Biofouling最新文献

{"title":"Ozonized water as a promising strategy to remove biofilm formed by <i>Pseudomonas</i> spp. on polyethylene and polystyrene surfaces.","authors":"Tatiane Marques Santos, Maria Eduarda Teixeira Lopes, Ernandes Rodrigues de Alencar, Marcus Vinícius de Assis Silva, Solimar Gonçalves Machado","doi":"10.1080/08927014.2024.2444387","DOIUrl":"10.1080/08927014.2024.2444387","url":null,"abstract":"<p><p>The dairy industry faces challenges in controlling spoilage microorganisms, particularly <i>Pseudomonas</i>, known to form resilient biofilms. Conventional disinfection methods have limitations, prompting the exploration of eco-friendly alternatives like ozone. This study focused on <i>Pseudomonas</i> biofilms on polystyrene and polyethylene surfaces, evaluating ozone efficacy when incorporated into different water sources and applied under static and dynamic conditions. Biofilm formation and removal were assessed with conventional microbiological and microscopic techniques. Despite variations in physicochemical properties, ozonized water from different sources showed similar effectiveness in removing <i>Pseudomonas</i> biofilms. Dynamic ozone application was more efficient, achieving a 2.35 log CFU/coupon reduction on polyethylene surfaces, compared to a 1.05 log CFU/coupon reduction under static conditions. These findings highlight the potential of ozonized water for removing <i>Pseudomonas</i> biofilms, especially under dynamic application. This eco-friendly approach could serve as an effective strategy to mitigate biofilm-related challenges in the dairy industry.</p>","PeriodicalId":8898,"journal":{"name":"Biofouling","volume":" ","pages":"144-156"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143021736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thiosemicarbazones and analogues as potential biofilm inhibitors of <i>Candida albicans</i>.","authors":"Carolina do Rosário Esteves Guimarães, Danilo Santana Galvão, Silvio do Desterro Cunha, Humberto Fonseca de Freitas, Tânia Fraga Barros","doi":"10.1080/08927014.2025.2457151","DOIUrl":"10.1080/08927014.2025.2457151","url":null,"abstract":"<p><p>Biofilms are a virulence factor for <i>Candida albicans</i>, a common pathogen in human fungal infections, making them resistant to many commercial antifungals. Therefore, the discovery of compounds that inhibit and eradicate biofilms is a priority. As thiosemicarbazones have had their effect on <i>Candida</i> biofilms little explored, this study investigated the inhibitory and eradication activity of 30 thiosemicarbazones and analogues against <i>C. albicans</i> biofilms. After initial screening, four compounds were selected and compound 28 emerged as the most potent with BIC₅₀ at 31.55 ± 1.18 µM. By scanning electron microscopy analysis, blastoconidia adhered to the reduced surface and reduced formation of pseudohyphae and hyphae was revealed. Despite the inhibitory activity, the four compounds failed to eradicate the biofilm by more than 50%. Thus, the results suggest that the compounds evaluated are very promising for the development of effective antibiofilm compounds and open up new perspectives for elucidating the mechanism of action.</p>","PeriodicalId":8898,"journal":{"name":"Biofouling","volume":" ","pages":"197-210"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143187916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the potential of hydrolytic enzymes combined with antibacterial agents to disrupt pathogenic biofilms and disinfect released cells.","authors":"Patricia Palafox-Rivera, Melvin R Tapia-Rodriguez, Julio Cesar Lopez-Romero, Marco A Lugo-Flores, Karen P Quintero-Cabello, Brenda A Silva-Espinoza, M Reynaldo Cruz-Valenzuela, Filomena Nazzaro, J Fernando Ayala-Zavala","doi":"10.1080/08927014.2024.2435018","DOIUrl":"10.1080/08927014.2024.2435018","url":null,"abstract":"<p><p>Biofilms are bacterial communities encapsulated in a self-produced extracellular polymeric matrix comprising carbohydrates, proteins, lipids, and DNA. This matrix provides structural integrity while significantly enhancing bacterial antibiotic resistance, presenting substantial disinfection challenges. The persistence of biofilm-associated infections and foodborne outbreaks underscores the need for more effective disinfection strategies. Conventional antibacterial agents often are less effective against biofilm-protected cells compared to their efficacy against planktonic (non-attached) bacteria. Integrating hydrolytic enzymes, such as cellulases, proteases, and DNases, into disinfection protocols offers a promising approach by breaking down the biofilm matrix to expose the bacteria. However, the follow-up use of antibacterial agents is important, as enzymes alone do not possess bactericidal properties. Unlike traditional disinfectants, natural antibacterial agents work synergistically with enzymes, enhancing biofilm disruption without compromising the enzymatic activity through oxidation. This review offers a comprehensive analysis of the current knowledge and potential of combining hydrolytic enzymes with disinfectants to disrupt biofilms and eradicate the released bacterial cells, emphasizing applications for clinical and foodborne pathogens.</p>","PeriodicalId":8898,"journal":{"name":"Biofouling","volume":" ","pages":"131-143"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142930461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antibacterial and antibiofilm efficacy of quercetin against <i>Pseudomonas aeruginosa</i> and methicillin resistant <i>Staphylococcus aureus</i> associated with ICU infections.","authors":"Kalidass Vijayakumar, Vinitha Ganesan, Suganya Kannan","doi":"10.1080/08927014.2025.2460491","DOIUrl":"10.1080/08927014.2025.2460491","url":null,"abstract":"<p><p>Infections caused by multidrug-resistant pathogens, particularly in ICU settings, pose significant health risks globally. <i>Pseudomonas aeruginosa</i> (PA) and methicillin-resistant <i>Staphylococcus aureus</i> (MRSA) are prominent nosocomial pathogens among the ESKAPE group, known for their resistance mechanisms such as biofilm formation and quorum sensing. Quercetin, a flavonoid found in fruits and vegetables, exhibits diverse pharmacological properties, including antimicrobial activity. This study evaluated quercetin's efficacy against PA and MRSA through <i>in vitro</i> and <i>in vivo</i> experiments. Minimum Inhibitory Concentration (MIC) assays showed MIC values of 158 µg mL^-1 for PA and 176 µg mL^-1 for MRSA. Quercetin inhibited PA's swarming motility at concentrations as low as 39.5 µg mL^-1 and reduced MRSA viability in serum by up to 79%. Quercetin treatment significantly reduced biofilm formation by both pathogens, with <i>Pseudomonas aeruginosa</i> showing biomass reductions of 23% at 1/4 MIC (39.5 µg mL^-1) and 48% at 1/2 MIC, while methicillin-resistant <i>Staphylococcus aureus</i> exhibited reductions of 27% at 1/4 MIC and 53% at 1/2 MIC compared to the control. High-content fluorescence imaging demonstrated quercetin's ability to disrupt biofilm structure and viability. Moreover, quercetin suppressed EPS production and protease activity in both PA and MRSA, alongside downregulating virulence-related genes involved in quorum sensing and toxin production. <i>In vivo</i> studies using <i>Caenorhabditis elegans</i> confirmed quercetin's ability to reduce bacterial adherence and colonization. These findings underscore quercetin's potential as a therapeutic agent against multidrug-resistant pathogens in ICU settings, warranting further exploration for clinical applications.</p>","PeriodicalId":8898,"journal":{"name":"Biofouling","volume":" ","pages":"211-224"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143187979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anti-biofouling marine diterpenoids from Okinawan soft corals.","authors":"Shinnosuke Ishigami, Ryoma Nakagawa, Fumiya Yagi, Hikaru Takada, Ayano Suzuki, Takashi Kamada, Kazumi Nimura, Iori Oshima, Chin-Soon Phan, Takahiro Ishii","doi":"10.1080/08927014.2024.2443029","DOIUrl":"https://doi.org/10.1080/08927014.2024.2443029","url":null,"abstract":"<p><p>Soft corals produce a diverse range of natural products with pharmaceutical potential, such as antiproliferative and anti-inflammatory effects. The Alcyoniidae family, particularly the genera <i>Sarcophyton</i> and <i>Sinularia</i>, is rich in bioactive terpenoids. However, despite extensive research, their anti-biofouling properties against the mussel <i>Mytilus galloprovincialis</i> remain underexplored. This study investigates these compounds as potential eco-friendly antifouling agents. A new cembrane-type diterpenoid, 11,12-epoxycembrene A (<b>1</b>), and 15 known compounds were isolated from three soft corals distributed in Okinawa, Japan. The chemical structures of these secondary metabolites were elucidated based on spectroscopic analysis. Moreover, an anti-biofouling assay of potential anti-biofouling agents against <i>M. galloprovincialis</i> was performed and their toxicities were assessed by means of the brine shrimp mortality test. In conclusion, this study identifies new and known bioactive compounds from soft corals, introduces an improved anti-biofouling assay, and highlights the potential of dimethylamine-containing diterpenes as environmentally friendly antifouling agents.</p>","PeriodicalId":8898,"journal":{"name":"Biofouling","volume":" ","pages":"1-10"},"PeriodicalIF":2.6,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142913803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inhibition of <i>Salmonella</i> Typhimurium biofilm and polysaccharide production via eugenol-glucosyltransferase interactions.","authors":"Julian Javier Palomares-Navarro, Ariadna Thalia Bernal-Mercado, Cristóbal Joel González-Pérez, Miguel Angel Martínez-Tellez, Gustavo Adolfo Gonzalez-Aguilar, Luis Alberto Ortega-Ramirez, Jesus Fernando Ayala-Zavala","doi":"10.1080/08927014.2024.2446928","DOIUrl":"https://doi.org/10.1080/08927014.2024.2446928","url":null,"abstract":"<p><p>This study hypothesizes that eugenol, due to its structural properties, can inhibit glucosyltransferase activity, thereby reducing polysaccharide synthesis in <i>Salmonella</i> Typhimurium biofilms. It was found that eugenol exhibited minimum inhibitory and bactericidal concentrations of 0.6 mg mL^-1 and 0.8 mg mL^-1, respectively, against planktonic <i>S.</i> Typhimurium growth. It also demonstrated minimum biofilm eradication and inhibition concentrations of 1.8 mg mL^-1 and 0.7 mg mL^-1, respectively. At 0.3 mg mL^-1, eugenol reduced biofilm formation and affected polysaccharide production. Moreover, eugenol reduced glucosyltransferase activity. Computational analysis indicated strong interactions between eugenol and the enzyme's active site residues with affinity energy -8.5 kcal mol^-1. Real-time PCR revealed a significant increase in <i>bcsA</i> gene expression in the presence of eugenol. These findings suggest that eugenol's ability to inhibit glucosyltransferase activity effectively reduces biofilm formation and polysaccharide content.</p>","PeriodicalId":8898,"journal":{"name":"Biofouling","volume":" ","pages":"1-18"},"PeriodicalIF":2.6,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142913805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quorum quenching effects of linoleic and stearic acids on outer membrane vesicle-mediated virulence in <i>Chromobacterium violaceum</i>.","authors":"Venkatramanan Mahendrarajan, Nalini Easwaran","doi":"10.1080/08927014.2024.2446930","DOIUrl":"https://doi.org/10.1080/08927014.2024.2446930","url":null,"abstract":"<p><p><i>Chromobacterium violaceum</i> is a pathogenic bacterium that can infect humans and animals, yet the role of its outer membrane vesicles (OMVs) in mediating pathogenicity remains underexplored. This study evaluated the effects of linoleic acid (LA) and stearic acid (SA) on quorum sensing (QS)-mediated violacein production, biofilm formation, and OMV biogenesis in <i>C. violaceum</i>. Our findings revealed that 2 mM LA and 1 mM SA effectively quench QS, leading to a significant reduction in violacein production, biofilm formation, and OMV biogenesis. Gene expression analysis confirmed the downregulation of QS-related genes, including <i>cviI</i>, <i>cviR</i>, <i>vioA</i>, <i>vioB</i>, and <i>vioC</i>, in fatty acid-treated <i>C. violaceum</i>. Additionally, we assessed the antimicrobial activity of <i>C. violaceum</i>-derived OMVs on <i>Rhizobium sp.</i>, a PGPR and observed a marked reduction in bactericidal activity in the treated OMVs. This study suggests that LA and SA have potential as anti-infective agents to mitigate OMV-mediated virulence and combat antibiotic resistance in pathogens.</p>","PeriodicalId":8898,"journal":{"name":"Biofouling","volume":" ","pages":"1-11"},"PeriodicalIF":2.6,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142891850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of magnetically treated water on the survival of bacteria in biofilms.","authors":"Aidan R Foster, Erika R Stark, Luisa A Ikner, Ian L Pepper","doi":"10.1080/08927014.2024.2444379","DOIUrl":"https://doi.org/10.1080/08927014.2024.2444379","url":null,"abstract":"<p><p>The goal of this study was to evaluate if a magnetic water treatment device could be used to mitigate biofilms in water systems. Magnetic treatment was applied to water upstream of a modified Robbins device in which <i>Pseudomonas fluorescence</i> biofilms were formed. Duration of magnetic treatment, system flow rate, and field strength were varied to assess the impacts on the biofilm. A control system was concurrently established in which no magnetic treatment was applied. After treatment, the number of viable cells in the biofilm was reduced by up to 2.46 log₁₀ CFU cm^-2 depending on the operational conditions. Increased cell stress, and ultimately death, was observed during treatment as indicated by an elevated AMPi stress index. These results indicate that magnetic water treatment may be an effective technology to decrease the extent of biofilms in water systems and a reduced need for chemical treatment. A mechanism is proposed in which metabolic processes are hindered due to the magnetic field effects on ions in the water. However, a mechanistic investigation remains outside the scope of this study. Future studies should aim to characterize both the impacts of treatment on the matrix and cellular processes to determine a mechanism for the observed effects.</p>","PeriodicalId":8898,"journal":{"name":"Biofouling","volume":" ","pages":"1-13"},"PeriodicalIF":2.6,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142891849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel HEMA copolymer hydrogel with antifouling and anti-inflammatory activity as a promising medical device coating layer to prevent microbial adhesion.","authors":"Hadeel Abu Mahfouz, Ola Tarawneh, Lama Hamadneh, Muayad Esaifan, Sameer Al-Kouz, Ala A Alhusban, Mohammad Abu-Sini, Lana Hamdan, Buthaina Hussein, Mohammad Hailat","doi":"10.1080/08927014.2024.2442011","DOIUrl":"https://doi.org/10.1080/08927014.2024.2442011","url":null,"abstract":"<p><p>Compared to antimicrobial agents, anti-adhesive surfaces can reduce bacteria adhesion and biofilm formation in catheters, providing better selectivity, efficiency, and device life span. In this research, novel anionic surface biomaterials were created and tested to reduce microbial adhesion and colonization in medical device coating. Maleic anhydride (MA) was polymerized with 2-HEMA in varying amounts to produce a p(HEMA-<i>co</i>-MA) hydrogel copolymer. Fourier transforms infrared characterization (ATR-FTIR), thermal analysis, scanning electron microscopy with energy-dispersive X-ray spectroscopy, swelling capacity, cytotoxicity evaluation, and mixed biofilm formation ability were used to characterize the copolymer hydrogels. Hydrogels were evaluated by considering the guidance and regulations of ISO and ASTM standards. The polymers were dense, had stable cross-linking between both monomers, were non-toxic to the Human Embryonic Kidney (HEK) 293 cell line, and reduced bacterial biofilm formation statistically significantly. Furthermore, increasing the amount of MA affected <i>TGF-1</i> gene expression, where the gene expression was significantly elevated, especially at the highest percentage of MA. Furthermore, the high percentage of MA in the polymer improved the new polymer's thermal properties, film flexibility, and swelling capacity. These novel polymers could be promising materials for improving catheter biomaterial properties and modifying the surfaces of designated devices to reduce microbial infections and growth.</p>","PeriodicalId":8898,"journal":{"name":"Biofouling","volume":" ","pages":"1-11"},"PeriodicalIF":2.6,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142876051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Zerumbone disrupts mixed biofilms of <i>Candida albicans</i> and <i>Streptococcus mutans</i> on acrylic resin.","authors":"Ana Luíza Gorayb Pereira, César Augusto Abreu Pereira, Luana Mendonça Dias, Janaína Habib Jorge, Ana Cláudia Pavarina","doi":"10.1080/08927014.2024.2441259","DOIUrl":"https://doi.org/10.1080/08927014.2024.2441259","url":null,"abstract":"<p><p>The efficacy of Zerumbone (ZER) against mixed biofilms of fluconazole-resistant <i>Candida albicans</i> (ATCC 96901) and <i>Streptococcus mutans</i> (UA159) was evaluated. Biofilms were cultivated on acrylic resin specimens for 48 h, with alternating supplementation of glucose and sucrose. ZER's ability to inhibit biofilm formation (pre-treatment) and eradicate mature biofilms (post-treatment) was assessed. Control groups were treated with Chlorhexidine (CHX), Nystatin (NYS), Penicillin (ATB), and distilled water. The efficacy was measured by colony forming units (CFU/mm²) counts, biomass and biofilm's matrix components quantification (water-soluble polysaccharides [WSP], alkali-soluble polysaccharides [ASPs], proteins, and extracellular DNA [eDNA]). Data were analyzed by one-way ANOVA with Tukey's or Gammes-Howell post-hoc test for normal data and Kruskal-Wallis test for data that did not meet the assumption of normality (α = 0,05). In the biofilm inhibition assay, ZER decreased total microbiota (<i>C. albicans</i> + <i>S. mutans</i>) (2.7 log₁₀; <i>p</i> < 0.005), <i>C. albicans</i> (1.4 log₁₀; <i>p</i> < 0.038) and <i>S. mutans</i> (1.9 log₁₀; <i>p</i> < 0.048) counting (vs control group), and biofilm components [insoluble proteins: 37% (<i>p</i> < 0.001); WSP: 13% (<i>p</i> < 0.042); ASP: 46% (<i>p</i> < 0.001); eDNA: 11% (<i>p</i> < 0.048)]. Post-treatment with ZER reduced total microbiota (3.2 log₁₀; <i>p</i> < 0.001), <i>C. albicans</i> (3 log₁₀; <i>p</i> < 0.001) and <i>S. mutans</i> (2 log₁₀; <i>p</i> < 0.001) counting (vs control group), and biofilm components [soluble proteins: 20% (<i>p</i> < 0.001); WSP: 20% (<i>p</i> < 0.001); ASP: 51% (<i>p</i> < 0.001); and eDNA: 33% (<i>p</i> < 0.001)]. The positive control groups demonstrated similar or lower efficacy than ZER under all experimental conditions. ZER demonstrates efficacy against mixed biofilms by reducing <i>C. albicans</i> and <i>S. mutans</i> counting and disrupting the extracellular matrix in both assays.</p>","PeriodicalId":8898,"journal":{"name":"Biofouling","volume":" ","pages":"1-16"},"PeriodicalIF":2.6,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}