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Journal articles on the topic 'Microbial biofilm'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Lehtola, Markku J., Ilkka T. Miettinen, and Pertti J. Martikainen. "Biofilm formation in drinking water affected by low concentrations of phosphorus." Canadian Journal of Microbiology 48, no. 6 (2002): 494–99. http://dx.doi.org/10.1139/w02-048.

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There are geographical regions where microbial growth in drinking waters is limited by phosphorus instead of organic carbon. In these drinking waters even a low amount of phosphorus can strongly enhance microbial growth. The formation of biofilm can be limited by low availability of phosphorus in drinking waters with low content of phosphorus. The formation of biofilms on polyvinyl chloride plates was studied in laboratory experiments with water containing 48 μg/L assimilable organic carbon and 0.19 μg/L microbially available phosphorus. We found that low additions of phosphate (15 μg/L PO43

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2

Liaqat, Farah, Waiza Ansar, Noor Muhammad, et al. "Development of Microbial Biofilms and Their Role in device, non-device and organ system level Infections." BioScientific Review 7, no. 2 (2025): 32–53. https://doi.org/10.32350/bsr.72.04.

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Background. Microorganisms, while providing many health benefits to human beings and other living organisms, are also responsible for significant infections. They cause infections in both planktonic and biofilm modes. Biofilms, defined as architectural communities of microorganisms encased in an extracellular polymeric substance (EPS), are strongly associated with infections. According to the National Institute of Health Sciences (NIH), biofilms account for 65% of microbial infections and 80% of chronic infections. Methods. This review examines the current literature on microbial biofilms, foc

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3

Yin, Wen, Yiting Wang, Lu Liu, and Jin He. "Biofilms: The Microbial “Protective Clothing” in Extreme Environments." International Journal of Molecular Sciences 20, no. 14 (2019): 3423. http://dx.doi.org/10.3390/ijms20143423.

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Microbial biofilms are communities of aggregated microbial cells embedded in a self-produced matrix of extracellular polymeric substances (EPS). Biofilms are recalcitrant to extreme environments, and can protect microorganisms from ultraviolet (UV) radiation, extreme temperature, extreme pH, high salinity, high pressure, poor nutrients, antibiotics, etc., by acting as “protective clothing”. In recent years, research works on biofilms have been mainly focused on biofilm-associated infections and strategies for combating microbial biofilms. In this review, we focus instead on the contemporary pe

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Wang, Dan, Emmanuel Kyere, and Faizan Ahmed Sadiq. "New Trends in Photodynamic Inactivation (PDI) Combating Biofilms in the Food Industry—A Review." Foods 10, no. 11 (2021): 2587. http://dx.doi.org/10.3390/foods10112587.

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Biofilms cause problems in the food industry due to their persistence and incompetent hygiene processing technologies. Interest in photodynamic inactivation (PDI) for combating biofilms has increased in recent years. This technique can induce microbial cell death, reduce cell attachment, ruin biofilm biomolecules and eradicate structured biofilms without inducing microbial resistance. This review addresses microbial challenges posed by biofilms in food environments and highlights the advantages of PDI in preventing and eradicating microbial biofilm communities. Current findings of the antibiof

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Detusheva, E. V., P. V. Slukin, and N. K. Fursova. "Molecular-genetic methods for studying microbial biofilms." Bacteriology 5, no. 2 (2020): 49–55. http://dx.doi.org/10.20953/2500-1027-2020-2-49-55.

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The review article contains information on the clinical significance of microbial biofilms and the main modern molecular genetic methods used to study microbial biofilms: comparative study of genome, transcriptome and proteome of planktonic cells and biofilms; genetic control of biofilm extracellular matrix production; analysis of the contribution of individual genes and gene clusters to the formation of the biofilm phenotype; identification of microorganism species in polymicrobial biofilms. Key words: microbial biofilms, molecular genetic methods, genome, transcriptome, proteome, microbial s

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Ki, D., J. Park, J. Lee, and K. Yoo. "Microbial diversity and population dynamics of activated sludge microbial communities participating in electricity generation in microbial fuel cells." Water Science and Technology 58, no. 11 (2008): 2195–201. http://dx.doi.org/10.2166/wst.2008.577.

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In this study, we performed microbial community analysis to examine microbial diversity and community structure in microbial fuel cells (MFCs) seeded with activated sludge from a municipal wastewater treatment plant in South Korea. Because anode-attached biofilm populations are particularly important in electricity transfer, the ecological characteristics of anode-attached biofilm microbes were explored and compared with those of microbes grown in suspension in an anode chamber. 16S rDNA-based community analysis showed that the degree of diversity in anode-attached biofilms was greater than th

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Bishop, Paul L., and Tong Yu. "A microelectrode study of redox potential change in biofilms." Water Science and Technology 39, no. 7 (1999): 179–85. http://dx.doi.org/10.2166/wst.1999.0357.

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In this study, we examined the stratification of microbial processes and the associated redox potential changes in biofilms using microelectrode techniques. Two types of biofilms, each with a different combination of microbial processes, were examined. The first type carried aerobic oxidation and sulfate reduction, while the second one provided aerobic oxidation and nitrification. The microelectrodes used were oxygen, sulfide, ammonium, pH and redox potential microelectrodes. The results of this study provide the following new experimental evidence: (1) The aerobic/sulfate-reducing biofilm had

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8

Srinivasan, Anand, Anand K. Ramasubramanian, and José L. Lopez-Ribot. "Nano-biofilm Arrays as a Novel Universal Platform for Microscale Microbial Culture and High-Throughput Downstream Applications." Current Medicinal Chemistry 26, no. 14 (2019): 2529–35. http://dx.doi.org/10.2174/0929867326666190107155953.

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Biofilms are the predominant mode of microbial growth and it is now fully accepted that a majority of infections in humans are associated with a biofilm etiology. Biofilms are defined as attached and structured microbial communities surrounded by a protective exopolymeric matrix. Importantly, sessile microorganisms growing within a biofilm are highly resistant to antimicrobial agents. Thus, there is an urgent need to develop new and improved anti-biofilm therapies. Unfortunately, most of the current techniques for in-vitro biofilm formation are not compatible with high throughput screening tec

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9

Kabwanga, Ismail T., Atila Yetişemiyen, and Shakira Nankya. "DAIRY INDUSTRIAL HYGIENE: A REVIEW ON BIOFILM CHALLENGES AND CONTROL." International Journal of Research -GRANTHAALAYAH 6, no. 2 (2018): 268–73. http://dx.doi.org/10.29121/granthaalayah.v6.i2.2018.1570.

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The development of biofilms and the microbial biofilm adherence into the production equipment and facilities used in the dairy industry is a critical issue that needs to be addressed. Biofilms lead to the contamination of food by pathogenic and spoilage m/os. The microbes cause both company loses due to unsafe spoilt products, equipment depreciation and death of consumers under severe pathogenic out breaks. Biofilms may also lead to a failure of anti- microbial therapy hence major threats to modern medicine. Biofilm formation however is a dynamic process with different mechanisms involved in t

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10

Ismail, T. Kabwanga, Yetişemiyen Atila, and Nankya Shakira. "DAIRY INDUSTRIAL HYGIENE: A REVIEW ON BIOFILM CHALLENGES AND CONTROL." International Journal of Research - Granthaalayah 6, no. 2 (2018): 268–73. https://doi.org/10.5281/zenodo.1194694.

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The development of biofilms and the microbial biofilm adherence into the production equipment and facilities used in the dairy industry is a critical issue that needs to be addressed. Biofilms lead to the contamination of food by pathogenic and spoilage m/os. The microbes cause both company loses due to unsafe spoilt products, equipment depreciation and death of consumers under severe pathogenic out breaks. Biofilms may also lead to a failure of anti- microbial therapy hence major threats to modern medicine. Biofilm formation however is a dynamic process with different mechanisms involved in t

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11

Abhimannue, Anu P., Meena K. Cheruvathur, and Sreeja A. Sreenivasan. "BIOFILM INHIBITION POTENTIAL OF AQUEOUS LEAF EXTRACT OF SARACA ASOCA LINN. AGAINST PSEUDOMONAS AERUGINOSA." Journal of Advanced Scientific Research 13, no. 02 (2022): 60–66. http://dx.doi.org/10.55218/jasr.202213209.

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About 95-99% of microorganisms exist in nature as biofilms. The homogenous or heterogeneous communities of pathogenic bacteria constituting microbial biofilms exert anti-microbial resistance. Several natural anti-biofilm agents have been recognized, like phytochemicals, biosurfactants, anti-microbial peptides, and microbial enzymes. The present study investigates the effect of aqueous extract of Saraca asoca Linn. on the in vitro formation of pseudomonas aeruginosa biofilm. The quantitative assessment of biofilm formation was done by crystal violet staining assay. Various factors such as tempe

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Krutika, Dixit* Mohini Patel Reshma Jain Bhavik Chauhan. "A Review on Exploring Herbal Approaches to Combat Biofilm Formation." International Journal of Pharmaceutical Sciences 2, no. 6 (2024): 1187–201. https://doi.org/10.5281/zenodo.12548260.

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Biofilms, intricate communities of bacteria enclosed within a self-produced extracellular matrix, pose formidable challenges in both medical and industrial settings due to their heightened resistance to traditional antibiotics. This study explores the potential of natural treatments as alternative strategies to combat biofilm-associated issues. Natural agents derived from various sources, including plants and other organic materials, have gained attention for their antimicrobial properties and potential to disrupt biofilm formation and integrity. This research investigates the mechanisms by wh

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13

Pizarro, G. E., C. Garcia, R. Moreno, and M. E. Sepulveda. "Two-dimensional cellular automaton model for mixed-culture biofilm." Water Science and Technology 49, no. 11-12 (2004): 193–98. http://dx.doi.org/10.2166/wst.2004.0839.

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Structural and microbial heterogeneity occurs in almost any type of biofilm system. General approaches for the design of biofilm systems consider biofilms as homogeneous and of constant thickness. In order to improve the design of biofilms systems, models need to incorporate structural heterogeneity and the effect of inert microbial mass. We have improved a 2D biofilm model based on cellular automata (CA) and used it to simulate multidimensional biofilms with active and inert biomass including a self-organizing development. Results indicate that the presence of inert biomass within biofilm str

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14

Ma, Mingyue, Guangda Yu, Zhen Xu, et al. "Reimagining Microbially Induced Concrete Deterioration: A Novel Approach Through Coupled Confocal Laser Scanning Microscope–Avizo Three-Dimensional Modeling of Biofilms." Microorganisms 13, no. 7 (2025): 1452. https://doi.org/10.3390/microorganisms13071452.

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Microbially induced concrete deterioration (MID) poses a significant and urgent challenge to urban sewerage systems globally, particularly in tropical coastal regions. Despite the acknowledged importance of biofilms in MICC, limited research on sewer pipe biofilms has hindered a comprehensive understanding of their deterioration mechanisms. To overcome this limitation, our research employed multiple staining techniques and digital volume correlation (DVC) technology, creating a new method to analyze the microstructure of biofilms, precisely identify the components of EPSs, and quantitatively e

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15

Bishop, Paul L., Tian C. Zhang, and Yun-Chang Fu. "Effects of biofilm structure, microbial distributions and mass transport on biodegradation processes." Water Science and Technology 31, no. 1 (1995): 143–52. http://dx.doi.org/10.2166/wst.1995.0032.

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The influence of biofilm structure on transport and transformation processes in biofilms has been investigated microscopically using microelectrodes, a micro-slicing procedure and various chemical and microbiological tests. The study demonstrates that the biofilm structure is highly stratified, characterized by an increase of biofilm density, a decrease of metabolically active biomass, and a decrease of porosity with biofilm depth. Both the effective diffusivity for dissolved oxygen and the effectiveness factor decrease with biofilm depth. Competition for substrate and space in biofilms result

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16

Licker, Monica, Roxana Moldovan, Elena Hogea, et al. "Microbial biofilm in human health - an updated theoretical and practical insight." Revista Romana de Medicina de Laborator 25, no. 1 (2017): 9–26. http://dx.doi.org/10.1515/rrlm-2017-0001.

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Abstract The term biofilm designates an aggregate of microorganisms belonging to one or more species which adhere to various surfaces but also to each another. These microbial communities are included and interconnected within an organic structure known as slime, composed of protein substances, polysaccharides, and DNA. The Center for Disease prevention and control considers infections with bacteria in biofilms among the 7 most important challenges which must be overcome in order to improve the safety of health services. The risk of microbial biofilm development exists for a long list of medic

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17

Okabe, Satoshi, Kikuko Hirata, and Yoshimasa Watanabe. "Dynamic changes in spatial microbial distribution in mixed-population biofilms: experimental results and model simulation." Water Science and Technology 32, no. 8 (1995): 67–74. http://dx.doi.org/10.2166/wst.1995.0266.

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Dynamic changes in spatial microbial distribution in mixed-population biofilms were experimentally determined using a microslicer technique and simulated by a biofilm accumulation model (BAM). Experimental results were compared with the model simulation. The biofilms cultured in partially submerged rotating biological contactors (RBC) with synthetic wastewater were used as test materials. Experimental results showed that an increase of substrate loading rate (i.e., organic carbon and NH4-N) resulted in the microbial stratification in the biofilms. Heterotrophs defeated nitrifiers and dominated

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18

Lewandowski, Z., H. Beyenal, J. Myers, and D. Stookey. "The effect of detachment on biofilm structure and activity: the oscillating pattern of biofilm accumulation." Water Science and Technology 55, no. 8-9 (2007): 429–36. http://dx.doi.org/10.2166/wst.2007.287.

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In our previous papers we have demonstrated that biofilm structure never reaches a steady state in biofilm reactors; in this paper we link this fact to biofilm detachment and to the oscillating pattern of biofilm accumulation. In one respect reactors supporting suspended microbial growth and reactors supporting attached microbial growth (biofilms) are similar: in both the biomass accumulates in the reactor and is disposed of with the effluent. However, while in reactors with suspended microbial growth biomass accumulation and disposal occur simultaneously, in biofilm reactors these two process

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19

Delavar, Mojtaba Aghajani, and Junye Wang. "Lattice Boltzmann Method in Modeling Biofilm Formation, Growth and Detachment." Sustainability 13, no. 14 (2021): 7968. http://dx.doi.org/10.3390/su13147968.

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Biofilms are a complex and heterogeneous aggregation of multiple populations of microorganisms linked together by their excretion of extracellular polymer substances (EPS). Biofilms can cause many serious problems, such as chronic infections, food contamination and equipment corrosion, although they can be useful for constructive purposes, such as in wastewater treatment, heavy metal removal from hazardous waste sites, biofuel production, power generation through microbial fuel cells and microbially enhanced oil recovery; however, biofilm formation and growth are complex due to interactions am

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20

Artyukh, T. V., T. N. Sokolova, and V. M. Sheibak. "MODERN METHODS FOR RESEARCHING MICROBIAL BIOFILMS OF THE ENTEROBACTERIACEAE FAMILY." Hepatology and Gastroenterology 5, no. 1 (2021): 30–36. http://dx.doi.org/10.25298/2616-5546-2021-5-1-30-36.

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The article outlines the main methods of studying microbial biofilms, which make it possible to reveal: the patterns of biofilm formation by microorganisms of the Enterobacteriaceae family, genetic programs regulating the processes of film formation, qualitative and quantitative characteristics of the components of microbial communities, the influence of external factors on the stages of biofilm formation and dispersion. The study of the phenomenon of film formation in combination with monitoring the resistance of intestinal microorganisms in the biofilm to antibacterial drugs will make it pos

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Zeineldin, Mohamed, Ahmed Esmael, Rashad R. Al-Hindi, Mona G. Alharbi, Debebe Ashenafi Bekele, and Addisu D. Teklemariam. "Beyond the Risk of Biofilms: An Up-and-Coming Battleground of Bacterial Life and Potential Antibiofilm Agents." Life 13, no. 2 (2023): 503. http://dx.doi.org/10.3390/life13020503.

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Microbial pathogens and their virulence factors like biofilms are one of the major factors which influence the disease process and its outcomes. Biofilms are a complex microbial network that is produced by bacteria on any devices and/or biotic surfaces to escape harsh environmental conditions and antimicrobial effects. Due to the natural protective nature of biofilms and the associated multidrug resistance issues, researchers evaluated several natural anti-biofilm agents, including bacteriophages and their derivatives, honey, plant extracts, and surfactants for better destruction of biofilm an

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Lu, Jingrang, Ian Struewing, and Nicholas J. Ashbolt. "Meta-Transcriptomic Response to Copper Corrosion in Drinking Water Biofilms." Microorganisms 13, no. 7 (2025): 1528. https://doi.org/10.3390/microorganisms13071528.

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Drinking water biofilm ecosystems harbor complex and dynamic prokaryotic and eukaryotic microbial communities. However, little is known about the impact of copper corrosion on microbial community functions in metabolisms and resistance. This study was conducted to evaluate the impact of upstream Cu pipe materials on downstream viable community structures, pathogen populations, and metatranscriptomic responses of the microbial communities in drinking water biofilms. Randomly transcribed cDNA was generated and sequenced from downstream biofilm samples of either unplasticized polyvinylchloride (P

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Vickery, Karen. "Special Issue: Microbial Biofilms in Healthcare: Formation, Prevention and Treatment." Materials 12, no. 12 (2019): 2001. http://dx.doi.org/10.3390/ma12122001.

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Biofilms are a structured community of microorganisms that are attached to a surface. Individual bacteria are embedded in a bacterial-secreted matrix. Biofilms have significantly increased tolerance to removal by cleaning agents and killing by disinfectants and antibiotics. This special issue is devoted to diagnosis and treatment of biofilm-related diseases in man. It highlights the differences between the biofilm and planktonic (single cell) lifestyles and the diseases biofilms cause from periodontitis to breast implant capsular contracture. Biofilm-specific treatment options are detailed in

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Carrascosa, Conrado, Dele Raheem, Fernando Ramos, Ariana Saraiva, and António Raposo. "Microbial Biofilms in the Food Industry—A Comprehensive Review." International Journal of Environmental Research and Public Health 18, no. 4 (2021): 2014. http://dx.doi.org/10.3390/ijerph18042014.

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Biofilms, present as microorganisms and surviving on surfaces, can increase food cross-contamination, leading to changes in the food industry’s cleaning and disinfection dynamics. Biofilm is an association of microorganisms that is irreversibly linked with a surface, contained in an extracellular polymeric substance matrix, which poses a formidable challenge for food industries. To avoid biofilms from forming, and to eliminate them from reversible attachment and irreversible stages, where attached microorganisms improve surface adhesion, a strong disinfectant is required to eliminate bacterial

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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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Ziamko, V. Y., V. K. Okulich, A. M. Dzyadzko, et al. "THE DEPENDENCE OF MICROORGANISMS BIOFILM FORMATION ON THE FEATURES OF THE INFECTIOUS PROCESS." Vestnik of Vitebsk State Medical University 20, no. 2 (2021): 56–64. http://dx.doi.org/10.22263/2312-4156.2021.2.56.

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Objectives. To study the dependence of the formation intensity of microbial biofilms by isolates from patients on the severity and localization of the infectious process. Material and methods. The study conducted from 2016 to 2020 included 894 clinical isolates from 720 patients with infectious pathology of various localization and severety. The formation intensity of microbial biofilms by isolates received from these patients has been studied, depending on the severity and localization of the infectious process. Results. The property to form biofilms was found out in the overwhelming majority

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Lucero, Joaquin, and Michele K. Nishiguchi. "Host-Associated Biofilms: Vibrio fischeri and Other Symbiotic Bacteria Within the Vibrionaceae." Microorganisms 13, no. 6 (2025): 1223. https://doi.org/10.3390/microorganisms13061223.

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Biofilm formation is important for microbial survival, adaptation, and persistence within mutualistic and pathogenic systems in the Vibironaceae. Biofilms offer protection against environmental stressors, immune responses, and antimicrobial treatments by increasing host colonization and resilience. This review examines the mechanisms of biofilm formation in Vibrio species, focusing on quorum sensing, cyclic-di-GMP signaling, and host-specific adaptations that influence biofilm structure and function. We discuss how biofilms differ between mutualistic and pathogenic species based on environment

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Hirotani, Hiroshi, and Miyuki Yoshino. "Microbial indicators in natural biofilms developed in the riverbed." Water Science and Technology 62, no. 5 (2010): 1149–53. http://dx.doi.org/10.2166/wst.2010.353.

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Microbial indicators such as heterotrophic bacteria, total coliforms, and Escherichia coli in naturally developed riverbed biofilms were investigated. Pebbles covered with natural biofilm were sampled directly from the riverbed at sampling stations ranging from the upstream region within a quasi-national park to the midstream in the urban district. Heterotrophic bacteria densities in biofilm positively correlated with stream discharge. E. coli densities in biofilm positively correlated with temperature, which suggests the growth in the biofilm. It was considered that the attachment of plankton

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Ntarlagiannis, Dimitrios, and Andrew Ferguson. "SIP response of artificial biofilms." GEOPHYSICS 74, no. 1 (2009): A1—A5. http://dx.doi.org/10.1190/1.3031514.

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In recent years, research into the use of geophysical methods for monitoring microbial activity within the subsurface has advanced. One of the most promising methods, induced polarization (IP), has indirectly shown sensitivity to changes in the presence of microbial cells and especially biofilms. The aim of this study is to conclusively show, and quantify if possible, the effect of biofilm accumulation on IP signals. To ensure the controlled formation of biofilm we created an “artificial” alginate gel biofilm, which was introduced into an experimental column at varying amounts. The IP response

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Massaglia, Giulia, Isabella Fiorello, Adriano Sacco, Valentina Margaria, Candido Pirri, and Marzia Quaglio. "Biohybrid Cathode in Single Chamber Microbial Fuel Cell." Nanomaterials 9, no. 1 (2018): 36. http://dx.doi.org/10.3390/nano9010036.

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The aim of this work is to investigate the properties of biofilms, spontaneously grown on cathode electrodes of single-chamber microbial fuel cells, when used as catalysts for oxygen reduction reaction (ORR). To this purpose, a comparison between two sets of different carbon-based cathode electrodes is carried out. The first one (Pt-based biocathode) is based on the proliferation of the biofilm onto a Pt/C layer, leading thus to the creation of a biohybrid catalyst. The second set of electrodes (Pt-free biocathode) is based on a bare carbon-based material, on which biofilm grows and acts as th

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Keinänen, M. M., P. J. Martikainen, L. K. Korhonen, and M. H. Suutari. "Microbial community structure in biofilms and water of a drinking water distribution system determined by lipid biomarkers." Water Science and Technology 47, no. 5 (2003): 143–47. http://dx.doi.org/10.2166/wst.2003.0303.

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The development of microbial communities in biofilms of a drinking water distribution system was monitored, and compared to the microbial communities in water. The microbial communities were studied by phospholipid fatty acid (PLFA) profiles. In drinking water samples the most common PLFAs, with the proportion of 60.9%, were monoenoic fatty acids, such as 16:1ω7c and 18:1ω7c, indicating high abundance of gram-negative bacteria. Instead, in biofilm samples saturated fatty acids, such as 16:0 and 18:0, indicating general biomass, accounted for 54.9-78.4% of the total PLFAs. The proportions of mo

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Mahmmudi, Z., and A. A. Gorzin. "Biofilm of Pseudomonas aeruginosa in Nosocomial Infection." Journal of Molecular Biology Research 7, no. 1 (2017): 29. http://dx.doi.org/10.5539/jmbr.v7n1p29.

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Bacteria in natural, industrial and clinical settings predominantly live in biofilms, i.e., sessile structured microbial communities encased in self-produced extracellular matrix material. One of the most important characteristics of microbial biofilms is that the resident bacteria display a remarkable increased tolerance toward antimicrobial attack. Biofilms formed by opportunistic pathogenic bacteria are involved in devastating persistent medical device-associated infections, and chronic infections in individuals who are immune-compromised or otherwise impaired in the host defense. Because t

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Gingichashvili, Sarah, Osnat Feuerstein, and Doron Steinberg. "Topography and Expansion Patterns at the Biofilm-Agar Interface in Bacillus subtilis Biofilms." Microorganisms 9, no. 1 (2020): 84. http://dx.doi.org/10.3390/microorganisms9010084.

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Bacterial biofilms are complex microbial communities which are formed on various natural and synthetic surfaces. In contrast to bacteria in their planktonic form, biofilms are characterized by their relatively low susceptibility to anti-microbial treatments, in part due to limited diffusion throughout the biofilm and the complex distribution of bacterial cells within. The virulence of biofilms is therefore a combination of structural properties and patterns of adhesion that anchor them to their host surface. In this paper, we analyze the topographical properties of Bacillus subtilis’ biofilm-a

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Islam, M. Shahinoor, Yanyan Zhang, Kerry N. McPhedran, Yang Liu, and Mohamed Gamal El-Din. "Next-Generation Pyrosequencing Analysis of Microbial Biofilm Communities on Granular Activated Carbon in Treatment of Oil Sands Process-Affected Water." Applied and Environmental Microbiology 81, no. 12 (2015): 4037–48. http://dx.doi.org/10.1128/aem.04258-14.

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ABSTRACTThe development of biodegradation treatment processes for oil sands process-affected water (OSPW) has been progressing in recent years with the promising potential of biofilm reactors. Previously, the granular activated carbon (GAC) biofilm process was successfully employed for treatment of a large variety of recalcitrant organic compounds in domestic and industrial wastewaters. In this study, GAC biofilm microbial development and degradation efficiency were investigated for OSPW treatment by monitoring the biofilm growth on the GAC surface in raw and ozonated OSPW in batch bioreactors

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van Loosdrecht, M. C. M., D. Eikelboom, A. Gjaltema, A. Mulder, L. Tijhuis, and J. J. Heijnen. "Biofilm structures." Water Science and Technology 32, no. 8 (1995): 35–43. http://dx.doi.org/10.2166/wst.1995.0258.

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The influences of reactor conditions (substrate loading rate and shear) and microbial characteristics (yield and growth rate) on the structure of biofilms is discussed. Based on research on the formation of biofilms in Biofilm Airlift Suspension (BAS) reactors a hypothesis is postulated that the ratio between biofilm surface loading and shear rate determines the biofilm structure. When shear forces are relatively high only a patchy biofilm will develop, whereas at low shear rates the biofilm becomes highly heterogeneous with many pores and protuberances. In case of a right balance smooth and s

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Angoshtari, Roshan, Kim T. Scribner, and Terence L. Marsh. "The impact of primary colonizers on the community composition of river biofilm." PLOS ONE 18, no. 11 (2023): e0288040. http://dx.doi.org/10.1371/journal.pone.0288040.

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As a strategy for minimizing microbial infections in fish hatcheries, we have investigated how putatively probiotic bacterial populations influence biofilm formation. All surfaces that are exposed to the aquatic milieu develop a microbial community through the selective assembly of microbial populations into a surface-adhering biofilm. In the investigations reported herein, we describe laboratory experiments designed to determine how initial colonization of a surface by nonpathogenic isolates from sturgeon eggs influence the subsequent assembly of populations from a pelagic river community, in

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Alvarez-Ordóñez, Avelino, Laura M. Coughlan, Romain Briandet, and Paul D. Cotter. "Biofilms in Food Processing Environments: Challenges and Opportunities." Annual Review of Food Science and Technology 10, no. 1 (2019): 173–95. http://dx.doi.org/10.1146/annurev-food-032818-121805.

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This review examines the impact of microbial communities colonizing food processing environments in the form of biofilms on food safety and food quality. The focus is both on biofilms formed by pathogenic and spoilage microorganisms and on those formed by harmless or beneficial microbes, which are of particular relevance in the processing of fermented foods. Information is presented on intraspecies variability in biofilm formation, interspecies relationships of cooperativism or competition within biofilms, the factors influencing biofilm ecology and architecture, and how these factors may infl

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Özçoban, Afranur, Ayşe İlayda Boyacı, and Hale İnci Öztürk. "Microbial Exopolysaccharides, Their Structures, Formation Mechanisms, and Effects on Human Health: Food-Related Microorganisms." Turkish Journal of Agriculture - Food Science and Technology 12, s2 (2024): 2429–40. https://doi.org/10.24925/turjaf.v12is2.2429-2440.6955.

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A biofilm is a complex matrix formed by microorganisms that includes exopolysaccharides, proteins, extracellular DNA, various enzymes, and the microorganisms themselves. Biofilm cell is a more stable form of microorganism than planktonic cell. Microbial cells attach themselves to the surface after certain signals or changes, colonize to create a more favorable environment for their growth and viability, and secrete exopolysaccharide. This component is the basic matrix of biofilm. The diversity of exopolysaccharides within biofilms varies significantly depending on their specific composition, c

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Teper, Paulina, Anna Sotirova, Agnieszka Kowalczuk, Barbara Mendrek, and Tsvetelina Paunova-Krasteva. "Effects of cationic polymers on the viability of microbial biofilms." Folia Medica 65, no. 1 (2023): 124–30. http://dx.doi.org/10.3897/folmed.65.e76154.

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Introduction: The number of published biofilm studies and novel ways for studying them has risen dramatically in recent years, ow-ing to the broad application of biofilms in medicine. Some bacteria develop biofilms that are highly resistant to antimicrobial agents, resulting in persistent infections. This necessitates the development of alternative methods for combating biofilms. In this regard, the application of cationic polymers is a good candidate for realization of this strategy.&nbsp; Aim: The aim of our study was to investigate the potential of a newly synthesized covalently attache

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Nwafor, Ifeoma Roseline, Yusuf Alhassan, Joseph Ifeanyi Udoh, et al. "Plant-derived Bioactive Compounds and Their Mechanistic Roles in Combating Microbial Biofilms." Microbiology Research Journal International 34, no. 9 (2024): 74–85. http://dx.doi.org/10.9734/mrji/2024/v34i91482.

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Biofilms are a group of microorganisms that exist on living or non-living surfaces, embedded within extracellular matrices produced by microbial cells. They primarily cause antimicrobial resistance and treatment failure in clinical settings. Biofilms resist conventional antimicrobials because of their polymicrobial nature, ability to evade host immune detection, and increased tolerance to antimicrobial agents. Consequently, considerable attention is given to finding alternative anti-biofilm agents. Medicinal plants contain diverse biologically active compounds reported to possess antimicrobial

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Davey, Mary Ellen, and George A. O'toole. "Microbial Biofilms: from Ecology to Molecular Genetics." Microbiology and Molecular Biology Reviews 64, no. 4 (2000): 847–67. http://dx.doi.org/10.1128/mmbr.64.4.847-867.2000.

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SUMMARY Biofilms are complex communities of microorganisms attached to surfaces or associated with interfaces. Despite the focus of modern microbiology research on pure culture, planktonic (free-swimming) bacteria, it is now widely recognized that most bacteria found in natural, clinical, and industrial settings persist in association with surfaces. Furthermore, these microbial communities are often composed of multiple species that interact with each other and their environment. The determination of biofilm architecture, particularly the spatial arrangement of microcolonies (clusters of cells

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Parasana, Dixit K., Bhavesh B. Javia, Dhaval T. Fefar, Dilipsinh B. Barad, Sanjay N. Ghodasara, and Irsadullakhan H. Kalyani. "Bacterial Biofilms - A Therapeutic Challenge." INTERNATIONAL JOURNAL OF PLANT AND ENVIRONMENT 8, no. 04 (2022): 44–47. http://dx.doi.org/10.18811/ijpen.v8i04.09.

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A bacterial biofilm is a community of bacteria or colony, adhered to a stationary living or non-living surface within a matrix of selfproducedextracellular polymeric material and microbial cells. Bacterial biofilms can result in nosocomial infections and are typicallyharmful in nature. According to the National Institutes of Health (NIH), biofilm formation is the cause of 80% of chronic illnesses and65% of all microbial infections. Bacterial biofilms exhibit resistance to both the host immune system and antibiotics. Infection linked tobiofilms can result in significant productivity losses for

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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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Konieczny, Michał, Peter Rhein, Katarzyna Czaczyk, Wojciech Białas, and Wojciech Juzwa. "Imaging Flow Cytometry to Study Biofilm-Associated Microbial Aggregates." Molecules 26, no. 23 (2021): 7096. http://dx.doi.org/10.3390/molecules26237096.

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The aim of the research was to design an advanced analytical tool for the precise characterization of microbial aggregates from biofilms formed on food-processing surfaces. The approach combined imaging flow cytometry with a machine learning-based interpretation protocol. Biofilm samples were collected from three diagnostic points of the food-processing lines at two independent time points. The samples were investigated for the complexity of microbial aggregates and cellular metabolic activity. Thus, aggregates and singlets of biofilm-associated microbes were simultaneously examined for the pe

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Liu, Xiaoli, Huaiying Yao, Xihong Zhao, and Chaorong Ge. "Biofilm Formation and Control of Foodborne Pathogenic Bacteria." Molecules 28, no. 6 (2023): 2432. http://dx.doi.org/10.3390/molecules28062432.

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Biofilms are microbial aggregation membranes that are formed when microorganisms attach to the surfaces of living or nonliving things. Importantly, biofilm properties provide microorganisms with protection against environmental pressures and enhance their resistance to antimicrobial agents, contributing to microbial persistence and toxicity. Thus, bacterial biofilm formation is part of the bacterial survival mechanism. However, if foodborne pathogens form biofilms, the risk of foodborne disease infections can be greatly exacerbated, which can cause major public health risks and lead to adverse

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Virdis, Bernardino, Diego Millo, Bogdan C. Donose, Yang Lu, Damien J. Batstone, and Jens O. Krömer. "Analysis of electron transfer dynamics in mixed community electroactive microbial biofilms." RSC Advances 6, no. 5 (2016): 3650–60. http://dx.doi.org/10.1039/c5ra15676a.

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Electrochemically active microbial biofilms are capable to produce electric current when grown onto electrodes. This work investigates the dynamics of electron transfer inside the biofilm as well as at the biofilm/electrode interface.

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Vigneron, Adrien, Eric B. Alsop, Brian Chambers, Bartholomeus P. Lomans, Ian M. Head, and Nicolas Tsesmetzis. "Complementary Microorganisms in Highly Corrosive Biofilms from an Offshore Oil Production Facility." Applied and Environmental Microbiology 82, no. 8 (2016): 2545–54. http://dx.doi.org/10.1128/aem.03842-15.

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ABSTRACTOffshore oil production facilities are frequently victims of internal piping corrosion, potentially leading to human and environmental risks and significant economic losses. Microbially influenced corrosion (MIC) is believed to be an important factor in this major problem for the petroleum industry. However, knowledge of the microbial communities and metabolic processes leading to corrosion is still limited. Therefore, the microbial communities from three anaerobic biofilms recovered from the inside of a steel pipe exhibiting high corrosion rates, iron oxide deposits, and substantial a

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Nielsen, Per Halkjær, Andreas Jahn, and Rikke Palmgren. "Conceptual model for production and composition of exopolymers in biofilms." Water Science and Technology 36, no. 1 (1997): 11–19. http://dx.doi.org/10.2166/wst.1997.0002.

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The presence and the transformations of organic fractions within biofilms are not usually included in biofilm models, mainly owing to the lack of knowledge of the important processes, the stoichiometry and the kinetics. A conceptual biofilm model taking into account microbial physiology with regard to production of extracellular polymers and their transformation within the biofilm is suggested. The suggested components in the biofilm are the cell biomass and the various extracellular polymeric substances (EPS), such as polysaccharides, protein, humic substances and nucleic acids. In addition,

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Purbowati, Rini. "Hubungan Biofilm dengan Infeksi: Implikasi pada Kesehatan Masyarakat dan Strategi Mengontrolnya." Jurnal Ilmiah Kedokteran Wijaya Kusuma 5, no. 1 (2018): 1. http://dx.doi.org/10.30742/jikw.v5i1.1.

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Biofilms are formed in the surfaces of mucosal of the body cavity can be a major source of infection . Infection by microbial biofilm formers are difficult to treat because of their greater resistance to antimicrobial agents than individual cells . Therefore biofilm -related infections and increased the economic burden of the country. The purpose of this literature review is to examine literature on biofilms and biofilm-associated microbes and their contribution to the disease burden of man with the aim of drawing attention to their public health implication.Biofilm are defined as “collections

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Kurniawan, Andi, and Tatsuya Yamamoto. "Accumulation of NH4+ and NO3− inside Biofilms of Natural Microbial Consortia: Implication on Nutrients Seasonal Dynamic in Aquatic Ecosystems." International Journal of Microbiology 2019 (June 2, 2019): 1–7. http://dx.doi.org/10.1155/2019/6473690.

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Microbial biofilms are ubiquitous in aquatic ecosystems. Inside the biofilm is the nutrient-rich microenvironment promoted by the accumulation of the nutrient ions such as NH4+ and NO3− from surrounding water. The present study investigated the characteristics of NH4+ and NO3− accumulation into the biofilm of natural microbial consortia collected from Lake Biwa, Japan. The results showed the following: (1) the concentrations of NH4+ and NO3− inside the biofilm were much higher than those in the surrounding water; (2) the nutrient ion concentration inside the biofilm changed in synchrony with t

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