Current Understanding Of Multi‐species Biofilms

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BIOFILMS Micro-organisms most commonly exist in nature as communities within biofilms rather than as single free-floating organisms. Biofilms are all around us, from the slime on rocks in streams (even in hot springs), to washing machines, to our own bodies, for example the dental plaque on our teeth.

Increased rates of genomic mutation in a biofilm co-culture

26 Biofilms are major contributors to disease chronicity and are typically multi-species in 27 nature. Pseudomonas aeruginosa and Staphylococcus aureus are leading causes of 28 morbidity and mortality in a variety of chronic diseases but current in vitro dual-29 species biofilms models involving these pathogens are limited by short co-culture

Oral Microbiome: A New Biomarker Reservoir for Oral and

independent) [7]. Together, they form multi-species communities, known as biofilms, which resist changes in their environment [7]. This symbiotic manner is known as coaggregation, where aerobes interact with oxygen and create a localised niche for the anaerobes to thrive [7]. Both types of organisms are therefore,


is the total number of dissolved species. Our current model does not consider transforma-tion of any species in the fluid, so we assume that ri≡0. Biofilm Region The biofilm model used in this dissertation is based on the multi- species biofilm model given by Wanner and Gujer, 1986. The model is a one-dimensional model in space with biofilm

JULY 19 21, 2016 presentation and poster proceedings

biofilms. While much focus has been on bacterial biofilms, the impact of fungal biofilms in industry, as well as in human health, has led to greater interest in these under -studied members of the micro -community. It is not always easy to find the right balance between field relevancy and practicality when developing laboratory methods.

Cryptic Viral Infections In Benthic Biofilm Communities

al. 2012). The matrix of biofilms includes polysaccharides, proteins, and nucleic acids and are protected by a cuticle (Carrolo et al. 2010). Much of our current knowledge regarding biofilms comes from lab-scale studies using single-species biofilms. Such approaches have been highly valuable in developing conceptual

A simplified mathematical model of multi-species biofilm for

standing of biofilms structure has been developed to regard the biofilms as the multispecies communities (Stoodley et al., 2002). However, this multispecies biofilms represent quite complex dynamic systems, and due to this complexity, current understanding of biofilm systems

Modelling microbial competition in nitrifying biofilm reactors

Modelling Microbial Competition in Nitrifying Biofilm Reactors T. P. W. Vannecke, E. I. P. Volcke Department of Biosystems Engineering, Ghent University, Coupure Links 653, 9000

Mathematical Modeling of Microbial Community Dynamics: A

require simulation models to codify our current level of understanding of system dynamics. In the literature, there are a variety of mathematical approaches. In general, the level of complexity and details of models would be determined based on the goal of simulation and the time and length scales of target

Characterization of a naphthalene-degrading multi-species

Our current understanding of biofilms indicates that We enriched a multi-species biofilm able to degrade naphthalene. Ten strains belonging to the Actinobacteria,


However, biofilms were observed in parts of post-disinfected distribution systems including pipe sections (Ridgeway and Olson, 1981) and water meters (Hong et al., 2010). For example, in water meters, multi-species biofilms were observed (Hong et al., 2010). Thus, understanding how disinfection affects multispecies biofilm development is important.

Short Communication Spatial Distribution and Chemical

previous studies on model mono-species biofilms, our current understanding of biofilm physiology is increasing; however, multi-species biofilms are dominant in the natural environment, such as the oral cavity, and interspecies communication shapes the behavior and phenotype of multi-species biofilms (8, 22).

Metabolic Modeling of a Chronic Wound Biofilm Consortium

Multispecies biofilms are sufficiently complex to pre-clude detailed understanding through traditional experi-mental techniques developed for planktonic cultures. A primary challenge is the complex interactions between the biofilm species and the extracellular environment [38]. Most naturally occurring microbial consortia exist

RSC Advances

99 biofilm-isolated polymers. This limitation is also encountered with other biofilms, 100 particularly for multi-species biofilms that are important in natural, medical and 101 industrial settings, mediating, for example, complex biodegradation processes (e.g. 102 activated sludge) and resistance to antimicrobials.27, 28

The limitations of in vitro experimentation in understanding

Nov 27, 2015 tures, and instead, focus on understanding surface associated biofilms. This has become increasingly more relevant as we battle with the issues posed by AMR. We are becoming increasingly aware of significant differences that exist between in vitro biofilms grown in the laboratory, and in vivo biofilms found during actual infection.

Monitoring the effect of chemicals on biological communities

of biofilms to metals and biomass accrual [18], similar to that described between photosynthetic rate and biomass [19]. Because of their role as an interface between the overlying water and the sediments in the river ecosystem, biofilms are a suitable compartment for evaluating the effect of chemicals on river ecosystems. Biofilms inte-

The world of biofilms -

topics including multi-species dental bio-films, potential beneficial uses of biofilms in bioremediation and energy produc-tion, and emerging biofilm eradication techniques and technologies. In addition, it includes detailed reviews on biofilm formation by specific pathogens such as Proteus mirabilis, Staphylococcus aureus The world of biofilms

Review Article Endodontic biofilms: contemporary and future

against multi-species biofilm [21]. Given that the dual-species biofilms or the aged biofilms were more resistant to NaOCl than monospecies biofilms or the young biofilms [22], many researches found that high concentratin NaOCl was the only irrigant effective in disrupting multi-species biofilm and eradicating bacterial cells [23-26].

Studying Bacterial Multispecies Biofilms: Where to Start?

of varying the degree of complexity. This review aims to facilitate multi-species biofilm research in order to expand the current limited knowledge on interspecies interactions. Why Studies Focus on Multispecies Biofilms? Bacteria in biofilms are embedded in a self-produced matrix of hydrated extracellular polymeric substances

Unraveling interspecies interactions across heterogeneities

understanding the biology of natural biofilms (Røder et al., 2016, Tan , 2017). One challenge to multi-species studies is that diversity and spatial organization often leads to functional hetero-geneity within a biofilm (Stewart and Franklin, 2008). Widely applied methods to study model biofilm mostly focus on cells extracted from biofilms.

Pathobiont release from dysbiotic gut microbiota biofilms in

better understanding of how phenotypic and functional disruptions of commensal gut mucosal biofilm communities are regulated will pave the way towards novel therapies. Investigations of biofilms in mono-and multi-species com-munities will shed new light on our understanding of micro-bial metabolism, genetic variability, antibiotic resistance, and


biofilms in seven support materials. Ex-situ, we were able to relate quantitatively the populations of ~56 mixed species biofilms up to 48h, regardless of the support material.In situ a correct quantification remained more elusive, but a qualitative understanding of biofilm structure and composition is clearly possible for most support materials.


studying biofilms. The biofilm as a multi-cellular organism. Damage in fresh agricultural products,processed foods and in the food industry and means for preventing and removing biofilms. Course/Module aims: Gain an understanding of the following topics: 1. What is the biofilm 2. The nature and significance of the industry of biofilm 3.


biofilms as they age. The current knowledge ofmicrobially induced settlement ofH. elegans larvae is limited to biofilms ofspecies cultured with artificial media and natural multi-species biofilms ofunknown species composition (Hadfield et aI., 1994; Huang and Hadfield, 2003; Unabia and Hadfield, 1999). Artificial media can often bias estimates

Current understanding of bacterial biofilms and latent

Current understanding of bacterial biofilms and latent infections: A clinical perspective Conceitos atuais sobre biofilmes e bactérias latentes em casos clínicos de endometrite Ryan A. Ferris1 Equine Reproduction Laboratory, Colorado State University , Fort Collins, Colorado USA. 1Correspondence: [email protected] Abstract

Special Topics Courses in Biological Sciences Spring 2008

BIOL 4301-007 (CRN# 49652) Biofilms Dr. Catherine Wakeman MWF 9:00-9:50 This course focuses on microbial communities in the context of single and multi-species biofilms as well as cooperative and competitive interspecies interactions.

Discriminating multi-species populations in biofilms with

Our current understanding of biofilms in the environment and in health indicates that these structures are typically composed of many different microbial species. However, the lack of reliable techniques for the discrimination of each population that composes a biofilm has meant that studies focusing on multi-species biofilms are scarce and

The Zone Model: A conceptual model for understanding the

likewise supported by the work of Bjarnsholt et al2 (although multi-species biofilms were not). The presence of multispecies biofilms is still debated, but a review by Burmølle et al 5 demonstrates a trend in biofilm infection toward lower bacterial diversity of bacteria and strictly mono-species biofilm.

Tackling Biofilm Formation REVIEW

Biofilms are communities of single or multiple microbial species that form on a range of biotic and abiotic surfaces. Although mixed-species biofilms predominate in most environments, single-species biofilms often exist in a variety of infections and on the surface of medical implants.1 The initial process of biofilm formation involves


infections due to the presence of biofilms developing on medical devices or mucosa, for which there is no fully efficient prevention or eradication method. In biofilms, bacteria undergo specific physiological changes and display a characteristic but ill -understood high level of tolerance to both antimic robial agents and host immune defenses.

Advances in mathematical modelling of biofilm structures

The initial models described biofilms as uniform steady-state films containing a single type of organism, governed exclusively by one-dimensional mass transport and biochemical transformations Rittmann and McCarty [6]. Later, layered dynamic models were developed Wanner and Gujer [7], which included multi-species interactions within the


Increased capability to manipulate and live with biofilms when removal is not possible and/or advantageous. 3. Translational Opportunities There is an imminent opportunity tocreate economic growth through applying recent advances in bioscience research to transform current industrial capability with novel solutions.

Original Article Molecular analysis of biofilms on the

Under most circumstances, biofilms contain multiple species of bacteria [6]. Multi-species biofilm formation is a dynamic process leading to a three-dimensional structure. As compared with planktonic bacteria, bacteria embedded in biofilms can adapt to the environment more easily by secreting polysaccharides, lipids, extracellular DNA, and

© 2016 Yun Shen

produced by multi -species biofilms may lead to a more viscous biofilm matrix and thus reduce the diffusion of disinfectant in biofilms. 32, 34. However, most of these previous studies investigated the disinfection for biofilm -associated pathogens under quiesc ent conditions. While the drinking flow

Impact of free living protozoa and bacterial interactions on

Multispecies biofilms are ubiquitous in most natural and man-made environments; their presence is now subject to ever-increasing attention. Several studies have shown that bacterial species living in complex bacterial communities interact,

EPANET Multi-Species Extension User's Manual

biofilms, suspended nitrifying biomass, and the electron donor (ammonia), electron acceptor (oxygen), and carbon source that supports microbial growth. For the relatively common situation where more than one water source supplies a distribution system, current models are not able to represent meaningful differences in


Biofilms pose a major clinical threat. Current estimates from the US National Institutes of Health suggest biofilms account for over 80% of all clinical infections. Given the relatively recent understanding of biofilms, antibiofilm efficacy testing is

Unraveling the biophysical underpinnings to the success of

Current understanding of biofilm architectural differentia-tion in porous environments largely rests on mono- or dual-species biofilms [11, 12, 15, 17, 18, 21]. This contrasts the massive diversity with hundreds to thousands of bacterial taxa forming biofilms in nature, and notably in streams [22]. A

Discriminating Multi-Species Populations in Biofilms with

polymicrobial communities. Thus, it facilitates the understanding of interspecies interactions and how these are affected by changes in the surrounding environment. Citation: Almeida C, Azevedo NF, Santos S, Keevil CW, Vieira MJ (2011) Discriminating Multi-Species Populations in Biofilms with Peptide Nucleic Acid

Antibiofilm peptides against oral biofilms

Biofilms forming on dental hard or soft tissue are the major cause of caries and endodontic and periodontal disease. Human oral biofilms exhibit high resistance to antimicrobial agents. Antibiofilm peptides constitute a diverse class of host-defense molecules that act to combat invasion and infection with biofilms.