (N.P.d.U.B.); (A.P.); (P.R.d.S.C.); (A.V.C.)
| | - Júlia Meireles Nogueira
- Laboratório de Biologia Oral e do Desenvolvimento, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, MG, Brazil; (A.M.S.M.); (J.M.N.); (R.S.d.P.)
| | - Newton Pimentel de Ulhôa Barbosa
- Centro de Bioengenharia de Espécies Invasoras de Hidrelétricas (CBEIH), Cidade Nova, Belo Horizonte 31035-536, MG, Brazil; (E.T.F.F.); (M.d.P.R.); (N.P.d.U.B.); (A.P.); (P.R.d.S.C.); (A.V.C.)
| | - André Luiz Martins Reis
- Center for Population Genomics, Garvan Institute of Medical Research, Sydney, NSW 2010, Australia;
| | - Afonso Pelli
- Centro de Bioengenharia de Espécies Invasoras de Hidrelétricas (CBEIH), Cidade Nova, Belo Horizonte 31035-536, MG, Brazil; (E.T.F.F.); (M.d.P.R.); (N.P.d.U.B.); (A.P.); (P.R.d.S.C.); (A.V.C.)
- Biotério Nico Nieser, Universidade Federal do Triângulo Mineiro, Uberaba 38025-100, MG, Brazil
| | - Paulo Ricardo da Silva Camargo
- Centro de Bioengenharia de Espécies Invasoras de Hidrelétricas (CBEIH), Cidade Nova, Belo Horizonte 31035-536, MG, Brazil; (E.T.F.F.); (M.d.P.R.); (N.P.d.U.B.); (A.P.); (P.R.d.S.C.); (A.V.C.)
- Biotério Nico Nieser, Universidade Federal do Triângulo Mineiro, Uberaba 38025-100, MG, Brazil
| | - Antonio Valadão Cardoso
- Centro de Bioengenharia de Espécies Invasoras de Hidrelétricas (CBEIH), Cidade Nova, Belo Horizonte 31035-536, MG, Brazil; (E.T.F.F.); (M.d.P.R.); (N.P.d.U.B.); (A.P.); (P.R.d.S.C.); (A.V.C.)
- Escola de Design, Universidade do Estado de Minas Gerais (UEMG), Belo Horizonte 30140-091, MG, Brazil
| | - Rayan Silva de Paula
- Laboratório de Biologia Oral e do Desenvolvimento, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, MG, Brazil; (A.M.S.M.); (J.M.N.); (R.S.d.P.)
- Centro de Bioengenharia de Espécies Invasoras de Hidrelétricas (CBEIH), Cidade Nova, Belo Horizonte 31035-536, MG, Brazil; (E.T.F.F.); (M.d.P.R.); (N.P.d.U.B.); (A.P.); (P.R.d.S.C.); (A.V.C.)
| | - Erika Cristina Jorge
- Laboratório de Biologia Oral e do Desenvolvimento, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, MG, Brazil; (A.M.S.M.); (J.M.N.); (R.S.d.P.)
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Jimoh AA, Booysen E, van Zyl L, Trindade M. Do biosurfactants as anti-biofilm agents have a future in industrial water systems? Front Bioeng Biotechnol 2023; 11:1244595. [PMID: 37781531 PMCID: PMC10540235 DOI: 10.3389/fbioe.2023.1244595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 09/04/2023] [Indexed: 10/03/2023] Open
Abstract
Biofilms are bacterial communities embedded in exopolymeric substances that form on the surfaces of both man-made and natural structures. Biofilm formation in industrial water systems such as cooling towers results in biofouling and biocorrosion and poses a major health concern as well as an economic burden. Traditionally, biofilms in industrial water systems are treated with alternating doses of oxidizing and non-oxidizing biocides, but as resistance increases, higher biocide concentrations are needed. Using chemically synthesized surfactants in combination with biocides is also not a new idea; however, these surfactants are often not biodegradable and lead to accumulation in natural water reservoirs. Biosurfactants have become an essential bioeconomy product for diverse applications; however, reports of their use in combating biofilm-related problems in water management systems is limited to only a few studies. Biosurfactants are powerful anti-biofilm agents and can act as biocides as well as biodispersants. In laboratory settings, the efficacy of biosurfactants as anti-biofilm agents can range between 26% and 99.8%. For example, long-chain rhamnolipids isolated from Burkholderia thailandensis inhibit biofilm formation between 50% and 90%, while a lipopeptide biosurfactant from Bacillus amyloliquefaciens was able to inhibit biofilms up to 96% and 99%. Additionally, biosurfactants can disperse preformed biofilms up to 95.9%. The efficacy of antibiotics can also be increased by between 25% and 50% when combined with biosurfactants, as seen for the V9T14 biosurfactant co-formulated with ampicillin, cefazolin, and tobramycin. In this review, we discuss how biofilms are formed and if biosurfactants, as anti-biofilm agents, have a future in industrial water systems. We then summarize the reported mode of action for biosurfactant molecules and their functionality as biofilm dispersal agents. Finally, we highlight the application of biosurfactants in industrial water systems as anti-fouling and anti-corrosion agents.
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Affiliation(s)
| | | | | | - Marla Trindade
- Department of Biotechnology, Institute for Microbial Biotechnology and Metagenomics (IMBM), University of the Western Cape, Cape Town, South Africa
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6
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Reis MDP, de Paula RS, E Souza CC, de Oliveira Júnior RB, Cardoso AV. Linking microbial slime community structure with abiotic factors and antifouling strategy in hydroelectric cooling systems. Braz J Microbiol 2023; 54:1547-1557. [PMID: 37301793 PMCID: PMC10484857 DOI: 10.1007/s42770-023-01020-3] [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: 04/18/2023] [Accepted: 05/26/2023] [Indexed: 06/12/2023] Open
Abstract
Microfouling can have significant economic impacts for hydroelectric power plants. However, knowledge concerning the composition and metabolism of microbial biofilm in cooling systems remains scarce. We examined the metagenome present in a cooling system, comprising a filter (F) and heat exchanger (HE), in the Nova Ponte hydroelectric power plant in Brazil, to identify bacteria and pathways that could be targeted to monitor and control biofilm formation. Our data revealed that the microfouling sample from heat exchanger 1 (HEM1), with porous consistency, presented enriched bacterial members not frequently described as biofilm formers in cooling systems, besides it has been shown to be an autoinducer repression pathway. Furthermore, the microfouling sample from heat exchanger 2 (HEM2), with gelatinous consistency, seemed to be an established biofilm, containing enriched bacterial groups such as Desulfotomaculum and Crenothrix and autoinducers, with biotechnological relevance in industrial biofilms. The results demonstrate that biofilm composition will vary depending on different abiotic conditions and the antifouling strategy used, including type of compound, concentration, and frequency of use. Therefore, all these variables must be evaluated when a power plant is affected by microbial slime in the cooling system. Our findings could help to define strategies for efficient and ecofriendly measures to contain microfouling in power plants.
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Affiliation(s)
- Mariana de Paula Reis
- Centro de Bioengenharia de Espécies Invasoras de Hidrelétricas (CBEIH), Avenida José Cândido da Silveira, 2100/09, Belo Horizonte, MG, 31035-536, Brazil.
| | - Rayan Silva de Paula
- Centro de Bioengenharia de Espécies Invasoras de Hidrelétricas (CBEIH), Avenida José Cândido da Silveira, 2100/09, Belo Horizonte, MG, 31035-536, Brazil
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Clara Carvalho E Souza
- Centro de Bioengenharia de Espécies Invasoras de Hidrelétricas (CBEIH), Avenida José Cândido da Silveira, 2100/09, Belo Horizonte, MG, 31035-536, Brazil
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Renato Brito de Oliveira Júnior
- Centro de Bioengenharia de Espécies Invasoras de Hidrelétricas (CBEIH), Avenida José Cândido da Silveira, 2100/09, Belo Horizonte, MG, 31035-536, Brazil
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Antonio Valadão Cardoso
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- Escola de Design, Universidade do Estado de Minas Gerais (UEMG), Belo Horizonte, MG, Brazil
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Yang H, Li X, Cao X, Lu S, Zheng X. The toxicity assessment of 14 biocides for industrial circulating cooling water system by damage/repair pathway profiling analysis. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023:104156. [PMID: 37217027 DOI: 10.1016/j.etap.2023.104156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 05/17/2023] [Accepted: 05/18/2023] [Indexed: 05/24/2023]
Abstract
The toxicity of 14 biocides commonly used in circulating cooling water systems were evaluated. Results showed that biocide exposure can induce complex damage/repair pathways, including DNA, oxidative, protein, general, and membrane stress. All damages enhanced with increasing concentrations. Among them, MTC exhibited toxicity at concentrations as low as 1.00×10-17mg/L, and TELItotal reached 1.60. We derived molecular toxicity endpoints based on dose-response curves to compare the normalized toxicity of biocides. Total-TELI1.5 exhibited that THPS, MTC, and DBNPA have the lowest toxic exposure concentrations, which are 2.180×10-27, 1.015×10-14, and 3.523×10-6 mg/L. TBTC, MTC, and 2,4-DCP had the highest Total-TELImax values, which are 861.70, 526.30, and 248.30. Moreover, there was a high correlation (R2=0.43~0.97) between biocides' molecular structure and toxicity. And, biocide exposure combinations were found to increase toxicity pathways and enhance toxic effects, with a similar toxicity mechanism observed as in single-component exposure.
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Affiliation(s)
- Heyun Yang
- State Key Laboratory of Eco-hydraulics in North west Arid Region, Xi'an University of Technology, Xi'an, 710048, China; School of Environmental and Natural Resources, Zhejiang University of Science & Technology, Hangzhou, 310023, China; Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an, Shaanxi 710048, China
| | - Xiaoliang Li
- State Key Laboratory of Eco-hydraulics in North west Arid Region, Xi'an University of Technology, Xi'an, 710048, China; Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an, Shaanxi 710048, China
| | - Xin Cao
- State Key Laboratory of Eco-hydraulics in North west Arid Region, Xi'an University of Technology, Xi'an, 710048, China; Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an, Shaanxi 710048, China
| | - Sijia Lu
- State Key Laboratory of Eco-hydraulics in North west Arid Region, Xi'an University of Technology, Xi'an, 710048, China; Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an, Shaanxi 710048, China
| | - Xing Zheng
- State Key Laboratory of Eco-hydraulics in North west Arid Region, Xi'an University of Technology, Xi'an, 710048, China; School of Environmental and Natural Resources, Zhejiang University of Science & Technology, Hangzhou, 310023, China; Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an, Shaanxi 710048, China; National Supervision & Inspection Center of Environmental Protection Equipment Quality, Jiangsu, Yixing 214205, China.
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Long-Term Antimicrobial Performance of Textiles Coated with ZnO and TiO 2 Nanoparticles in a Tropical Climate. J Funct Biomater 2022; 13:jfb13040233. [PMID: 36412874 PMCID: PMC9680289 DOI: 10.3390/jfb13040233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 11/04/2022] [Accepted: 11/06/2022] [Indexed: 11/11/2022] Open
Abstract
This paper reports the results of the large-scale field testing of composite materials with antibacterial properties in a tropical climate. The composite materials, based on a cotton fabric with a coating of metal oxide nanoparticles (TiO2 and/or ZnO), were produced using high-power ultrasonic treatment. The antibacterial properties of the materials were studied in laboratory tests on solid and liquid nutrient media using bacteria of different taxonomic groups (Escherichia coli, Chromobacterium violaceum, Pseudomonas chlororaphis). On solid media, the coatings were able to achieve a >50% decrease in the number of bacteria. The field tests were carried out in a tropical climate, at the Climate test station “Hoa Lac” (Hanoi city, Vietnam). The composite materials demonstrated long-term antibacterial activity in the tropical climate: the number of microorganisms remained within the range of 1−3% in comparison with the control sample for the duration of the experiment (3 months). Ten of the microorganisms that most frequently occurred on the surface of the coated textiles were identified. The bacteria were harmless, while the fungi were pathogenic and contributed to fabric deterioration. Tensile strength deterioration was also studied, with the fabrics coated with metal oxides demonstrating a better preservation of their mechanical characteristics over time, (there was a 42% tensile strength decrease for the reference non-coated sample and a 21% decrease for the sample with a ZnO + CTAB coating).
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9
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Farjami A, Jalilzadeh S, Siahi-Shadbad M, Lotfipour F. The anti-biofilm activity of hydrogen peroxide against Escherichia coli strain FL-Tbz isolated from a pharmaceutical water system. JOURNAL OF WATER AND HEALTH 2022; 20:1497-1505. [PMID: 36308494 DOI: 10.2166/wh.2022.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Biofilms are considered a significant reason for the failure of disinfection strategies in industrial water systems due to their resistance to antimicrobial agents. This study is designed to investigate the anti-biofilm activity of hydrogen peroxide (H2O2) at combinations of temperatures and contact times. For this purpose, an in vitro microtiter plate (MTP)-based model system was used for biofilm formation using Escherichia coli (E. coli) strain FL-Tbz isolated from the water system of a pharmaceutical plant. To investigate the anti-biofilm activity of H2O2, it was added at different concentrations (2-7% v/v) to biofilms and incubated at different temperatures (20-60 °C) for 10-40 min to find effective conditions to eradicate biofilms. Maximum biofilms were formed when bacterial suspensions were incubated at 37 °C for 96 h. The rate of biofilm formation using an environmental isolate was higher than that of standard strain. H2O2 at concentrations of ≥6.25% (v/v) at temperatures of ≥40 °C incubated for ≥25 min significantly eradicated the biofilms.
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Affiliation(s)
- Afsaneh Farjami
- Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran E-mail: ; Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sina Jalilzadeh
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammadreza Siahi-Shadbad
- Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran E-mail: ; Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Farzaneh Lotfipour
- Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran E-mail: ; Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Biochemistry, Microbiology, and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
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Girase CD, Rajput YN, Hatkar VM, Kulkarni RD. Synthesis and characterizations of cationic poly(DADMAC-co-AM) surfactant for hair care applications. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03113-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Laroche C. Exopolysaccharides from Microalgae and Cyanobacteria: Diversity of Strains, Production Strategies, and Applications. Mar Drugs 2022; 20:md20050336. [PMID: 35621987 PMCID: PMC9148076 DOI: 10.3390/md20050336] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 05/14/2022] [Accepted: 05/18/2022] [Indexed: 12/04/2022] Open
Abstract
Microalgae and cyanobacteria are photosynthetic organisms that can produce/accumulate biomolecules with industrial interest. Among these molecules, EPSs are macromolecular polysaccharidic compounds that present biological activities and physico-chemical properties, allowing to consider their valorization in diverse commercial markets, such as cosmetic, therapeutic, nutraceutic, or hydrocolloids areas. The number of microalgae and cyanobacteria strains described to produce such EPSs has increased in recent years as, among the 256 producing strains gathered in this review, 86 were published in the last 10 years (~33%). Moreover, with the rise of research on microalgae EPSs, a variety of monosaccharides compositions have been discovered, highlighting the versatility of these organisms. If some production strategies can be applied to increase EPS production yields, it appears that case by case studies are needed to promote EPS synthesis by a strain, as many responses exist. This paper proposes an up-to-date state of the art of the diversity of microalgae and cyanobacteria EPS-producing strains, associated to the variability of compositions. The strategies for the production and extraction of the polymers are also discussed. Finally, an overview of the biological activities and physico-chemical properties allow one to consider their use on several commercial markets.
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Affiliation(s)
- Céline Laroche
- Clermont Auvergne INP, CNRS, Institut Pascal, Université Clermont-Auvergne, F-63000 Clermont-Ferrand, France
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12
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Farjami A, Hatami MS, Siahi-Shadbad M, Lotfipour F. Peracetic acid Activity on Biofilm Formed by Escherichia coli Isolated from an Industrial Water System. Lett Appl Microbiol 2022; 74:613-621. [PMID: 34984695 DOI: 10.1111/lam.13647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 12/26/2021] [Accepted: 12/28/2021] [Indexed: 11/30/2022]
Abstract
One of the major problems in industrial water systems is the generation of biofilm, which is resistant to antimicrobial agents and causes failure of sanitization policy. This work aimed to study the anti-biofilm activity of peracetic acid (PAA) at contact times and temperatures combinations. To this end, a 96 well microtiter-based calorimetric method was applied in in vitro biofilm production using Ecsherichia coli, isolated from the water supply system of a pharmaceutical plant. The phenotypic and phylogenetic tests confirmed the isolated bacteria belong to strains of Ecsherichia coli. The anti-biofilm activity of peracetic acid on formed biofilm was investigated at concentrations of 0.15-0.5% for a contact time of 5-15 min at 20°C to 60°C. The maximum biofilm formation by MTP method using an Ecsherichia coli isolate was achieved in 96 h incubation in TSB containing wells at 37°C. Biofilm formation rate showed to be high by the environmental isolate compared with that of standard strain. PAA at concentrations above 0.25%, the temperature of 40°C, and a minimum of 10 minutes of contact time was effective in the eradication of biofilm in an MPT-based system.
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Affiliation(s)
- Afsaneh Farjami
- Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Mohammadreza Siahi-Shadbad
- Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Farzaneh Lotfipour
- Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
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13
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Moro GG, Massat NC, Grandizoli DRP, Junior AE, Degasperi GR, Fontana CE, Pinheiro SL. Effect of cetrimide 2% with and without photodynamic therapy to reduce Streptococcus mutans burden in dentinal carious lesions. Lasers Med Sci 2021; 36:1935-1940. [PMID: 33786671 PMCID: PMC8009689 DOI: 10.1007/s10103-021-03300-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/22/2021] [Indexed: 11/27/2022]
Abstract
To evaluate the use of cetrimide alone and combined with photodynamic therapy to reduce S. mutans burden in carious lesions. Sixty permanent third molars were sectioned and the coronal dentin exposed. A cariogenic challenge was performed using brain-heart infusion (BHI) medium supplemented and S. mutans ATCC 25175. Specimens were incubated in anaerobic jars at 37 °C for 15 days, with BHI renewed every 24 h. After 15 days, specimens were randomly divided into six groups (n = 10): C, control (no treatment); CHX, application of chlorhexidine 2%; CT, application of cetrimide 2%; CT+aPDT, application of cetrimide 2% followed by methylene blue dye and aPDT (antimicrobial photodynamic therapy: wavelength 660 nm, energy 4J, power 100 mW, spot size 0.0028 cm2, energy density 142 J/cm2 for 40 s); ES+aPDT, application of experimental solution (methylene blue dye with cetrimide) and aPDT; and aPDT alone. Carious tissue from each specimen was collected before and after the applications. Five decimal dilutions were performed, and the resulting solution was seeded in mitis-salivarius-bacitracin agar. Plates were incubated in anaerobic jars at 37 °C for 48 h. Analysis of variance (ANOVA) with post hoc Tukey's test was used to compare total S. mutans counts. Significant reductions in S. mutans were observed after application of CT+aPDT (0.30 (0.97), p < 0.0001) and ES+aPDT (0.52 (1.13), p < 0.0001). Cetrimide 2% with methylene blue dye, applied consecutively or as a mixture, can be used as a photosensitizing agent for aPDT to reduce S. mutans burden in dentinal caries.
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Affiliation(s)
- Gabriele Giorgi Moro
- Department of Restorative Dentistry, Pontifical Catholic University of Campinas (PUC Campinas), Campinas, SP, Brazil
| | - Natalia Cunha Massat
- Center for Life Sciences, Postgraduate Program in Health Sciences, PUC Campinas, Av. John Boyd Dunlop, s/n, Campinas, SP, 13034-685, Brazil
| | - Diana Roberta Pereira Grandizoli
- Center for Life Sciences, Postgraduate Program in Health Sciences, PUC Campinas, Av. John Boyd Dunlop, s/n, Campinas, SP, 13034-685, Brazil
| | - Augusto Etchegaray Junior
- Center for Life Sciences, Postgraduate Program in Health Sciences, PUC Campinas, Av. John Boyd Dunlop, s/n, Campinas, SP, 13034-685, Brazil
| | | | - Carlos Eduardo Fontana
- Center for Life Sciences, Postgraduate Program in Health Sciences, PUC Campinas, Av. John Boyd Dunlop, s/n, Campinas, SP, 13034-685, Brazil
| | - Sérgio Luiz Pinheiro
- Center for Life Sciences, Postgraduate Program in Health Sciences, PUC Campinas, Av. John Boyd Dunlop, s/n, Campinas, SP, 13034-685, Brazil.
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14
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Proner MC, de Meneses AC, Veiga AA, Schlüter H, Oliveira DD, Luccio MD. Industrial Cooling Systems and Antibiofouling Strategies: A Comprehensive Review. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05985] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mariane Carolina Proner
- Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina 88040-900, Brazil
| | - Alessandra Cristina de Meneses
- Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina 88040-900, Brazil
| | - Andrea Azevedo Veiga
- Petrobras R&D Center, CENPES, Av. Horácio Macedo, 950, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, Rio de Janeiro 21941-915, Brazil
| | - Helga Schlüter
- Petrobras R&D Center, CENPES, Av. Horácio Macedo, 950, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, Rio de Janeiro 21941-915, Brazil
| | - Débora de Oliveira
- Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina 88040-900, Brazil
| | - Marco Di Luccio
- Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina 88040-900, Brazil
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15
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Gharieb R, Saad M, Abdallah K, Khedr M, Farag E, Abd El-Fattah A. Insights on toxin genotyping, virulence, antibiogram profiling, biofilm formation and efficacy of disinfectants on biofilms of Clostridium perfringens isolated from poultry, animals and humans. J Appl Microbiol 2020; 130:819-831. [PMID: 32881183 DOI: 10.1111/jam.14838] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 08/20/2020] [Accepted: 08/22/2020] [Indexed: 01/24/2023]
Abstract
AIMS This study aimed to determine the toxin genotypes, virulence determinants and antibiogram of Clostridium perfringens isolated from poultry, animals and humans. Biofilm formation and the efficacy of disinfectants on C. perfringens biofilms were studied. METHODS AND RESULTS Thirty C. perfringens isolates (20 clinical and 10 from chicken carcasses) were genotyped by PCR and all isolates were genotype A (cpa+). The overall prevalence of cpe, cpb2, netB and tpeL virulence genes was 6·7, 56·7, 56·7 and 36·7% respectively. Twenty-one isolates (70%) were multidrug-resistant, 8 (26·7%) were extensive drug-resistant and one isolate (3·3%) was pan drug-resistant. The average multiple antibiotic resistance index was 0·7. Biofilms were produced by 63·3% of C. perfringens isolates and categorized as weak (36·7%), moderate (16·7%) and strong (10%). Sodium hypochlorite caused significant reduction in C. perfringens biofilms (P < 0·0001). CONCLUSIONS All C. perfringens strains in this study were type A, resistant to multiple antibiotics and most of them were biofilm producers. Sodium hypochlorite showed higher efficacy in reducing C. perfringens biofilms. SIGNIFICANCE AND IMPACT OF THE STUDY This study reported the efficacy of disinfectants in reducing C. perfringens biofilms of economic and public health concern and recommends application on surfaces in farms, food processing plants and slaughterhouses.
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Affiliation(s)
- R Gharieb
- Department of Zoonoses, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - M Saad
- Department of Veterinary Public Health, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - K Abdallah
- Department of Food Control, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - M Khedr
- Department of Veterinary Public Health, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - E Farag
- Department of Bacteriology, Animal Health Research Institute, Cairo, Egypt
| | - A Abd El-Fattah
- Department of Animal Wealth Development, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
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16
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Propolsky D, Romanovskaia E, Kwapinski W, Romanovski V. Modified activated carbon for deironing of underground water. ENVIRONMENTAL RESEARCH 2020; 182:108996. [PMID: 31835115 DOI: 10.1016/j.envres.2019.108996] [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: 07/30/2019] [Revised: 11/21/2019] [Accepted: 12/02/2019] [Indexed: 06/10/2023]
Abstract
Successful water treatment is one of the most important aspects for a healthy human life and environmental protection. This study deals with the investigation of a modified catalytic material that is used in water treatment as one of the most promising filter media for water deironing. The activated carbon granules were coated with iron oxide by solution combustion synthesis (SCS) method in a muffle furnace oven. We investigated obtained samples using different diffraction and spectroscopic methods. The elemental composition of the surface and phases of produced materials and the results of comparative analysis with initial samples of the raw material used for the underground water deironing were presented. Using the SCS method, active coal granules were modified with a formation of fine dispersed and crystalline structures of magnetite on their surface. This had a positive effect on the catalytic capacity of the material for deironing of underground water as well as for the specific surface area increase. The residual concentration of total iron in the first portions of the filtrate when using modified samples was almost 3 times lower than for initial material.
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Affiliation(s)
- Dmitry Propolsky
- Water Supply and Water Disposal Department, Belarusian National Technical University. 220013, Nezavisimosty Ave., 150, Building 15, Minsk, Belarus
| | - Elena Romanovskaia
- Department of Chemistry, Technology of Electrochemical Production and Electronic Engineering Materials, Belarusian State Technological University, Belarus; Department of Chemical Sciences, University of Limerick, Limerick, V94 T9PX, Ireland
| | - Witold Kwapinski
- Department of Chemical Sciences, University of Limerick, Limerick, V94 T9PX, Ireland
| | - Valentin Romanovski
- Department of Chemical Sciences, University of Limerick, Limerick, V94 T9PX, Ireland; Science and Research Centre of Functional Nano-Ceramics, National University of Science and Technology "MISIS", 119049, Lenin av., 4, Moscow, Russia; Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus, 220072, Surganova str., 9/1, Minsk, Belarus.
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17
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Bryce G, Pratten J, Ready D, Ng YL, Gulabivala K. Disruption and bactericidal indices depicted in polygonal graphs to show multiple outcome effects of root canal irrigant supplements on single- and dual-species biofilms. Clin Oral Investig 2020; 24:3255-3264. [PMID: 31953683 DOI: 10.1007/s00784-020-03202-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 01/07/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The aims of this study were to (1) investigate the relative time-dependent disruption and bactericidal effects of detergent-type surfactants on single- or dual-species biofilms of root canal isolates and (2) to examine the utility of polygonal graphs for depiction of biofilm disruption and cell killing. MATERIALS AND METHODS Single-species biofilms of Streptococcus sanguinis, Enterococcus faecalis, Fusobacterium nucleatum and Porphyromonas gingivalis were grown on nitro-cellulose membranes for 72 h and immersed in Tween®80, cetyltrimethylammoniumbromide (CTAB), and sodium dodecyl sulphate (SDS) for 1-, 5- or 10-min (n = 3 per test). The number of viable and non-viable bacteria "disrupted" from the biofilm and those "remaining-attached" was determined using a viability stain in conjunction with fluorescence microscopy. The data were analysed using non-parametric Kruskal-Wallis test with 5% significance level. RESULTS Gram-negative obligate anaerobes were more susceptible to cell removal than gram-positive facultative anaerobes. The majority of cells were disrupted after 1-min of exposure; however, the extent varied according to the agent and species. CTAB and SDS were more effective than Tween 80™ at disrupting biofilms and killing cells but all agents failed to achieve 100% disruption/kill. CONCLUSIONS Biofilm disruption and cell viability were influenced by the species, the test agent and the duration of exposure. CTAB and SDS were more effective in biofilm disruption than Tween 80™. Graphical depiction of biofilm disruption- and viability-outcomes provides an alternative means of simultaneously visualising and analysing relative efficacy in different domains. CLINICAL RELEVANCE Surfactants were not as effective at biofilm disruption as NaOCl but may be added to other non-disruptive antibacterial agents to enhance this property.
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Affiliation(s)
- G Bryce
- Defence Primary Health Care, Defence Centre for Rehabilitative Dentistry, Evelyn Woods Road, Aldershot, GU11 2LS, UK
| | - J Pratten
- Public Health England, Respiratory and Systemic Bacteria Section, PHE - National Infection Service, London, UK
| | - D Ready
- Clinical Microbiology and Public Health Laboratory, Public Health England, England, UK
| | - Y-L Ng
- Unit of Endodontology, Department of Restorative Dentistry, UCL Eastman Dental Institute, University College London, 256 Grays Inn Road, London, WC1X 8LD, UK.
| | - K Gulabivala
- Unit of Endodontology, Department of Restorative Dentistry, UCL Eastman Dental Institute, University College London, 256 Grays Inn Road, London, WC1X 8LD, UK
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18
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Critical point analysis and biocide treatment in a microbiologically contaminated water purification system of a power plant. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0740-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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19
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Di Pippo F, Di Gregorio L, Congestri R, Tandoi V, Rossetti S. Biofilm growth and control in cooling water industrial systems. FEMS Microbiol Ecol 2019; 94:4935158. [PMID: 29596620 DOI: 10.1093/femsec/fiy044] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 03/13/2018] [Indexed: 12/18/2022] Open
Abstract
Matrix-embedded, surface-attached microbial communities, known as biofilms, profusely colonise industrial cooling water systems, where the availability of nutrients and organic matter favours rapid microbial proliferation and their adhesion to surfaces in the evaporative fill material, heat exchangers, water reservoir and cooling water sections and pipelines. The extensive growth of biofilms can promote micro-biofouling and microbially induced corrosion (MIC) as well as pose health problems associated with the presence of pathogens like Legionella pneumophila. This review examines critically biofilm occurrence in cooling water systems and the main factors potentially affecting biofilm growth, biodiversity and structure. A broad evaluation of the most relevant biofilm monitoring and control strategies currently used or potentially useful in cooling water systems is also provided.
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Affiliation(s)
- F Di Pippo
- CNR-IRSA, National Research Council, Water Research Institute, Via Salaria Km 29.300, Monterotondo 00015, Rome, Italy.,CNR-IAMC, National Research Council, Institute for Coastal Marine Environment, Località Sa Mardini, Torregrande, 09170 Oristano, Italy
| | - L Di Gregorio
- CNR-IRSA, National Research Council, Water Research Institute, Via Salaria Km 29.300, Monterotondo 00015, Rome, Italy.,University of Rome Tor Vergata, Department of Biology, Via Cracovia 1, 00133 Rome, Italy
| | - R Congestri
- University of Rome Tor Vergata, Department of Biology, Via Cracovia 1, 00133 Rome, Italy
| | - V Tandoi
- CNR-IRSA, National Research Council, Water Research Institute, Via Salaria Km 29.300, Monterotondo 00015, Rome, Italy
| | - S Rossetti
- CNR-IRSA, National Research Council, Water Research Institute, Via Salaria Km 29.300, Monterotondo 00015, Rome, Italy
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20
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Song P, Zhou B, Feng G, Brooks JP, Zhou H, Zhao Z, Liu Y, Li Y. The influence of chlorination timing and concentration on microbial communities in labyrinth channels: implications for biofilm removal. BIOFOULING 2019; 35:401-415. [PMID: 31142151 DOI: 10.1080/08927014.2019.1600191] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 03/18/2019] [Accepted: 03/22/2019] [Indexed: 06/09/2023]
Abstract
Chlorination is an effective method to control biofilm formation in enclosed pipelines. To date, very little is known about how to control biofilms at the mesoscale in complex pipelines through chlorination. In this study, the dynamic of microbial communities was examined under different residual chlorine concentrations on the biofilms attached to labyrinth channels for drip irrigation using reclaimed water. The results indicated that the microbial phospholipid fatty acids, extracellular polymeric substances, microbial dynamics, and the ace and Shannon microbial diversity indices showed a gradual decrease after chlorination. However, chlorination increased microbial activity by 0.5-19.2%. The increase in the relative abundances of chloride-resistant bacteria (Acinetobacter and Thermomonas) could lead to a potential risk of chlorine resistance. Thus, keeping a low chlorine concentration (0.83 mg l-1 for 3 h) is effective for controlling biofilm formation in the labyrinth channels.
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Affiliation(s)
- Peng Song
- a College of Water Resources and Civil Engineering , China Agricultural University , Beijing , PR China
- b Genetics and Sustainable Agricultural Research Unit , United States Department of Agriculture , Starkville , MS , USA
| | - Bo Zhou
- a College of Water Resources and Civil Engineering , China Agricultural University , Beijing , PR China
- c College of Agricultural and Life Sciences , University of Wisconsin-Madison , Madison , WI , USA
| | - Gary Feng
- b Genetics and Sustainable Agricultural Research Unit , United States Department of Agriculture , Starkville , MS , USA
| | - John P Brooks
- b Genetics and Sustainable Agricultural Research Unit , United States Department of Agriculture , Starkville , MS , USA
| | - Hongxu Zhou
- a College of Water Resources and Civil Engineering , China Agricultural University , Beijing , PR China
| | - Zhirui Zhao
- d Research Center for Eco-environmental Sciences , Chinese Academy of Sciences , Beijing , PR China
| | - Yaoze Liu
- e Department of Environmental and Sustainable Engineering , University at Albany , Albany , NY , USA
| | - Yunkai Li
- a College of Water Resources and Civil Engineering , China Agricultural University , Beijing , PR China
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21
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Percival SL, Mayer D, Kirsner RS, Schultz G, Weir D, Roy S, Alavi A, Romanelli M. Surfactants: Role in biofilm management and cellular behaviour. Int Wound J 2019; 16:753-760. [PMID: 30883044 DOI: 10.1111/iwj.13093] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/17/2019] [Accepted: 01/21/2019] [Indexed: 01/08/2023] Open
Abstract
Appropriate and effective wound cleaning represents an important process that is necessary for preparing the wound for improved wound healing and for helping to dislodge biofilms. Wound cleaning is of paramount importance to wound bed preparation for helping to enhance wound healing. Surfactant applications in wound care may represent an important area in the cleaning continuum. However, understanding of the role and significance of surfactants in wound cleansing, biofilm prevention and control, and enhancing cellular viability and proliferation is currently lacking. Despite this, some recent evidence on poloxamer-based surfactants where the surfactants are present in high concentration have been shown to have an important role to play in biofilm management; matrix metalloproteinase modulation; reducing inflammation; and enhancing cellular proliferation, behaviour, and viability. Consequently, this review aims to discuss the role, mode of action, and clinical significance of the use of medically accepted surfactants, with a focus on concentrated poloxamer-based surfactants, to wound healing but, more specifically, the role they may play in biofilm management and effects on cellular repair.
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Affiliation(s)
- Steven L Percival
- 5D Health Protection Group Ltd, Liverpool Bio-Innovation Hub, Liverpool, UK.,Department of Research and Development, Centre of Excellence in Biofilm science (CEBS), Liverpool Bio-Innovation Hub, Liverpool, UK
| | - Dieter Mayer
- Department of Surgery, HFR Fribourg - Cantonal Hospital, Fribourg, Switzerland
| | - Robert S Kirsner
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami, Miami, Florida
| | - Greg Schultz
- Institute for Wound Research, University of Florida, Gainesville, Florida
| | - Dot Weir
- Catholic Health Advanced Wound Healing Centers, Buffalo, New York
| | - Sashwati Roy
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, Indiana
| | - Afsaneh Alavi
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
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22
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Di Gregorio L, Congestri R, Tandoi V, Neu TR, Rossetti S, Di Pippo F. Biofilm diversity, structure and matrix seasonality in a full-scale cooling tower. BIOFOULING 2018; 34:1093-1109. [PMID: 30663885 DOI: 10.1080/08927014.2018.1541454] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 10/23/2018] [Accepted: 10/24/2018] [Indexed: 06/09/2023]
Abstract
Biofilms commonly colonise cooling water systems, causing equipment damage and interference with the operational requirements of the systems. In this study, next-generation sequencing (NGS), catalysed reporter deposition fluorescence in situ hybridisation (CARD-FISH), lectin staining and microscopy were used to evaluate temporal dynamics in the diversity and structure of biofilms collected seasonally over one year from an open full-scale cooling tower. Water samples were analysed to evaluate the contribution of the suspended microorganisms to the biofilm composition and structure. Alphaproteobacteria dominated the biofilm communities along with Beta- and Gammaproteobacteria. The phototrophic components were mainly cyanobacteria, diatoms and green algae. Bacterial biodiversity decreased from winter to autumn, concurrently with an increase in cyanobacterial and microalgal richness. Differences in structure, spatial organisation and glycoconjugates were observed among assemblages during the year. Overall, microbial variation appeared to be mostly affected by irradiance and water temperature rather than the source of the communities. Variations in biofilms over seasons should be evaluated to develop specific control strategies.
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Affiliation(s)
- L Di Gregorio
- a CNR-IRSA , Water Research Institute , Rome , Italy
- b Department of Biology , University of Rome Tor Vergata , Rome , Italy
| | - R Congestri
- b Department of Biology , University of Rome Tor Vergata , Rome , Italy
| | - V Tandoi
- a CNR-IRSA , Water Research Institute , Rome , Italy
| | - T R Neu
- c Department of River Ecology , Helmholtz Centre for Environmental Research - UFZ , Magdeburg , Germany
| | - S Rossetti
- a CNR-IRSA , Water Research Institute , Rome , Italy
| | - F Di Pippo
- a CNR-IRSA , Water Research Institute , Rome , Italy
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23
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Kannan P, Su SS, Mannan MS, Castaneda H, Vaddiraju S. A Review of Characterization and Quantification Tools for Microbiologically Influenced Corrosion in the Oil and Gas Industry: Current and Future Trends. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b02211] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Pranav Kannan
- Mary Kay O’Connor Process Safety Center, Texas A&M University System, 3122 TAMU, College Station, Texas 77843-3122, United States
- Artie McFerrin Department of Chemical Engineering, Texas A&M University System, 3122 TAMU, College Station, Texas 77843-3122, United States
| | - Shei Sia Su
- National Corrosion and Materials Reliability Laboratory, Texas A&M University, College Station, Texas 77843-3003, United States
- Materials Science and Engineering Department, Texas A&M University, College Station, Texas 77843-3003, United States
| | - M. Sam Mannan
- Mary Kay O’Connor Process Safety Center, Texas A&M University System, 3122 TAMU, College Station, Texas 77843-3122, United States
- Artie McFerrin Department of Chemical Engineering, Texas A&M University System, 3122 TAMU, College Station, Texas 77843-3122, United States
| | - Homero Castaneda
- National Corrosion and Materials Reliability Laboratory, Texas A&M University, College Station, Texas 77843-3003, United States
- Materials Science and Engineering Department, Texas A&M University, College Station, Texas 77843-3003, United States
| | - Sreeram Vaddiraju
- Mary Kay O’Connor Process Safety Center, Texas A&M University System, 3122 TAMU, College Station, Texas 77843-3122, United States
- Artie McFerrin Department of Chemical Engineering, Texas A&M University System, 3122 TAMU, College Station, Texas 77843-3122, United States
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24
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Sharma M, Menon P, Voordouw J, Shen Y, Voordouw G. Effect of long term application of tetrakis(hydroxymethyl)phosphonium sulfate (THPS) in a light oil-producing oilfield. BIOFOULING 2018; 34:605-617. [PMID: 30149740 DOI: 10.1080/08927014.2018.1476500] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 05/09/2018] [Indexed: 06/08/2023]
Abstract
Samples of (I) produced waters, (II) central processing facility (CPF) waters and (III) pipeline solids were collected from a light oil-producing field. The biocide, tetrakis(hydroxymethyl)phosphonium sulfate (THPS) was routinely used in the CPF. Samples monitoring indicated that THPS was effective in microbial control but also increased concentrations of sulfate and phosphate in transitioning from Type I to Type II waters. Type II waters had high concentrations (up to 60 mM) of acetate but low most probable numbers (MPNs) of acid-producing and sulfate-reducing bacteria, indicating the presence of active biocide, as high MPNs were found in Type I waters. Solids had high phosphate and high MPNs, indicating that THPS was inactive. Solids had oil and an anaerobic community dominated by Acetobacterium, which may contribute to conversion of oil to acetate. The presence of THPS prevented the use of this acetate in Type II waters, where it accumulated to unusually high concentrations.
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Affiliation(s)
- Mohita Sharma
- a Petroleum Microbiology Research Group , Department of Biological Sciences , University of Calgary , Calgary , Canada
| | - Priyesh Menon
- a Petroleum Microbiology Research Group , Department of Biological Sciences , University of Calgary , Calgary , Canada
| | - Johanna Voordouw
- a Petroleum Microbiology Research Group , Department of Biological Sciences , University of Calgary , Calgary , Canada
| | - Yin Shen
- a Petroleum Microbiology Research Group , Department of Biological Sciences , University of Calgary , Calgary , Canada
| | - Gerrit Voordouw
- a Petroleum Microbiology Research Group , Department of Biological Sciences , University of Calgary , Calgary , Canada
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Gafri HFS, Mohamed Zuki F, Aroua MK, Hashim NA. Mechanism of bacterial adhesion on ultrafiltration membrane modified by natural antimicrobial polymers (chitosan) and combination with activated carbon (PAC). REV CHEM ENG 2018. [DOI: 10.1515/revce-2017-0006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Abstract
Bacterial adhesion to surfaces is related to several factors, such as surface charge, surface energy, and substrate characteristics (leading to the formation of biofilms). Organisms are dominant in most environmental, industrial, and medical problems and processes that are of interest to microbiologists. Biofilm cells are at least 500 times more resistant to antibacterial agents compared to planktonic cells. The usage of ultrafiltration membranes is fast becoming popular for water treatment. Membrane lifetime and permeate flux are primarily affected by the phenomena of microbial accumulation and fouling at the membrane’s surface. This review intends to understand the mechanism of membrane fouling by bacterial attachment on polymeric ultrafiltration membrane modified by natural antimicrobial polymers (chitosan) combined with powder activated carbon. Also, to guide future research on membrane water treatment processes, adhesion prediction using the extended Derjaguin-Landau-Verwey-Overbeek theory is discussed.
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Affiliation(s)
- Hasan Fouzi S. Gafri
- Department of Chemical Engineering , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Fathiah Mohamed Zuki
- Department of Chemical Engineering , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Mohamed Kheireddine Aroua
- Centre for Carbon Dioxide Capture and Utilization (CCDCU), School of Science and Technology , Sunway University, Bandar Sunway , 47500 Petaling Jaya , Malaysia
- Department of Engineering , Lancaster University , Lancaster, LA1 4YW , UK
| | - Nur Awanis Hashim
- Department of Chemical Engineering , University of Malaya , 50603 Kuala Lumpur , Malaysia
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Characterization, genetic regulation and production of cyanobacterial exopolysaccharides and its applicability for heavy metal removal. Carbohydr Polym 2018; 179:228-243. [DOI: 10.1016/j.carbpol.2017.09.091] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 09/15/2017] [Accepted: 09/26/2017] [Indexed: 11/18/2022]
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Jia R, Li Y, Al-Mahamedh HH, Gu T. Enhanced Biocide Treatments with D-amino Acid Mixtures against a Biofilm Consortium from a Water Cooling Tower. Front Microbiol 2017; 8:1538. [PMID: 28861053 PMCID: PMC5561659 DOI: 10.3389/fmicb.2017.01538] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 07/31/2017] [Indexed: 02/02/2023] Open
Abstract
Different species of microbes form mixed-culture biofilms in cooling water systems. They cause microbiologically influenced corrosion (MIC) and biofouling, leading to increased operational and maintenance costs. In this work, two D-amino acid mixtures were found to enhance two non-oxidizing biocides [tetrakis hydroxymethyl phosphonium sulfate (THPS) and NALCO 7330 (isothiazoline derivatives)] and one oxidizing biocide [bleach (NaClO)] against a biofilm consortium from a water cooling tower in lab tests. Fifty ppm (w/w) of an equimass mixture of D-methionine, D-leucine, D-tyrosine, D-tryptophan, D-serine, D-threonine, D-phenylalanine, and D-valine (D8) enhanced 15 ppm THPS and 15 ppm NALCO 7330 with similar efficacies achieved by the 30 ppm THPS alone treatment and the 30 ppm NALCO 7330 alone treatment, respectively in the single-batch 3-h biofilm removal test. A sequential treatment method was used to enhance bleach because D-amino acids react with bleach. After a 4-h biofilm removal test, the sequential treatment of 5 ppm bleach followed by 50 ppm D8 achieved extra 1-log reduction in sessile cell counts of acid producing bacteria, sulfate reducing bacteria, and general heterotrophic bacteria compared with the 5 ppm bleach alone treatment. The 10 ppm bleach alone treatment showed a similar efficacy with the sequential treatment of 5 ppm bleach followed by 50 ppm D8. The efficacy of D8 was found better than that of D4 (an equimass mixture of D-methionine, D-leucine, D-tyrosine, and D-tryptophan) in the enhancement of the three individual biocides against the biofilm consortium.
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Affiliation(s)
- Ru Jia
- Department of Chemical and Biomolecular Engineering, Institute for Corrosion and Multiphase Technology, Ohio University, AthensOH, United States
| | - Yingchao Li
- Beijing Key Laboratory of Failure, Corrosion and Protection of Oil/Gas Facility Materials, Department of Materials Science and Engineering, China University of Petroleum - BeijingBeijing, China
| | | | - Tingyue Gu
- Department of Chemical and Biomolecular Engineering, Institute for Corrosion and Multiphase Technology, Ohio University, AthensOH, United States
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Hui YW, Narayanan K, Dykes GA. Control of Attachment of Pseudomonas aeruginosa and Burkholderia cepacia to Surfaces by Shear Force. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2016; 88:2040-2046. [PMID: 26704787 DOI: 10.2175/106143016x14504669767292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The effect of physical shearing on the attachment of six Pseudomonas aeruginosa strains and six Burkholderia cepacia strains to glass, stainless steel, polystyrene and Teflon® was determined. A significant (p < 0.05) decrease in hydrophobicity was apparent for all P. aeruginosa strains (17-36%) and B. cepacia, MS 5 (20%) after shearing. A significant (p < 0.05) decrease in attachment of some P. aeruginosa (0.2-0.5 log CFU/cm2) and B. cepacia (0.2-0.4 log CFU/cm2) strains to some surface types was apparent after shearing. Significant (p < 0.05) correlation was observed for both numbers of flagellated cells and hydrophobicity against attachment to glass, stainless steel and polystyrene for P. aeruginosa while only hydrophobicity showed significant correlation against the same surfaces for B. cepacia. Scanning electron microscopy and protein analysis showed that shearing removed surface proteins from the cells and may have led to the observed changes in hydrophobicity and attachment to abiotic surfaces.
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Affiliation(s)
- Yew Woh Hui
- School of Science, Monash University, Jalan Lagoon Selatan, 46150 Bandar Sunway, Selangor, Malaysia
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29
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Production, extraction and characterization of microalgal and cyanobacterial exopolysaccharides. Biotechnol Adv 2016; 34:1159-1179. [DOI: 10.1016/j.biotechadv.2016.08.001] [Citation(s) in RCA: 232] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 07/22/2016] [Accepted: 08/09/2016] [Indexed: 12/20/2022]
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30
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Meireles A, Borges A, Giaouris E, Simões M. The current knowledge on the application of anti-biofilm enzymes in the food industry. Food Res Int 2016. [DOI: 10.1016/j.foodres.2016.06.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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In Situ Biomineralization and Particle Deposition Distinctively Mediate Biofilm Susceptibility to Chlorine. Appl Environ Microbiol 2016; 82:2886-92. [PMID: 26944848 DOI: 10.1128/aem.03954-15] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 02/29/2016] [Indexed: 01/08/2023] Open
Abstract
Microbial biofilms and mineral precipitation commonly co-occur in engineered water systems, such as cooling towers and water purification systems, and both decrease process performance. Microbial biofilms are extremely challenging to control and eradicate. We previously showed that in situ biomineralization and the precipitation and deposition of abiotic particles occur simultaneously in biofilms under oversaturated conditions. Both processes could potentially alter the essential properties of biofilms, including susceptibility to biocides. However, the specific interactions between mineral formation and biofilm processes remain poorly understood. Here we show that the susceptibility of biofilms to chlorination depends specifically on internal transport processes mediated by biomineralization and the accumulation of abiotic mineral deposits. Using injections of the fluorescent tracer Cy5, we show that Pseudomonas aeruginosa biofilms are more permeable to solutes after in situ calcite biomineralization and are less permeable after the deposition of abiotically precipitated calcite particles. We further show that biofilms are more susceptible to chlorine killing after biomineralization and less susceptible after particle deposition. Based on these observations, we found a strong correlation between enhanced solute transport and chlorine killing in biofilms, indicating that biomineralization and particle deposition regulate biofilm susceptibility by altering biocide penetration into the biofilm. The distinct effects of in situ biomineralization and particle deposition on biocide killing highlight the importance of understanding the mechanisms and patterns of biomineralization and scale formation to achieve successful biofilm control.
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32
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C. Gomes L, J. Mergulhão F. Effect of heterologous protein expression on <em>Escherichia coli</em> biofilm formation and biocide susceptibility. AIMS Microbiol 2016. [DOI: 10.3934/microbiol.2016.4.434] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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33
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Lindholm-Lehto PC, Knuutinen JS, Ahkola HSJ, Herve SH. Refractory organic pollutants and toxicity in pulp and paper mill wastewaters. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:6473-99. [PMID: 25647495 DOI: 10.1007/s11356-015-4163-x] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Accepted: 01/21/2015] [Indexed: 05/24/2023]
Abstract
This review describes medium and high molecular weight organic material found in wastewaters from pulp and paper industry. The aim is to review the versatile pollutants and the analysis methods for their determination. Among other pollutants, biocides, extractives, and lignin-derived compounds are major contributors to harmful effects, such as toxicity, of industrial wastewaters. Toxicity of wastewaters from pulp and paper mills is briefly evaluated including the methods for toxicity analyses. Traditionally, wastewater purification includes mechanical treatment followed by chemical and/or biological treatment processes. A variety of methods are available for the purification of industrial wastewaters, including aerobic and anaerobic processes. However, some fractions of organic material, such as lignin and its derivatives, are difficult to degrade. Therefore, novel chemical methods, including electrochemical and oxidation processes, have been developed for separate use or in combination with biological treatment processes.
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Affiliation(s)
- Petra C Lindholm-Lehto
- Department of Chemistry, University of Jyväskylä, P.O. Box 35, FI-40014, Jyväskylä, Finland,
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34
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Ebrahimi A, Hemati M, Shabanpour Z, Habibian Dehkordi S, Bahadoran S, Lotfalian S, Khubani S. Effects of benzalkonium chloride on planktonic growth and biofilm formation by animal bacterial pathogens. Jundishapur J Microbiol 2015; 8:e16058. [PMID: 25793094 PMCID: PMC4353024 DOI: 10.5812/jjm.16058] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Revised: 05/28/2014] [Accepted: 06/29/2014] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Resistance toward quaternary ammonium compounds (QACs) is widespread among a diverse range of microorganisms and is facilitated by several mechanisms such as biofilm formation. OBJECTIVES In this study, the effects of benzalkonium chloride on planktonic growth and biofilm formation by some field isolates of animal bacterial pathogens were investigated. MATERIALS AND METHODS Forty clinical isolates of Escherichia coli, Salmonella serotypes, Staphylococcus aureus and Streptococcus agalactiae (10 isolates of each) were examined for effects of benzalkonium chloride on biofilm formation and planktonic growth using microtiter plates. For all the examined strains in the presence of benzalkonium chloride, biofilm development and planktonic growth were affected at the same concentrations of disinfectant. RESULTS The means of strains growth increase after the minimal inhibitory concentration (MIC) were significant in all the bacteria (except for E. coli in 1/32 and S. agalactiae in of 1/8 MIC). Biofilm formation increased with decrease of antiseptics concentration; a significant increase was found in all the samples. The most turbidity related to S. aureus and the least to Salmonella. CONCLUSIONS Bacterial resistance against quaternary ammonium compounds is increasing which can increase the bacterial biofilm formation.
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Affiliation(s)
- Azizollah Ebrahimi
- Department of Pathobiology, School of Veterinary Sciences, Shahrekord University, Shahrekord, IR Iran
| | - Majid Hemati
- School of Veterinary Sciences, Shahrekord University, Shahrekord, IR Iran
- Corresponding author: Majid Hemati, School of Veterinary Sciences, Shahrekord University, Postal Code: 88186/34141, Shahrekord, IR Iran. Tel: +98-9352611155, Fax: +98-2634340470, E-mail:
| | - Ziba Shabanpour
- School of Veterinary Sciences, Shahrekord University, Shahrekord, IR Iran
| | - Saeed Habibian Dehkordi
- Department of Pathobiology, School of Veterinary Sciences, Shahrekord University, Shahrekord, IR Iran
| | - Shahab Bahadoran
- Department of Pathobiology, School of Veterinary Sciences, Shahrekord University, Shahrekord, IR Iran
| | - Sharareh Lotfalian
- Department of Pathobiology, School of Veterinary Sciences, Shahrekord University, Shahrekord, IR Iran
| | - Shahin Khubani
- School of Veterinary Sciences, Shahrekord University, Shahrekord, IR Iran
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Synthesis and Characterization of Cationic Surfactants Based on N-Hexamethylenetetramine as Active Microfouling Agents. J SURFACTANTS DETERG 2015. [DOI: 10.1007/s11743-014-1662-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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36
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Lemos M, Mergulhão F, Melo L, Simões M. The effect of shear stress on the formation and removal of Bacillus cereus biofilms. FOOD AND BIOPRODUCTS PROCESSING 2015. [DOI: 10.1016/j.fbp.2014.09.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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37
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Ruiz-Linares M, Ferrer-Luque CM, Arias-Moliz T, de Castro P, Aguado B, Baca P. Antimicrobial activity of alexidine, chlorhexidine and cetrimide against Streptococcus mutans biofilm. Ann Clin Microbiol Antimicrob 2014; 13:41. [PMID: 25139679 PMCID: PMC4236523 DOI: 10.1186/s12941-014-0041-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 08/03/2014] [Indexed: 11/17/2022] Open
Abstract
Background The use of antimicrobial solutions has been recommended to disinfect demineralized dentin prior to placing the filling material. The aim of this study was to evaluate the ability of several antimicrobials in controlling Streptococcus mutans (SM) biofilm formed in dentin. Methods Antimicrobial activity of 0.2% and 2% chlorhexidine (CHX), 0.2% cetrimide (CTR) and 0.2%, 0.5%, 1% and 2% alexidine (ALX) was assayed on 1-week SM biofilm formed on standardized coronal dentin blocks. Results of SM biofilm antimicrobial activity by different protocols were expressed as the kill percentage of biofilm and the term “eradication” was used to denote the kill of 100% of the bacterial population. To compare the efficacies of the different protocols the Student t test was used, previously subjecting data to the Anscombe transformation. Results All ALX concentrations tested and 0.2% CTR achieved a kill percentage higher than 99%, followed by 2% CHX with percentages above 96% (no statistically significant difference among them). Whereas 2% ALX and 0.2% CTR respectively showed eradication in 10 and 9 of the twelve specimens, 0.2% CHX did not produce eradication in any case. Conclusions The present study shows that, when used for one minute, 2% and 1% alexidine, and 0.2% cetrimide, achieve eradication of Streptococcus mutans biofilm in most specimens when applied to a dentin-volumetric model.
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Affiliation(s)
- Matilde Ruiz-Linares
- Department of Paediatric Dentistry, School of Dentistry, University of Granada, Campus de Cartuja, Colegio Máximo s/n, Granada, Spain.
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Rahmani-Badi A, Sepehr S, Mohammadi P, Soudi MR, Babaie-Naiej H, Fallahi H. A combination of cis-2-decenoic acid and antibiotics eradicates pre-established catheter-associated biofilms. J Med Microbiol 2014; 63:1509-1516. [PMID: 25082943 DOI: 10.1099/jmm.0.075374-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The catheterized urinary tract provides ideal conditions for the development of biofilm populations. Catheter-associated urinary tract infections (CAUTIs) are recalcitrant to existing antimicrobial treatments; therefore, established biofilms are not eradicated completely after treatment and surviving biofilm cells will carry on the infection. Cis-2-decenoic acid (CDA), an unsaturated fatty acid, is capable of inhibiting biofilm formation by Pseudomonas aeruginosa and of inducing the dispersion of established biofilms by multiple types of micro-organisms. Here, the ability of CDA to induce dispersal in pre-established single- and dual-species biofilms formed by Escherichia coli and Klebsiella pneumoniae was measured by using both semi-batch and continuous cultures bioassays. Removal of the biofilms by combined CDA and antibiotics (ciprofloxacin or ampicillin) was evaluated using microtitre plate assays (crystal violet staining). The c.f.u. counts were determined to assess the potential of combined CDA treatments to kill and eradicate pre-established biofilms formed on catheters. The effects of combined CDA treatments on biofilm surface area and bacteria viability were evaluated using fluorescence microscopy, digital image analysis and live/dead staining. To investigate the ability of CDA to prevent biofilm formation, single and mixed cultures were grown in the presence and absence of CDA. Treatment of pre-established biofilms with only 310 nM CDA resulted in at least threefold increase in the number of planktonic cells in all cultures tested. Whilst none of the antibiotics alone exerted a significant effect on c.f.u. counts and percentage of surface area covered by the biofilms, combined CDA treatments led to at least a 78% reduction in biofilm biomass in all cases. Moreover, most of the biofilm cells remaining on the surface were killed by antibiotics. The addition of 310 nM CDA significantly prevented biofilm formation by the tested micro-organisms, even within mixed cultures, indicating the ability of CDA to inhibit biofilm formation by other types of bacteria in addition to Pseudomonas aeruginosa. These findings suggested that the biofilm-preventive characteristics of CDA make it a noble candidate for inhibition of biofilm-associated infections such as CAUTIs, which paves the way toward developing new strategies to control biofilms in clinical as well as industrial settings.
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Affiliation(s)
| | | | | | | | | | - Hossein Fallahi
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
- Department of Biology, Razi University, Kermanshah, Iran
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Unsaturated fatty acid, cis-2-decenoic acid, in combination with disinfectants or antibiotics removes pre-established biofilms formed by food-related bacteria. PLoS One 2014; 9:e101677. [PMID: 25000301 PMCID: PMC4084997 DOI: 10.1371/journal.pone.0101677] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 06/09/2014] [Indexed: 11/19/2022] Open
Abstract
Biofilm formation by food-related bacteria and food-related pathogenesis are significant problems in the food industry. Even though much disinfection and mechanical procedure exist for removal of biofilms, they may fail to eliminate pre-established biofilms. cis-2 decenoic acid (CDA), an unsaturated fatty acid messenger produced by Pseudomonas aeruginosa, is reportedly capable of inducing the dispersion of established biofilms by multiple types of microorganisms. However, whether CDA has potential to boost the actions of certain antimicrobials is unknown. Here, the activity of CDA as an inducer of pre-established biofilms dispersal, formed by four main food pathogens; Staphylococcus aureus, Bacillus cereus, Salmonella enterica and E. coli, was measured using both semi-batch and continuous cultures bioassays. To assess the ability of CDA combined biocides treatments to remove pre-established biofilms formed on stainless steel discs, CFU counts were performed for both treated and untreated cultures. Eradication of the biofilms by CDA combined antibiotics was evaluated using crystal violet staining. The effect of CDA combined treatments (antibiotics and disinfectants) on biofilm surface area and bacteria viability was evaluated using fluorescence microscopy, digital image analysis and LIVE/DEAD staining. MICs were also determined to assess the probable inhibitory effects of CDA combined treatments on the growth of tested microorganisms' planktonic cells. Treatment of pre-established biofilms with only 310 nM CDA resulted in at least two-fold increase in the number of planktonic cells in all cultures. While antibiotics or disinfectants alone exerted a trivial effect on CFU counts and percentage of surface area covered by the biofilms, combinational treatments with both 310 nM CDA and antibiotics or disinfectants led to approximate 80% reduction in biofilm biomass. These data suggests that combined treatments with CDA would pave the way toward developing new strategies to control biofilms with widespread applications in industry as well as medicine.
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Trivedi PA, Parmar PR, Parikh PA. Spent FCC catalyst: Potential anti-corrosive and anti-biofouling material. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2013.07.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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41
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Cowle M, Babatunde A, Rauen W, Bockelmann-Evans B, Barton A. Biofilm development in water distribution and drainage systems: dynamics and implications for hydraulic efficiency. ACTA ACUST UNITED AC 2014. [DOI: 10.1080/09593330.2014.923517] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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42
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Electrospun antibacterial nanofibrous polyvinylpyrrolidone/cetyltrimethylammonium bromide membranes for biomedical applications. J BIOACT COMPAT POL 2014. [DOI: 10.1177/0883911514535153] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Nanoscale structures with large surface area-to-volume ratios are used as biomaterial scaffolds for vascular grafts, wound dressings, and air purifying filters. Using electrospinning, nanofibers containing an antibacterial agent, cetyltrimethylammonium bromide, were prepared for wound healing application. Polyvinylpyrrolidone, known as a biocompatible additive in food and drug industries, has been used as fiber processing agent with the organic active ingredient, cetyltrimethylammonium bromide. A series of samples with different polyvinylpyrrolidone/ cetyltrimethylammonium bromide ratios were successfully prepared by this method. The morphology and electroactive characteristics of nanofibers were investigated using scanning electron microscopy, atomic force microscopy, and electrochemical impedance spectroscopy. Fiber diameters and charge transfer resistances were found to decrease with salt content, while the double-layer capacitance increased with no apparent effect on the specific capacitance providing favorable conditions for the fabrication of biomaterials. In addition, the quaternary ammonium compound (cetyltrimethylammonium bromide) with a minimum ratio of 2.5 wt% showed reduction in bacterial activity of Klebsiella pneumonia, Staphylococcus aureus, and Escherichia coli.
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43
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Ebrahimi A, Hemati M, Habibian Dehkordi S, Bahadoran S, Khoshnood S, Khubani S, Dokht Faraj M, Hakimi Alni R. Chlorhexidine digluconate effects on planktonic growth and biofilm formation in some field isolates of animal bacterial pathogens. Jundishapur J Nat Pharm Prod 2014; 9:e14298. [PMID: 24872940 PMCID: PMC4036379 DOI: 10.17795/jjnpp-14298] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 10/15/2013] [Accepted: 12/21/2013] [Indexed: 11/25/2022] Open
Abstract
Background: To study chlorhexidine digluconate disinfectant effects on planktonic growth and biofilm formation in some bacterial field isolates from animals. Objectives: The current study investigated chlorhexidine digluconate effects on planktonic growth and biofilm formation in some field isolates of veterinary bacterial pathogens. Materials and Methods: Forty clinical isolates of Escherichia coli, Salmonella serotypes, Staphylococcus. aureus and Streptococcusagalactiae (10 isolates for each) were examined for chlorhexidine digluconate effects on biofilm formation and planktonic growth using microtiter plates. In all of the examined strains in the presence of chlorhexidine digluconate, biofilm development and planktonic growth were affected at the same concentrations of the disinfectant. Results: Chlorhexidine digluconate inhibited the planktonic growth of different bacterial species at sub-MICs. But they were able to induce biofilm development of the E. coli, Salmonella spp., S. aureus and Str. agalactiae strains. Conclusions: Bacterial resistance against chlorhexidine is increasing. Sub-MIC doses of chlorhexidine digluconate can stimulate the formation of biofilm strains.
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Affiliation(s)
- Azizollah Ebrahimi
- School of Veterinary Science, Shahrekord University, Shahrekord, IR Iran
| | - Majid Hemati
- School of Veterinary Science, Shahrekord University, Shahrekord, IR Iran
| | | | - Shahab Bahadoran
- School of Veterinary Science, Shahrekord University, Shahrekord, IR Iran
| | - Sheida Khoshnood
- School of Veterinary Science, Shahrekord University, Shahrekord, IR Iran
| | - Shahin Khubani
- School of Veterinary Science, Shahrekord University, Shahrekord, IR Iran
| | - Mahdi Dokht Faraj
- School of Veterinary Science, Shahrekord University, Shahrekord, IR Iran
| | - Reza Hakimi Alni
- Para-Veterinary Sciences, Bu-Ali Sina University, Hamedan, IR Iran
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Güngör ND, Kadaifçiler DG, Peker OÖ. Investigation of the bacterial load and antibiotic susceptibility of dental units. ENVIRONMENTAL MONITORING AND ASSESSMENT 2014; 186:1847-1853. [PMID: 24197558 DOI: 10.1007/s10661-013-3498-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Accepted: 10/23/2013] [Indexed: 06/02/2023]
Abstract
The aim of this study was to evaluate the bacterial contamination level and to determine the antibiotic susceptibility of the isolated bacteria from dental unit waterlines (DUWLs) in Istanbul. Bacterial quality of DUWLs is very important, as patients and dental staff are regularly exposed to water and aerosols generated by the unit. If opportunistic pathogens such as Staphylococcus aureus, Pseudomonas aeruginosa, and Legionella pneumophila are present in DUWLs, patient and dental staff can be infected. One hundred water samples were collected from high-speed drills and input waters from 50 dental units. Aerobic heterotrophic bacteria counts and the presence of Legionella, Pseudomonas, oral streptococci, and Staphylococcus were investigated in dental unit waters and aerosol samples. In addition, the antibiotic susceptibility of the isolated and identified bacteria from DUWLs was examined. This research found that 37 out of 50 dental unit water samples exceeded the American Dental Association's limit of 200 colony-forming units (CFU)/mL(-1). Legionella, oral streptococci, and S. aureus were not detected in any water or aerosol samples, but P. aeruginosa was isolated in three DUWLs. Also, Pseudomonas and Staphylococcus were found in water and aerosol samples. Cefoperazone, ofloxacin, gentamicin, ciprofloxacin, and piperacillin were the most effective antibiotics against the isolated bacteria from DUWLs.
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Affiliation(s)
- Nihal Dogruöz Güngör
- Department of Biology, Faculty of Science, Istanbul University, 34134, Vezneciler, Istanbul, Turkey,
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Perepelizin PV, Boltovskoy D. Effects of 254 nm UV irradiation on the mobility and survival of larvae of the invasive fouling mussel Limnoperna fortunei. BIOFOULING 2014; 30:197-202. [PMID: 24404869 DOI: 10.1080/08927014.2013.855726] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In order to investigate the feasibility of using ultraviolet (UV) irradiation to prevent the invasive Asian mussel, Limnoperna fortunei, from colonizing components of the cooling systems of industrial and power plants, the mobility and mortality of its larvae were assessed after exposure to different doses of UVC (λ = 254 nm) in laboratory conditions. Total (100%) mortality was achieved with a dose of 149 mJ cm(-2) at 23 °C and 103 mJ cm(-2) at 25.8 °C. Immediately after exposure, larvae were alive but had reduced mobility. The proportion of active larvae increased after 24 h, but fell again at 48 and 72 h to levels similar to those immediately after exposure. The highest mortality rates were always recorded at the last observation, 72 h after exposure. These results indicate that the larvae of L. fortunei are highly sensitive to UVC, suggesting that UV irradiation has the potential to control fouling by this mussel when the water is relatively clear. However, application of UV-based technologies in plants that use cooling water from water bodies with high loads of suspended solids (eg the Paraná-Uruguay basin, with ca 160 mg l(-1) of suspended solids and absorbance values around 0.255) is unlikely to be effective without prior filtration of the water.
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Affiliation(s)
- Pablo V Perepelizin
- a Museo Argentino de Ciencias Naturales 'Bernardino Rivadavia', CONICET , Buenos Aires , Argentina
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Araújo PA, Lemos M, Mergulhão F, Melo L, Simões M. The Influence of Interfering Substances on the Antimicrobial Activity of Selected Quaternary Ammonium Compounds. INTERNATIONAL JOURNAL OF FOOD SCIENCE 2013; 2013:237581. [PMID: 26904590 PMCID: PMC4745498 DOI: 10.1155/2013/237581] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 07/18/2013] [Accepted: 08/01/2013] [Indexed: 11/17/2022]
Abstract
Standard cleaning processes may not remove all the soiling typically found in food industry, such as carbohydrates, fats, or proteins. Contaminants have a high impact in disinfection as their presence may reduce the activity of disinfectants. The influence of alginic acid, bovine serum albumin, yeast extract, and humic acids was assessed on the antimicrobial activities of benzalkonium chloride and cetyltrimethyl ammonium bromide against Bacillus cereus vegetative cells and Pseudomonas fluorescens. The bacteria (single and consortium) were exposed to surfactants (single and combined) in the absence and presence of potential disinfection interfering substances. The antimicrobial effects of the surfactants were assessed based on the bacterial respiratory activity measured by oxygen uptake rate due to glucose oxidation. The tested surfactants were efficient against both bacteria (single and consortium) with minimum bactericidal concentrations ranging from 3 to 35 mg·L(-1). The strongest effect was caused by humic acids that severely quenched antimicrobial action, increasing the minimum bactericidal concentration of the surfactants on P. fluorescens and the consortium. The inclusion of the other interfering substances resulted in mild interferences in the antibacterial activity. This study clearly demonstrates that humic acids should be considered as an antimicrobial interfering substance in the development of disinfection strategies.
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Affiliation(s)
- Paula A. Araújo
- LEPAE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Madalena Lemos
- LEPAE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Filipe Mergulhão
- LEPAE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Luís Melo
- LEPAE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Manuel Simões
- LEPAE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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Taylor M, Ross K, Bentham R. Spatial arrangement of legionella colonies in intact biofilms from a model cooling water system. Microbiol Insights 2013; 6:49-57. [PMID: 24826074 PMCID: PMC3987755 DOI: 10.4137/mbi.s12196] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
There is disagreement among microbiologists about whether Legionella requires a protozoan host in order to replicate. This research sought to determine where in biofilm Legionellae are found and whether all biofilm associated Legionella would be located within protozoan hosts. While it is accepted that Legionella colonizes biofilm, its life cycle and nutritional fastidiousness suggest that Legionella employs multiple survival strategies to persist within microbial systems. Fluorescent in situ hybridization (FISH) and confocal laser scanning microscopy (CLSM) demonstrated an undulating biofilm surface architecture and a roughly homogenous distribution of heterotrophic bacteria with clusters of protozoa. Legionella displayed 3 distinct spatial arrangements either contained within or directly associated with protozoa, or dispersed in loosely associated clusters or in tightly packed aggregations of cells forming dense colonial clusters. The formation of discreet clusters of tightly packed Legionella suggests that colony formation is influenced by specific environmental conditions allowing for limited extracellular replication. This work represents the first time that an environmentally representative, multispecies biofilm containing Legionella has been fluorescently tagged and Legionella colony morphology noted within a complex microbial system.
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Affiliation(s)
- Michael Taylor
- School of the Environment, Flinders University of South Australia, Adelaide, Australia
| | - Kirstin Ross
- School of the Environment, Flinders University of South Australia, Adelaide, Australia
| | - Richard Bentham
- School of the Environment, Flinders University of South Australia, Adelaide, Australia
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Montresor LC, Miranda-Filho KC, Paglia A, Luz DMR, Araújo JM, dos S Silva MJ, Gerhard L, Martinez CB, Vidigal THDA. Short-term toxicity of ammonia, sodium hydroxide and a commercial biocide to golden mussel Limnoperna fortunei (Dunker, 1857). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2013; 92:150-154. [PMID: 23582994 DOI: 10.1016/j.ecoenv.2013.03.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 03/16/2013] [Accepted: 03/18/2013] [Indexed: 06/02/2023]
Abstract
Macrofouling bivalves are considered an ecological and technological problem worldwide. Control measures have been researched with Limnoperna fortunei, but without success. The aim of the manuscript is to test some alternatives to regulate this harmful invasive mollusk. Mortality and behavioral response (shell gaping) of Limnoperna fortunei exposed to three chemical compounds were evaluated. Values for LC50 96h were: 0.25 (0.24-0.27)mg/L NH3-N, 11.10 (7.45-16.55) mg/L MXD-100 and 88.51 (74.61-105.01)mg/L NaOH. Reduced gaping was observed beginning at concentrations of 0.31mg/L (NH3-N), 100mg/L (MXD-100) and 160mg/L (NaOH) and increased above these values. The percentage of individuals gaping after two hours at LC50 96h differed significantly (χ(2)=79.9; DF=3; p<0.001) in MXD-100 (50%), NaOH (0%), NH3-N (96.7%) and the controls (93.3%). This study contributes to the understanding of the relationship between toxicity and behavioral effects of some toxicants in L. fortunei.
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Affiliation(s)
- Lângia C Montresor
- Laboratório de Malacologia, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Rio de Janeiro, RJ, Brasil, CEP 21.040-900
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Ringeard JM, Griesmar P, Caplain E, Michiel M, Serfaty S, Huerou JYL, Marinkova D, Yotova L. Design of poly(N-acryloylglycine) materials for incorporation of microorganisms. J Appl Polym Sci 2013. [DOI: 10.1002/app.39242] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jean-Marie Ringeard
- Laboratoire Systèmes et Applications des Technologies de l'Information et de l'Energie; Université de Cergy-Pontoise; ENS Cachan, UMR CNRS 8029, Cergy-Pontoise F-95000 France
| | - Pascal Griesmar
- Laboratoire Systèmes et Applications des Technologies de l'Information et de l'Energie; Université de Cergy-Pontoise; ENS Cachan, UMR CNRS 8029, Cergy-Pontoise F-95000 France
| | - Emmanuel Caplain
- Laboratoire Systèmes et Applications des Technologies de l'Information et de l'Energie; Université de Cergy-Pontoise; ENS Cachan, UMR CNRS 8029, Cergy-Pontoise F-95000 France
| | - Magalie Michiel
- Laboratoire Systèmes et Applications des Technologies de l'Information et de l'Energie; Université de Cergy-Pontoise; ENS Cachan, UMR CNRS 8029, Cergy-Pontoise F-95000 France
| | - Stéphane Serfaty
- Laboratoire Systèmes et Applications des Technologies de l'Information et de l'Energie; Université de Cergy-Pontoise; ENS Cachan, UMR CNRS 8029, Cergy-Pontoise F-95000 France
| | - Jean-Yves Le Huerou
- Laboratoire Systèmes et Applications des Technologies de l'Information et de l'Energie; Université de Cergy-Pontoise; ENS Cachan, UMR CNRS 8029, Cergy-Pontoise F-95000 France
| | - Desislava Marinkova
- Department of Biotechnology; University of Chemical Technology and Metallurgy; Sofia BG-1756 Bulgaria
| | - Lyubov Yotova
- Department of Biotechnology; University of Chemical Technology and Metallurgy; Sofia BG-1756 Bulgaria
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