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Journal articles on the topic 'Initial Biofilm'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Dige, I., M. K. Raarup, J. R. Nyengaard, M. Kilian, and B. Nyvad. "Actinomyces naeslundii in initial dental biofilm formation." Microbiology 155, no. 7 (2009): 2116–26. http://dx.doi.org/10.1099/mic.0.027706-0.

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The combined use of confocal laser scanning microscopy (CLSM) and fluorescent in situ hybridization (FISH) offers new opportunities for analysis of the spatial relationships and temporal changes of specific members of the microbiota of intact dental biofilms. The purpose of this study was to analyse the patterns of colonization and population dynamics of Actinomyces naeslundii compared to streptococci and other bacteria during the initial 48 h of biofilm formation in the oral cavity. Biofilms developed on standardized glass slabs mounted in intra-oral appliances worn by ten individuals for 6,

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2

Mirzaei, Rasoul, Davide Campoccia, Stefano Ravaioli, and Carla Renata Arciola. "Emerging Issues and Initial Insights into Bacterial Biofilms: From Orthopedic Infection to Metabolomics." Antibiotics 13, no. 2 (2024): 184. http://dx.doi.org/10.3390/antibiotics13020184.

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Bacterial biofilms, enigmatic communities of microorganisms enclosed in an extracellular matrix, still represent an open challenge in many clinical contexts, including orthopedics, where biofilm-associated bone and joint infections remain the main cause of implant failure. This study explores the scenario of biofilm infections, with a focus on those related to orthopedic implants, highlighting recently emerged substantial aspects of the pathogenesis and their potential repercussions on the clinic, as well as the progress and gaps that still exist in the diagnostics and management of these infe

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Thormann, Kai M., Renée M. Saville, Soni Shukla, Dale A. Pelletier, and Alfred M. Spormann. "Initial Phases of Biofilm Formation in Shewanella oneidensis MR-1." Journal of Bacteriology 186, no. 23 (2004): 8096–104. http://dx.doi.org/10.1128/jb.186.23.8096-8104.2004.

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ABSTRACT Shewanella oneidensis MR-1 is a facultative Fe(III)- and Mn(IV)-reducing microorganism and serves as a model for studying microbially induced dissolution of Fe or Mn oxide minerals as well as biogeochemical cycles. In soil and sediment environments, S. oneidensis biofilms form on mineral surfaces and are critical for mediating the metabolic interaction between this microbe and insoluble metal oxide phases. In order to develop an understanding of the molecular basis of biofilm formation, we investigated S. oneidensis biofilms developing on glass surfaces in a hydrodynamic flow chamber

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Widyarman, Armelia Sari, Triska Ramajayanti, and Citra Fragrantia Theodorea. "Indonesian Strain of Lactobacillus reuteri Probiotic Reduces the Initial Biofilm Colonization." Open Dentistry Journal 14, no. 1 (2020): 544–53. http://dx.doi.org/10.2174/1874210602014010544.

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Background: The benefits of probiotics for human health have long been proven. Probiotic Lactobacillus reuteri, can produce a beneficial broad-spectrum antibacterial compound called reuterin by metabolizing glycerol. Objective: The aim of the study was to investigate the effect of the Indonesian strain of L. reuteri LC382415 on mono- and dual-species Streptococcus mutans and Streptococcus sanguinis biofilms in vitro. Methods: Streptococcus mutans and S. sanguinis were cultured in BHI broth. Lactobacillus reuteri LC382415 was inoculated on MRS agar. The different concentrations effect of L. reu

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Mat Jalil, Mohd Taufiq, and Darah Ibrahim. "Fungal Extract of Lasiodiplodia pseudotheobromae IBRL OS-64 Inhibits the Growth of Skin Pathogenic Bacterium and Attenuates Biofilms of Methicillin-Resistant Staphylococcus aureus." Malaysian Journal of Medical Sciences 28, no. 4 (2021): 24–36. http://dx.doi.org/10.21315/mjms2021.28.4.4.

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Background: The emergence of multidrug-resistant pathogens associated with biofilm formation can cause life-threatening infections to humans. Therefore, the present study aims to evaluate the effects of the fungal extract of Lasiodiplodia pseudotheobromae (L. pseudotheobromae) Industrial Biotechnology Research Laboratory (IBRL) OS-64 on bacterial cells and the biofilm formation of methicillin-resistant Staphylococcus aureus (MRSA). Methods: Broth microdilution and semi-quantitative adherence assays were conducted to determine the anti-biofilm activity of the fungal extract. Light and scanning

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Gomes, Inês B., Madalena Lemos, Susana Fernandes, Anabela Borges, Lúcia C. Simões, and Manuel Simões. "The Effects of Chemical and Mechanical Stresses on Bacillus cereus and Pseudomonas fluorescens Single- and Dual-Species Biofilm Removal." Microorganisms 9, no. 6 (2021): 1174. http://dx.doi.org/10.3390/microorganisms9061174.

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Biofilm control is mainly based on chemical disinfection, without a clear understanding of the role of the biocides and process conditions on biofilm removal. This study aims to understand the effects of a biocide (benzyldimethyldodecyl ammonium chloride—BDMDAC) and mechanical treatment (an increase of shear stress -τw) on single- and dual-species biofilms formed by Bacillus cereus and Pseudomonas fluorescens on high-density polyethene (HDPE). BDMDAC effects were initially assessed on bacterial physicochemical properties and initial adhesion ability. Then, mature biofilms were formed on a rota

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7

Fysun, Olga, Alen Maher, Holger Brehm, Bernd Wilke, and Horst Christian Langowski. "Monitoring of Biofilm Development on Surfaces Using an Electrochemical Method." Solid State Phenomena 262 (August 2017): 492–95. http://dx.doi.org/10.4028/www.scientific.net/ssp.262.492.

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Bioleaching is the extraction of metals from ore by microorganisms. Initial attachment and formation of biofilm by microorganisms are very important for the bioleaching due to the mineral oxidation processes. However, very few techniques were proposed to monitor initial stage of biofilms in real time. Therefore, the aim of this work was to probe an electrochemical method on the bacterial biofilm model under the laboratory conditions. It was found that electrochemical method can be suggested for the real time detection of initial phase of P. polymyxa biofilm formation by observation of the pote

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Ayush, Purevdash Tsend, Je-Hyeon Ko, and Hyun-Suk Oh. "Characteristics of Initial Attachment and Biofilm Formation of Pseudomonas aeruginosa on Microplastic Surfaces." Applied Sciences 12, no. 10 (2022): 5245. http://dx.doi.org/10.3390/app12105245.

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The toxic effect of microplastics on living organisms is emerging as a serious environmental issue nowadays. The biofilm formed on their surface by microorganisms can further increase the toxicity, but the mechanism of biofilm formation on microplastics is not yet fully understood because of the complexities of other factors. This study aimed to identify the factors with an important influence on biofilm formation on microplastic surfaces. The microtiter plate assay was used to evaluate the biofilms formed by Pseudomonas aeruginosa PAO1, a model microorganism, on four types of microplastics, i

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Ma, Guoxiang, Yu Ding, Qingping Wu, et al. "Yersinia enterocolitica-Derived Outer Membrane Vesicles Inhibit Initial Stage of Biofilm Formation." Microorganisms 10, no. 12 (2022): 2357. http://dx.doi.org/10.3390/microorganisms10122357.

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Yersinia enterocolitica (Y. enterocolitica) is an important food-borne and zoonotic pathogen. It can form biofilm on the surface of food, increasing the risk to food safety. Generally, outer membrane vesicles (OMVs) are spherical nanostructures secreted by Gram-negative bacteria during growth. They play a role in biological processes because they contain biologically active molecules. Several studies have reported that OMVs secreted by various bacteria are associated with the formation of biofilms. However, the interactions between Y. enterocolitica OMVs and biofilm are unknown. This study aim

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Kay, Walker, Connor Hunt, Lisa Nehring, Brian Barnum, Nicholas Ashton, and Dustin Williams. "Biofilm Growth on Simulated Fracture Fixation Plates Using a Customized CDC Biofilm Reactor for a Sheep Model of Biofilm-Related Infection." Microorganisms 10, no. 4 (2022): 759. http://dx.doi.org/10.3390/microorganisms10040759.

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Most animal models of infection utilize planktonic bacteria as initial inocula. However, this may not accurately mimic scenarios where bacteria in the biofilm phenotype contaminate a site at the point of injury. We developed a modified CDC biofilm reactor in which biofilms can be grown on the surface of simulated fracture fixation plates. Multiple reactor runs were performed and demonstrated that monomicrobial biofilms of a clinical strain of methicillin-resistant Staphylococcus aureus, S. aureus ATCC 6538, and Pseudomonas aeruginosa ATCC 27853 consistently developed on fixation plates. We als

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Lewandowski, Z., H. Beyenal, and D. Stookey. "Reproducibility of biofilm processes and the meaning of steady state in biofilm reactors." Water Science and Technology 49, no. 11-12 (2004): 359–64. http://dx.doi.org/10.2166/wst.2004.0880.

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The need for reproducing biofilm processes is undisputable - the quality of biofilm research depends on this reproducibility. However, as many biofilm researchers know, long-term biofilm processes are notoriously difficult to reproduce. To avoid problems related to biofilm reproducibility two strategies are used: (1) to study very young biofilms that have accumulated for a few hours to a few days only, and (2) to run biofilm experiments only once. The first approach trades reproducibility for relevance because natural biofilms are usually older, often much older than a few days. This approach

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Ong, Jemi, Rose Godfrey, Brad Isaacson, Paul Pasquina, and Dustin Williams. "Determining the Antibiofilm Efficacy of Oregano Gel in an Ex Vivo Model of Percutaneous Osseointegrated Implants." Microorganisms 10, no. 11 (2022): 2133. http://dx.doi.org/10.3390/microorganisms10112133.

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Biofilm contamination is common in patients with percutaneous osseointegrated (OI) implants, leading to frequent infections, irritation, and discomfort. Reported infection rates soar up to 65% as the recalcitrant nature of biofilms complicates treatment. There is persistent need for therapies to manage biofilm burden. In response, we formulated and tested oregano essential oil in a topical gel as a potential biofilm management therapy. We developed an ex vivo system based on an established ovine OI implant model with Staphylococcus aureus ATCC 6538 biofilms as initial inocula. Gel was administ

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Drescher, Knut, Jörn Dunkel, Carey D. Nadell, et al. "Architectural transitions in Vibrio cholerae biofilms at single-cell resolution." Proceedings of the National Academy of Sciences 113, no. 14 (2016): E2066—E2072. http://dx.doi.org/10.1073/pnas.1601702113.

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Many bacterial species colonize surfaces and form dense 3D structures, known as biofilms, which are highly tolerant to antibiotics and constitute one of the major forms of bacterial biomass on Earth. Bacterial biofilms display remarkable changes during their development from initial attachment to maturity, yet the cellular architecture that gives rise to collective biofilm morphology during growth is largely unknown. Here, we use high-resolution optical microscopy to image all individual cells in Vibrio cholerae biofilms at different stages of development, including colonies that range in size

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Fischer, M., G. Friedrichs, and T. Lachnit. "Fluorescence-Based Quasicontinuous andIn SituMonitoring of Biofilm Formation Dynamics in Natural Marine Environments." Applied and Environmental Microbiology 80, no. 12 (2014): 3721–28. http://dx.doi.org/10.1128/aem.00298-14.

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ABSTRACTAnalyzing the dynamics of biofilm formation helps to deepen our understanding of surface colonization in natural environments. While methods for screening biofilm formation in the laboratory are well established, studies in marine environments have so far been based upon destructive analysis of individual samples and provide only discontinuous snapshots of biofilm establishment. In order to explore the development of biofilm over time and under various biotic and abiotic conditions, we applied a recently developed optical biofilm sensor to quasicontinuously analyze marine biofilm dynam

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Entcheva-Dimitrov, Plamena, and Alfred M. Spormann. "Dynamics and Control of Biofilms of the Oligotrophic Bacterium Caulobacter crescentus." Journal of Bacteriology 186, no. 24 (2004): 8254–66. http://dx.doi.org/10.1128/jb.186.24.8254-8266.2004.

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ABSTRACT Caulobacter crescentus is an oligotrophic α-proteobacterium with a complex cell cycle involving sessile-stalked and piliated, flagellated swarmer cells. Because the natural lifestyle of C. crescentus intrinsically involves a surface-associated, sessile state, we investigated the dynamics and control of C. crescentus biofilms developing on glass surfaces in a hydrodynamic system. In contrast to biofilms of the well-studied Pseudomonas aeruginosa, Escherichia coli, and Vibrio cholerae, C. crescentus CB15 cells form biphasic biofilms, consisting predominantly of a cell monolayer biofilm

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Walencka, Elzbieta, Marzena Wieckowska-Szakiel, Sylwia Rozalska, Beata Sadowska, and Barbara Rozalska. "A Surface-Active Agent from Saccharomyces cerevisiae Influences Staphylococcal Adhesion and Biofilm Development." Zeitschrift für Naturforschung C 62, no. 5-6 (2007): 433–38. http://dx.doi.org/10.1515/znc-2007-5-618.

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Bacterial biofilms which are responsible for a number of diseases are very difficult to control effectively because of their high resistance to antibiotics and the host defence system. The use of natural products decreasing or preventing initial adhesion of bacteria and biofilm formation is one of the alternative therapeutic strategies taken into consideration. We ask the question, whether a crude extract from the cell wall of Saccharomyces cerevisiae (mannoprotein), which possesses surfactant activity, may be used as inhibitor of Staphylococcus aureus and S. epidermidis biofilm development. B

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Zhang, Rui Yong, Yu Tong Zhang, Thomas R. Neu, et al. "Initial Attachment and Biofilm Formation of a Novel Crenarchaeote on Mineral Sulfides." Advanced Materials Research 1130 (November 2015): 127–30. http://dx.doi.org/10.4028/www.scientific.net/amr.1130.127.

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This study focused on colonization and biofilm formation of a new crenarchaeoteAcidianussp. DSM 29099 on pyrite and chalcopyrite. Confocal laser scanning microscopy (CLSM) in combination with several fluorescent stains was applied to examine spatial distribution of cells and biofilms, as well as extracellular polymeric substances (EPS) production on the substrates. Around 60% and 35% of the inoculum adhered to pyrite and chalcopyrite within 2 h, respectively. Cells ofAcidianussp. DSM 29099 were heterogeneously distributed on both pyrite and chalcopyrite surfaces, while large mineral surfaces r

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18

Pamp, Sünje Johanna, and Tim Tolker-Nielsen. "Multiple Roles of Biosurfactants in Structural Biofilm Development by Pseudomonas aeruginosa." Journal of Bacteriology 189, no. 6 (2007): 2531–39. http://dx.doi.org/10.1128/jb.01515-06.

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ABSTRACT Recent studies have indicated that biosurfactants produced by Pseudomonas aeruginosa play a role both in maintaining channels between multicellular structures in biofilms and in dispersal of cells from biofilms. Through the use of flow cell technology and enhanced confocal laser scanning microscopy, we have obtained results which suggest that the biosurfactants produced by P. aeruginosa play additional roles in structural biofilm development. We present genetic evidence that during biofilm development by P. aeruginosa, biosurfactants promote microcolony formation in the initial phase

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19

Hill, Walter R., Angela T. Bednarek, and I. Lauren Larsen. "Cadmium sorption and toxicity in autotrophic biofilms." Canadian Journal of Fisheries and Aquatic Sciences 57, no. 3 (2000): 530–37. http://dx.doi.org/10.1139/f99-286.

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Autotrophic biofilms (periphyton) accumulate substantial quantities of metals from contaminated water. In this study, we measured the time course of biofilm cadmium sorption, examined the effects of current, biomass, and light on short-term cadmium sorption by biofilms, and tested the toxicity of cadmium to biofilm photosynthesis. The time course of cadmium sorption appeared to be a linear function of time over the 48-h measurement period. Biofilms in current [Formula: see text]2 cm·s-1 sorbed three to five times more cadmium than biofilms in still water. Cadmium sorbed after 4 h was 75% great

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Allegrucci, Magee, and Karin Sauer. "Characterization of Colony Morphology Variants Isolated from Streptococcus pneumoniae Biofilms." Journal of Bacteriology 189, no. 5 (2006): 2030–38. http://dx.doi.org/10.1128/jb.01369-06.

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ABSTRACT In this study, we report the isolation of colony morphology variants from Streptococcus pneumoniae serotype 3 biofilms. The colony variants differed in colony size (large, medium, and small) and their mucoid appearance on blood agar. The small nonmucoid variant (SCV) emerged during the initial attachment stage of S. pneumoniae biofilm formation and dominated over the course of biofilm growth. Mucoid variants appeared at later biofilm developmental stages. The reduction in colony size/mucoidy correlated with a decrease in capsule production and an increase in initial attachment. The la

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Yan, Zhifeng, Junrui Guo, Qiming Chen, Sibao Wan, Zhen Qin, and Haiyan Gao. "Antibiofilm Activity of Amomum tsaoko Essential Oil on Staphylococcus aureus and Its Application in Pork Preservation." Foods 14, no. 4 (2025): 662. https://doi.org/10.3390/foods14040662.

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Staphylococcus aureus (S. aureus) can contaminate food by forming biofilms, leading to significant food safety concerns. Amomum tsaoko essential oil (AEO) has been shown to be an effective plant-derived antibacterial agent. This study investigated the antibiofilm activity of AEO and evaluated its potential benefit in pork preservation. The results showed that AEO solution (2 mg/mL) can effectively remove the biofilm of S. aureus on food contact materials, achieving a removal rate of over 90%. Scanning electron microscopy (SEM) revealed that the S. aureus biofilm structure was disrupted after t

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Hao, Yu, Xiaoyu Huang, Xuedong Zhou, et al. "Influence of Dental Prosthesis and Restorative Materials Interface on Oral Biofilms." International Journal of Molecular Sciences 19, no. 10 (2018): 3157. http://dx.doi.org/10.3390/ijms19103157.

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Oral biofilms attach onto both teeth surfaces and dental material surfaces in oral cavities. In the meantime, oral biofilms are not only the pathogenesis of dental caries and periodontitis, but also secondary caries and peri-implantitis, which would lead to the failure of clinical treatments. The material surfaces exposed to oral conditions can influence pellicle coating, initial bacterial adhesion, and biofilm formation, due to their specific physical and chemical characteristics. To define the effect of physical and chemical characteristics of dental prosthesis and restorative material on or

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Valentine, Katey L., and Alistair B. A. Boxall. "Interactions Between Plastic, Microbial Biofilms and Gammarus pulex: An Initial Investigation." Bulletin of Environmental Contamination and Toxicology 108, no. 4 (2022): 609–15. http://dx.doi.org/10.1007/s00128-021-03448-5.

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AbstractThere is increasing evidence that microbial biofilms which form on the surface of marine plastics can increase plastics palatability, making it more attractive to organisms. The same information, however, does not exist for freshwater systems. This study observed the response of the freshwater amphipod Gammarus pulex when exposed to 3 cm-diameter discs of biofilm-covered plastic, both alone and when presented alongside its natural food. G. pulex did not fragment or consume the plastic materials, and the presence of colonised plastic in the immediate environment did not alter the amount

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Lee, Yuejia, and Chinling Wang. "Morphological Change and Decreasing Transfer Rate of Biofilm-Featured Listeria monocytogenes EGDe." Journal of Food Protection 80, no. 3 (2017): 368–75. http://dx.doi.org/10.4315/0362-028x.jfp-16-226.

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ABSTRACT Listeria monocytogenes, a lethal foodborne pathogen, has the ability to resist the hostile food processing environment and thus frequently contaminates ready-to-eat foods during processing. It is commonly accepted that the tendency of L. monocytogenes' to generate biofilms on various surfaces enhances its resistance to the harshness of the food processing environment. However, the role of biofilm formation in the transferability of L. monocytogenes EGDe remains controversial. We examined the growth of Listeria biofilms on stainless steel surfaces and their effect on the transferabilit

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Sachan, Tarun Kumar, and Virendra Kumar. "Antibiotic Susceptibility in Biofilms of Mycobacterium smegmatis." International Journal of Applied Sciences and Biotechnology 3, no. 4 (2015): 635–41. http://dx.doi.org/10.3126/ijasbt.v3i4.13522.

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In the present article we observed the quantification and morphological, ultrastructural features of biofilms of fast growing clinical isolates M. smegmatis in presence of first line antibacterial drug streptomycin, isoniazid rifampicin, ethambutol and pyrazinamide. Biofilm of M. smegmatis was found to be unaffected at concentration of drugs that inhibited growth of planktonic bacilli .Thus, the biofilm growth modus appears to be a strategy for replicating bacilli to evade the trap of antibacterials. Planktonic and biofilm cells had similar intrinsic antibiotic susceptibility. Electron microsc

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He, Zhiyan, Jingping Liang, Zisheng Tang, Rui Ma, Huasong Peng, and Zhengwei Huang. "Role of the luxS Gene in Initial Biofilm Formation by Streptococcus mutans." Journal of Molecular Microbiology and Biotechnology 25, no. 1 (2015): 60–68. http://dx.doi.org/10.1159/000371816.

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Quorum sensing (QS) is a process by which bacteria communicate with each other by secreting chemical signals called autoinducers (AIs). Among Gram-negative and Gram-positive bacteria, AI-2 synthesized by the LuxS enzyme is widespread. The aim of this study was to evaluate the effect of QS <i>luxS</i> gene on initial biofilm formation by <i>Streptococcus mutans</i>. The bacterial cell surface properties, including cell hydrophobicity (bacterial adherence to hydrocarbons) and aggregation, which are important for initial adherence during biofilm development, were investiga

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Vilas Boas, Diana, Joana Castro, Daniela Araújo, et al. "The Role of Flagellum and Flagellum-Based Motility on Salmonella Enteritidis and Escherichia coli Biofilm Formation." Microorganisms 12, no. 2 (2024): 232. http://dx.doi.org/10.3390/microorganisms12020232.

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Flagellum-mediated motility has been suggested to contribute to virulence by allowing bacteria to colonize and spread to new surfaces. In Salmonella enterica and Escherichia coli species, mutants affected by their flagellar motility have shown a reduced ability to form biofilms. While it is known that some species might act as co-aggregation factors for bacterial adhesion, studies of food-related biofilms have been limited to single-species biofilms and short biofilm formation periods. To assess the contribution of flagella and flagellum-based motility to adhesion and biofilm formation, two Sa

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Gansauge, Chris, Danny Echtermeyer, and Dieter Frense. "Simulation of Electrical Biofilm Impedance to Determine the Sensitivity of Electrode Geometries." Chemosensors 12, no. 1 (2024): 14. http://dx.doi.org/10.3390/chemosensors12010014.

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Biofilms are ubiquitous at interfaces of natural and technical origin. Depending on type and application, biofilm formation is desired or has to be prevented. Therefore, reliable detection of initial biofilm growth is essential in many areas. One method of biofilm monitoring is the electrochemical impedance spectroscopy. Among other factors, this method is heavily dependent on the electrode geometry. In order to achieve a high measurement sensitivity, the electrode size must be chosen according to the biofilm that is to be measured. This paper presents an approach for simulating and modeling t

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Koka, Krishna Mohan, Pranitha Pillarisetti, and Manoj Kumar Yasangi. "Dental Plaque Biofilm: Development, Pathogenicity and Analysis." International Journal of Science and Healthcare Research 6, no. 3 (2021): 127–34. http://dx.doi.org/10.52403/ijshr.20210721.

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Biofilms are communities of microorganisms which are found attached to a surface. They develop on both biotic and abiotic surfaces and could act as a source of infection. The development of biofilms is a complex process and it involves several steps such as initial adhesion, reversible binding of bacteria to the solid surface, production of exopolysaccharide matrix, irreversible binding to the surface, maturation of biofilm structure, disintegration and dispersion of organized structure and the formation of new habitats. The biofilm exhibits unique properties of protecting host defences and de

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Zhou, Gang, Long-jie Li, Qing-shan Shi, You-sheng Ouyang, Yi-ben Chen, and Wen-feng Hu. "Efficacy of metal ions and isothiazolones in inhibiting Enterobacter cloacae BF-17 biofilm formation." Canadian Journal of Microbiology 60, no. 1 (2014): 5–14. http://dx.doi.org/10.1139/cjm-2013-0492.

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Enterobacter cloacae is a nosocomial pathogen. The E. cloacae strain BF-17, with a high capacity for biofilm formation, was screened and identified from industrially contaminated samples, carried out in our laboratory. To develop an efficient strategy to deal with biofilms, we investigated the effects of metal ions, including Na+, K+, Ca2+, Mg2+, Cu2+, and Mn2+, and 3 isothiazolones, on elimination of E. cloacae BF-17 biofilm formation by using a 0.1% crystal violet staining method. The results revealed that higher concentrations of Na+ or K+ significantly inhibited E. cloacae BF-17 biofilm de

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Pannanusorn, Srisuda, Bernardo Ramírez-Zavala, Heinrich Lünsdorf, Birgitta Agerberth, Joachim Morschhäuser, and Ute Römling. "Characterization of Biofilm Formation and the Role of BCR1 in Clinical Isolates of Candida parapsilosis." Eukaryotic Cell 13, no. 4 (2013): 438–51. http://dx.doi.org/10.1128/ec.00181-13.

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ABSTRACT In Candida parapsilosis , biofilm formation is considered to be a major virulence factor. Previously, we determined the ability of 33 clinical isolates causing bloodstream infection to form biofilms and identified three distinct groups of biofilm-forming strains (negative, low, and high). Here, we establish two different biofilm structures among strains forming large amounts of biofilm in which strains with complex spider-like structures formed robust biofilms on different surface materials with increased resistance to fluconazole. Surprisingly, the transcription factor Bcr1, required

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Habimana, Olivier, Mickael Meyrand, Thierry Meylheuc, Saulius Kulakauskas, and Romain Briandet. "Genetic Features of Resident Biofilms Determine Attachment of Listeria monocytogenes." Applied and Environmental Microbiology 75, no. 24 (2009): 7814–21. http://dx.doi.org/10.1128/aem.01333-09.

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ABSTRACT Planktonic Listeria monocytogenes cells in food-processing environments tend most frequently to adhere to solid surfaces. Under these conditions, they are likely to encounter resident biofilms rather than a raw solid surface. Although metabolic interactions between L. monocytogenes and resident microflora have been widely studied, little is known about the biofilm properties that influence the initial fixation of L. monocytogenes to the biofilm interface. To study these properties, we created a set of model resident Lactococcus lactis biofilms with various architectures, types of matr

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Dong, Qingli, Linjun Sun, Taisong Fang, et al. "Biofilm Formation of Listeria monocytogenes and Pseudomonas aeruginosa in a Simulated Chicken Processing Environment." Foods 11, no. 13 (2022): 1917. http://dx.doi.org/10.3390/foods11131917.

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This study aims to investigate the mono- and dual-species biofilm formation of Listeria monocytogenes and Pseudomonas aeruginosa incubated in different culture mediums, inoculum ratios, and incubation time. The planktonic cell population and motility were examined to understand the correlation with biofilm formation. The results showed that chicken juice significantly inhibited the biofilm formation of L. monocytogenes (p < 0.05). Pseudomonas aeruginosa was the dominant bacteria in the dual-species biofilm formation in the trypticase soy broth medium. The dynamic changes in biofilm formatio

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Gomes, Luciana C., and Filipe J. M. Mergulhão. "A Selection of Platforms to Evaluate Surface Adhesion and Biofilm Formation in Controlled Hydrodynamic Conditions." Microorganisms 9, no. 9 (2021): 1993. http://dx.doi.org/10.3390/microorganisms9091993.

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The early colonization of surfaces and subsequent biofilm development have severe impacts in environmental, industrial, and biomedical settings since they entail high costs and health risks. To develop more effective biofilm control strategies, there is a need to obtain laboratory biofilms that resemble those found in natural or man-made settings. Since microbial adhesion and biofilm formation are strongly affected by hydrodynamics, the knowledge of flow characteristics in different marine, food processing, and medical device locations is essential. Once the hydrodynamic conditions are known,

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Moreira, Cristiano G., Kelli Palmer, Marvin Whiteley, et al. "Bundle-Forming Pili and EspA Are Involved in Biofilm Formation by Enteropathogenic Escherichia coli." Journal of Bacteriology 188, no. 11 (2006): 3952–61. http://dx.doi.org/10.1128/jb.00177-06.

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ABSTRACT Microcolony formation is one of the initial steps in biofilm development, and in enteropathogenic Escherichia coli (EPEC) it is mediated by several adhesins, including the bundle-forming pilus (BFP) and the EspA filament. Here we report that EPEC forms biofilms on plastic under static conditions and a flowthrough continuous culture system. The abilities of several EPEC isogenic mutants to form biofilms were assessed. Adhesins such as BFP and EspA, important in microcolony formation on epithelial cells, are also involved in bacterial aggregation during biofilm formation on abiotic surf

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Bester, Elanna, Elizabeth A. Edwards, and Gideon M. Wolfaardt. "Planktonic cell yield is linked to biofilm development." Canadian Journal of Microbiology 55, no. 10 (2009): 1195–206. http://dx.doi.org/10.1139/w09-075.

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We report on the ability of surface-associated microbes to produce and release single planktonic cells to the bulk liquid as early as 6 h after attachment, with pure culture and mixed-species biofilms yielding up to ~1 × 106 cells/cm2 of attachment area per hour to the effluent after 24 h. Planktonic cell production typically increased as the biofilm developed and levelled off after the biofilm reached steady-state dimensions. Microscopic observations of continuous-flow cultured biofilms revealed independent cell movement within the biofilm microenvironment compared with flow-dependent movemen

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Wang, Rao, Shaopo Wang, Lingjie Liu, et al. "Research Progress on the Influence Factors of the Quorum Sensing System Regulating the Growth of Wastewater Treatment Biofilm." Water 17, no. 13 (2025): 1944. https://doi.org/10.3390/w17131944.

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Biofilms represent a prevalent and highly adaptable microbial lifestyle across diverse environments. With increasing understanding of quorum sensing (QS), its crucial role in regulating biofilm development in wastewater treatment systems has gained widespread recognition. This review systematically summarizes the role of QS in biofilm formation, encompassing the stages of initial attachment, irreversible adhesion, maturation, and dispersal. Additionally, the impacts of conventional environmental factors and specific stressors on QS-mediated biofilm regulation are discussed. Finally, the review

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Zhang, Qiuting, Jian Li, Japinder Nijjer, et al. "Morphogenesis and cell ordering in confined bacterial biofilms." Proceedings of the National Academy of Sciences 118, no. 31 (2021): e2107107118. http://dx.doi.org/10.1073/pnas.2107107118.

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Biofilms are aggregates of bacterial cells surrounded by an extracellular matrix. Much progress has been made in studying biofilm growth on solid substrates; however, little is known about the biophysical mechanisms underlying biofilm development in three-dimensional confined environments in which the biofilm-dwelling cells must push against and even damage the surrounding environment to proliferate. Here, combining single-cell imaging, mutagenesis, and rheological measurement, we reveal the key morphogenesis steps of Vibrio cholerae biofilms embedded in hydrogels as they grow by four orders o

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Zahid, Waleed M., and Jerzy J. Ganczarczyk. "Effects of Organic Suspended Solids on Biofilm Performance." Water Quality Research Journal 31, no. 2 (1996): 329–40. http://dx.doi.org/10.2166/wqrj.1996.020.

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Abstract The presence of organic particles in the feed to an RBC unit influenced adversely the physical and attachment properties of the RBC biofilms as well as the unit performance. Biofilms, especially those in initial compartments of the RBC model, exhibited a fluffy, loose filamentous structure which was continually eroding. It is believed that the entrapment of the particulate organics by the biofilm matrix causes a subsequent development of oxygen-depleted zones and structural flaws within the biofilm.

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Høiby, Niels, Claus Moser, and Oana Ciofu. "Pseudomonas aeruginosa in the Frontline of the Greatest Challenge of Biofilm Infection—Its Tolerance to Antibiotics." Microorganisms 12, no. 11 (2024): 2115. http://dx.doi.org/10.3390/microorganisms12112115.

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P. aeruginosa biofilms are aggregates of bacteria surrounded by a self-produced matrix which binds to some antibiotics such as aminoglycosides. P. aeruginosa biofilms are tolerant to antibiotics. The treatment of biofilm infections leads to a recurrence of symptoms after finishing antibiotic treatment, although the initial clinical response to the treatment is frequently favorable. There is a concentration gradient of oxygen and nutrients from the surface to the center of biofilms. Surface-located bacteria are multiplying and metabolizing, whereas deeper located bacteria are dormant and tolera

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Donlan, Rodney M., and J. William Costerton. "Biofilms: Survival Mechanisms of Clinically Relevant Microorganisms." Clinical Microbiology Reviews 15, no. 2 (2002): 167–93. http://dx.doi.org/10.1128/cmr.15.2.167-193.2002.

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SUMMARY Though biofilms were first described by Antonie van Leeuwenhoek, the theory describing the biofilm process was not developed until 1978. We now understand that biofilms are universal, occurring in aquatic and industrial water systems as well as a large number of environments and medical devices relevant for public health. Using tools such as the scanning electron microscope and, more recently, the confocal laser scanning microscope, biofilm researchers now understand that biofilms are not unstructured, homogeneous deposits of cells and accumulated slime, but complex communities of surf

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Hong, Wenzhou, Bing Pang, Shayla West-Barnette, and W. Edward Swords. "Phosphorylcholine Expression by Nontypeable Haemophilus influenzae Correlates with Maturation of Biofilm Communities In Vitro and In Vivo." Journal of Bacteriology 189, no. 22 (2007): 8300–8307. http://dx.doi.org/10.1128/jb.00532-07.

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ABSTRACT Nontypeable Haemophilus influenzae (NTHI) causes chronic infections that feature the formation of biofilm communities. NTHI variants within biofilms have on their surfaces lipooligosaccharides containing sialic acid (NeuAc) and phosphorylcholine (PCho). Our work showed that NeuAc promotes biofilm formation, but we observed no defect in the initial stages of biofilm formation for mutants lacking PCho. In this study, we asked if alterations in NTHI PCho content affect later stages of biofilm maturation. Biofilm communities were compared for NTHI 2019 and isogenic mutants that either lac

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Matosova, E. V. "The ability of Salmonella enterica to biofilm formation in conditions of interspecific interaction with representatives of the intestinal microflora." Sanitarnyj vrač (Sanitary Doctor), no. 8 (July 6, 2021): 75–80. http://dx.doi.org/10.33920/med-08-2108-11.

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For effective distribution in the gastrointestinal tract, Salmonella must have the ability to form biofilms and compete for nutrients with the host microbiota. Objective: to characterize the ability of Salmonella enterica Typhimurium to biofilm formation under conditions of interspecific interaction in a multicultural biofilm with representatives of the intestinal microbiota in an in vitro experiment. Museum strains of the bacteria Salmonella enterica serovar Typhimurium, Lactobacillus acidophilus and Lactobacillus casei, Escherichia coli were used in the work. The process of interspecific int

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He, Jialin, Xiangyu Gao, Hanbing Huang, and Jianxiong Hao. "Proposal and Verification of the Theory of Layer-by-Layer Elimination of Biofilm in Listeria monocytogenes." Foods 12, no. 7 (2023): 1361. http://dx.doi.org/10.3390/foods12071361.

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Biofilms are microbial communities that represent a high abundance of microbial life forms on Earth. Within biofilms, structural changes during clearance processes occur in three spatial and temporal dimensions; therefore, microscopy and quantitative image analysis are essential in elucidating their function. Here, we present confocal laser scanning microscopy (CLSM) in conjunction with ISA-2 software analysis for the automated and high-throughput quantification, analysis, and visualisation of biofilm interiors and overall biofilm properties in three spatial and temporal dimensions. This paper

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Aonofriesei, Florin. "Surfactants’ Interplay with Biofilm Development in Staphylococcus and Candida." Pharmaceutics 16, no. 5 (2024): 657. http://dx.doi.org/10.3390/pharmaceutics16050657.

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The capacity of micro-organisms to form biofilms is a pervasive trait in the microbial realm. For pathogens, biofilm formation serves as a virulence factor facilitating successful host colonization. Simultaneously, infections stemming from biofilm-forming micro-organisms pose significant treatment challenges due to their heightened resistance to antimicrobial agents. Hence, the quest for active compounds capable of impeding microbial biofilm development stands as a pivotal pursuit in biomedical research. This study presents findings concerning the impact of three surfactants, namely, polysorba

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Zheng, Yaqian, Di Wang, and Luyan Z. Ma. "Effect of Polyhexamethylene Biguanide in Combination with Undecylenamidopropyl Betaine or PslG on Biofilm Clearance." International Journal of Molecular Sciences 22, no. 2 (2021): 768. http://dx.doi.org/10.3390/ijms22020768.

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Hospital-acquired infection is a great challenge for clinical treatment due to pathogens’ biofilm formation and their antibiotic resistance. Here, we investigate the effect of antiseptic agent polyhexamethylene biguanide (PHMB) and undecylenamidopropyl betaine (UB) against biofilms of four pathogens that are often found in hospitals, including Gram-negative bacteria Pseudomonas aeruginosa and Escherichia coli, Gram-positive bacteria Staphylococcus aureus, and pathogenic fungus, Candida albicans. We show that 0.02% PHMB, which is 10-fold lower than the concentration of commercial products, has

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Carrazco-Palafox, Jair, Blanca Estela Rivera-Chavira, Jaime Raúl Adame-Gallegos, Luz María Rodríguez-Valdez, Erasmo Orrantia-Borunda, and Guadalupe Virginia Nevárez-Moorillón. "Rhamnolipids from Pseudomonas aeruginosa Rn19a Modifies the Biofilm Formation over a Borosilicate Surface by Clinical Isolates." Coatings 11, no. 2 (2021): 136. http://dx.doi.org/10.3390/coatings11020136.

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Microbial cells are reversibly associated with surfaces in the form of biofilms. Adhesion is the mechanism used by the microorganisms to bind to a surface initially; no biofilm is formed without the initial adhesion. The aim of this work was to evaluate the efficacy of the rhamnolipids of Pseudomonas aeruginosa Rn19a in inhibiting the biofilms formed by the clinical isolates Escherichia coli I5, Pseudomonas aeruginosa E26, Enterococcus faecalis I27 on borosilicate coupons inside a Center for Disease Control and Prevention (CDC) reactor. The isolate E26 (P. aeruginosa) did not show an adverse e

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Silyn-Roberts, G., and G. Lewis. "Substrata effects on bacterial biofilm development in a subsurface flow dairy waste treatment wetland." Water Science and Technology 48, no. 8 (2003): 261–69. http://dx.doi.org/10.2166/wst.2003.0477.

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Biofilm development on two distinct rock substrata was investigated both in vitro and in a subsurface flow wastewater treatment wetland in order to determine the effect of hydrophobicity on initial bacterial adsorption, tertiary biofilm development and microbial population structure. Two commonly used wetland rock types, slag (a hydrophobic by-product of the steel smelter industry) and greywacke (a more hydrophilic sedimentary rock) were evaluated. In vitro investigations of initial microbial adsorption trends showed that the more hydrophobic slag displayed rapid bacterial adsorption rates com

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Lambert, Guillaume, Andrew Bergman, Qiucen Zhang, David Bortz, and Robert Austin. "Physics of biofilms: the initial stages of biofilm formation and dynamics." New Journal of Physics 16, no. 4 (2014): 045005. http://dx.doi.org/10.1088/1367-2630/16/4/045005.

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Chan, Yinghan, Xun Hui Wu, Buong Woei Chieng, Nor Azowa Ibrahim, and Yoon Yee Then. "Superhydrophobic Nanocoatings as Intervention against Biofilm-Associated Bacterial Infections." Nanomaterials 11, no. 4 (2021): 1046. http://dx.doi.org/10.3390/nano11041046.

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Biofilm formation represents a significant cause of concern as it has been associated with increased morbidity and mortality, thereby imposing a huge burden on public healthcare system throughout the world. As biofilms are usually resistant to various conventional antimicrobial interventions, they may result in severe and persistent infections, which necessitates the development of novel therapeutic strategies to combat biofilm-based infections. Physicochemical modification of the biomaterials utilized in medical devices to mitigate initial microbial attachment has been proposed as a promising

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