Biofilm Clearance
Biofilm Clearance - Related Videos
09:03
Growth of Mycobacterium tuberculosis Biofilms
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Cited by 79 •
2012
Mycobacterium tuberculosis forms drug tolerant biofilms when cultured in certain conditions. Here we describe methods for culturing M. tuberculosis biofilms and determining the frequency of drug tolerant persisters. These protocols will be useful for further studies into the mechanisms of drug tolerance in M. tuberculosis.
10:17
Methodologies for Studying B. subtilis Biofilms as a Model for Characterizing Small Molecule Biofilm Inhibitors
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Cited by 28 •
2016
This study presents the development of reproducible methodologies to study biofilm inhibitors and their effects on Bacillus subtilis multicellularity.
03:57
Microtiter Dish Biofilm Formation Assay
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Cited by 2235 •
2011
The assay describes a rapid means to measure early biofilm formation in bacteria and fungi. This method uses a microtiter plate as the substratum for microbial biofilm formation, and the biofilm is visualized using crystal violet strain. The assay provides either a qualitative or quantitative assay for early biofilm formation.
01:09
Hepatic Drug Clearance: Restrictive and Nonrestrictive Clearance
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2025
Hepatic clearance refers to the volume of blood cleared of a drug by the liver per unit of time. It plays a crucial role in drug metabolism and elimination. While hepatic clearance is commonly estimated by subtracting renal clearance from total body clearance, other pathways, such as pulmonary or biliary clearance, may also contribute. However, these pathways are generally less significant than hepatic and renal clearance. Most drugs undergo restrictive clearance, which is proportional to the...
14:42
Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties
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Cited by 6 •
2014
This paper shows an original methodology based on the remote actuation of magnetic particles seeded in a bacterial biofilm and the development of dedicated magnetic tweezers to measure in situ the local mechanical properties of the complex living material built by micro-organisms at interfaces.
FAQs
The extracellular matrix helps hold microbial cells together and anchors the community to a surface. Weakening or degrading this material reduces structural cohesion, making cells more accessible to physical or chemical removal and to antimicrobial or immune activity. This step is important because disrupting the matrix can address the protective organization of the community rather than targeting only exposed cells.
Physical forces can detach cells or disrupt the community’s attachment, while chemical forces can weaken or degrade components that maintain its structure. These actions support clearance through different but complementary routes. Their importance lies in improving exposure of embedded organisms to antimicrobial agents and immune responses, especially when the organized community shows greater tolerance than free-living cells.
Cells embedded within a self-produced matrix are organized in a way that can limit access by antimicrobial agents and immune defenses. This contributes to greater tolerance than in free-living cells and helps explain persistent microbial communities. Biofilm clearance therefore emphasizes both structural disruption and improved access, rather than relying only on direct antimicrobial activity against exposed organisms.
Clearance focuses on removing or disrupting the attached community and its supporting matrix, whereas reducing growth alone may not eliminate organisms that remain attached or embedded. This distinction matters because persistent biofilms can contribute to recurrence. Evaluating structural disruption, detachment, and improved antimicrobial or immune access provides a broader view of whether the community has been effectively addressed.
A study can examine three connected events: weakening or degrading the extracellular matrix, applying physical or chemical forces that promote detachment, and assessing whether antimicrobial or immune access improves afterward. Linking these stages helps researchers determine how a strategy acts and whether it reduces microbial persistence. The sequence can be investigated on tissues, medical devices, or other relevant surfaces.
It is particularly relevant when microbial communities persist on tissues or medical devices, where attachment and matrix formation can complicate control. Studying clearance in these settings helps explain why infections may continue or recur. The resulting knowledge can inform wound-care approaches, infection-control strategies, and efforts to protect surfaces from sustained microbial colonization.
Clearance studies can identify whether a strategy acts on the extracellular matrix, detaches cells, or improves antimicrobial and immune access. Connecting a treatment’s action to these mechanisms supports more targeted therapy design. This research also helps address microbial persistence and recurrence by focusing on the structural features that allow communities to remain established.
Biofilm clearance research can guide engineered materials intended to limit microbial persistence on surfaces. By revealing how attachment, matrix structure, and detachment relate to community survival, biological studies provide relevant design considerations for surface protection. Such materials may be developed alongside clearance strategies to reduce establishment, support infection control, and limit the likelihood of recurring microbial communities.