biofilm


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Related to biofilm: Quorum sensing

Biofilm

An adhesive substance, the glycocalyx, and the bacterial community which it envelops at the interface of a liquid and a surface. When a liquid is in contact with an inert surface, any bacteria within the liquid are attracted to the surface and adhere to it. In this process the bacteria produce the glycocalyx. The bacterial inhabitants within this microenvironment benefit as the biofilm concentrates nutrients from the liquid phase. However, these activities may damage the surface, impair its efficiency, or develop within the biofilm a pathogenic community that may damage the associated environment. Microbial fouling or biofouling are the terms applied to these actual or potentially undesirable consequences.

Microbial fouling affects a large variety of surfaces under various conditions. Microbial biofilms may form wherever bacteria can survive; familiar examples are dental plaque and tooth decay. Dental plaque is an accumulation of bacteria, mainly streptococci, from saliva. The process of tooth decay begins with the bacteria colonizing fissures in and contact points between the teeth. Dietary sucrose is utilized by the bacteria to form extracellular glucans that make up the glycocalyx and assist adhesion to the tooth. Within this microbial biofilm or plaque the metabolic by-products of the bacterial inhabitants are trapped; these include acids that destroy the tooth enamel, dentin, or cementum.

biofilm

[′bī·ō‚film]
(microbiology)
A microbial (bacterial, fungal, algal) community, enveloped by the extracellular biopolymer which these microbial cells produce, that adheres to the interface of a liquid and a surface.
References in periodicals archive ?
Babauta is an expert in biofilm electrochemistry and the integration of tools to study biofilms with electrochemical methods.
The data presented demonstrate the potential of bacteriophage therapeutics by clearly showing AB-PA01s effectiveness in reducing biofilm in vivo, a major obstacle in the treatment of Pseudomonas aeruginosa and its associated symptoms, said Peter-John Wormald, M.
aureus were established and then exposed to different bacteriophage-derived proteins that catalyze degradation of the key biofilm extracellular polymers peptidoglycan or exopolysaccharide.
The familiar mechanisms of antibiotic resistance, such as efflux pumps, modifying enzymes, and target mutations do not seem to be responsible for the protection of bacteria in a biofilm.
By eliminating biofilm, product contamination will not occur and product loss will be reduced significantly, resulting in consistently high product quality.
Luego de adherirse, las bacterias pueden desarrollarse en forma de biofilm permaneciendo adheridas a una superficie ya sea biotica o abiotica.
Key words: Calcium precipitation, Bacillus licheniformis, Alcaligenes faecalis, biofilm formation and salt stress.
That biofilm is a membrane microbes build around themselves that protects them from our white blood cells, the soldiers of the immune system.
Bacteria survival under stressed conditions was more in biofilm state rather than in Plankton state.