Microbiology

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    Protocols in Current Issue
    Simple Time-lapse Imaging for Quantifying the Hydrostatic Production of Oxygenic Photogranules
    Authors:  Esmee D. Joosten, Jérôme Hamelin and Kim Milferstedt, date: 10/05/2020, view: 423, Q&A: 0
    [Abstract] Oxygenic photogranules (OPGs) are dense, three-dimensional aggregates containing a syntrophic, light-driven microbial community. Their temporal and spatial development interests microbial ecologists working at the bioprocess engineering interface, as this knowledge can be used to optimize biotechnological applications, such as wastewater treatment ...
    Evaluation of Viable Cells in Pseudomonas aeruginosa Biofilms by Colony Count and Live/Dead Staining
    Authors:  Magdalena Pezzoni, Ramón Augusto Pizarro and Cristina Susana Costa, date: 09/20/2020, view: 717, Q&A: 0
    [Abstract] Pseudomonas aeruginosa is a human pathogen capable to form robust biofilms. P. aeruginosa biofilms represent a serious problem because of the adverse effects on human health and industry, from sanitary and economic points of view. Typical strategies to break down biofilms have been long used, such as the use of disinfectants or ...
    A Microbial Bioassay for Direct Contact Assessment of Soil Toxicity Based on Oxygen Consumption of Sulfur Oxidizing Bacteria
    Authors:  Ebenezer Ashun, Umair Ali Toor, Heonseop Eom and Sang-Eun Oh, date: 01/05/2020, view: 1435, Q&A: 0
    [Abstract] A new direct contact assessment of soil toxicity using sulfur oxidizing bacteria (SOB) is proposed for analyzing the toxicity of soils. The proposed method is based on the ability of SOB to oxidize elemental sulfur to sulfuric acid in the presence of oxygen. Since sulfate ions are produced from sulfur by SOB oxidation activity, changes in ...
    Intracellular cAMP Measurements in Candida albicans Biofilms
    Authors:  Liuliu Jiang, Shengyan Chen, Kairui Sun, Peng Zhou and Xin Wei, date: 12/05/2019, view: 1519, Q&A: 0
    [Abstract] Candida albicans is the most common cause of fungal infections worldwide. Infection by C. albicans is closely associated with its ability to form a biofilm, closely packed communities of cells attached to the surfaces of human tissues and implanted devices, in or on the host. When tested for susceptibility to antifungals, such as ...
    Biofilm Formation Assay in Pseudomonas syringae
    Authors:  Xiaolong Shao, Yingpeng Xie, Yingchao Zhang and Xin Deng, date: 05/20/2019, view: 5286, Q&A: 0
    [Abstract] Pseudomonas syringae is a model plant pathogen that infects more than 50 plant species worldwide, thus leading to significant yield loss. Pseudomonas biofilm always adheres to the surfaces of medical devices or host cells, thereby contributing to infection. Biofilm formation can be visualized on numerous matrixes, including ...
    Assembly of a Custom-made Device to Study Spreading Patterns of Pseudomonas putida Biofilms
    Authors:  David R. Espeso, Esteban Martínez-García and Víctor de Lorenzo, date: 05/20/2019, view: 2421, Q&A: 0
    [Abstract] Biofilms are bacterial communities in the shape of exopolysaccharide matrix-encased aggregates attached onto interphases able to resist environmental aggressions. The development of bacteria in the shape of biofilms deeply affects the performance of many industrial processes which work with fluidic systems, where bacteria may settle and prosper. ...
    Biofilm Assays on Fibrinogen-coated Silicone Catheters and 96-well Polystyrene Plates
    Authors:  Cristina Colomer-Winter, José A. Lemos and Ana L. Flores-Mireles, date: 03/20/2019, view: 3377, Q&A: 0
    [Abstract] Biofilm formation is a well-known bacterial strategy that protects cells from hostile environments. During infection, bacteria found in a biofilm community are less sensitive to antibiotics and to the immune response, often allowing them to colonize and persist in the host niche. Not surprisingly, biofilm formation on medical devices, such as ...
    Microfluidics-Based Analysis of Contact-dependent Bacterial Interactions
    Authors:  Robert Cooper, Lev Tsimring and Jeff Hasty, date: 08/20/2018, view: 3582, Q&A: 0
    [Abstract] Bacteria in nature live in complex communities with multiple cell types and spatially-dependent interactions. Studying cells in well-mixed environments such as shaking culture tubes or flasks cannot capture these spatial dynamics, but cells growing in full-fledged biofilms are difficult to observe in real time. We present here a protocol for ...
    Structural Analysis of Bordetella pertussis Biofilms by Confocal Laser Scanning Microscopy
    Authors:  Natalia Cattelan, Osvaldo Miguel Yantorno and Rajendar Deora, date: 08/05/2018, view: 3541, Q&A: 0
    [Abstract] Biofilms are sessile communities of microbial cells embedded in a self-produced or host-derived exopolymeric matrix. Biofilms can both be beneficial or detrimental depending on the surface. Compared to their planktonic counterparts, biofilm cells display enhanced resistance to killing by environmental threats, chemicals, antimicrobials and host ...
    Implementation of Blue Light Switchable Bacterial Adhesion for Design of Biofilms
    Authors:  Fei Chen and Seraphine V. Wegner, date: 06/20/2018, view: 3628, Q&A: 1
    [Abstract] Control of bacterial adhesions to a substrate with high precision in space and time is important to form a well-defined biofilm. Here, we present a method to engineer bacteria such that they adhere specifically to substrates under blue light through the photoswitchable proteins nMag and pMag. This provides exquisite spatiotemporal remote control ...



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