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In the marine environment, most solid surfaces are covered by microbial biofilms, mainly composed of bacteria and diatoms. The negative effects of biofilms on materials and equipment are numerous and pose a major problem for industry and human activities. Since marine micro-organisms are an important source of bioactive metabolites, it is possible that they synthesize natural ecofriendly molecules that inhibit the adhesion of organisms. In this work, the antibiofilm potential of marine bacteria was investigated using sp. II2003 as a target. This strain is potentially a pioneer strain of bacteria that was previously selected from marine biofilms for its strong biofilm-forming ability. The culture supernatants of 86 marine heterotrophic bacteria were tested for their ability to inhibit sp. II2003 biofilm formation and the sp. IV2006 strain was identified as producing a strong antibiofilm activity. The sp. IV2006 culture supernatant (SN) inhibited sp. II2003 adhesion without killing the bacteria or inhibiting its growth. Moreover, SN had no effect on the sp. II2003 cell surface hydrophilic/hydrophobic and general Lewis acid-base characteristics, but modified the surface properties of glass, making it on the whole more hydrophilic and more alkaline and significantly reducing bacterial cell adhesion. The glass-coating molecules produced by sp. IV2006 were found to probably be polysaccharides, whereas the antibiofilm molecules contained in SN and acting during the 2 h adhesion step on glass and polystyrene surfaces would be proteinaceous. Finally, SN exhibited a broad spectrum of antibiofilm activity on other marine bacteria such as species that are pathogenic for fish, and human pathogens in both the medical environment, such as and , and in the food industry, such as . Thus, a wide range of applications could be envisaged for the SN compounds, both in aquaculture and human health.
This article was published in the following journal.
Name: Microbiology (Reading, England)
Integrating MS-based metabolomics approaches, LC-MS-PCA and molecular networking enabled the targeted isolation of five new pyrrole-derived alkaloids, phallusialides A-E (-), from a marine-derived sp...
Degradation or the removal of aflatoxin B from agriculture commodities is very important because of its acute toxicity and economic loss due to rejection of about 25% contaminated agri produce. The pr...
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This culture system utilizes the special affinity difference of biomedical material coating for different cells to achieve the effect of isolating tumor cells from the blood sample. The co...
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Ninety women with PCOS candidate for ICSI were randomized to 2 groups:Group A: fresh samples of PCOS patients undergoing IVF (no= 45) and Group B: frozen samples of PCOS patients undergoin...
A blood protein (NSILA) which mimics the biological activity of insulin in serum, but is not suppressed by insulin antibodies. During acid-ethanol extraction of Cohn fraction III, 10% of the activity is found in the supernatant (NSILA-S) and the remaining activity in the precipitate (NSILA-P). The latter is a large molecular compound, much less stable than the soluble fraction. NSILA-S is a more potent growth factor than insulin and exhibits sulfation activity.
The phenomenon by which a temperate phage incorporates itself into the DNA of a bacterial host, establishing a kind of symbiotic relation between PROPHAGE and bacterium which results in the perpetuation of the prophage in all the descendants of the bacterium. Upon induction (VIRUS ACTIVATION) by various agents, such as ultraviolet radiation, the phage is released, which then becomes virulent and lyses the bacterium.
A rod-shaped bacterium surrounded by a sheath-like structure which protrudes balloon-like beyond the ends of the cell. It is thermophilic, with growth occurring at temperatures as high as 90 degrees C. It is isolated from geothermally heated marine sediments or hot springs. (From Bergey's Manual of Determinative Bacteriology, 9th ed)
Culture of an isolated organism free from any other associating or contaminating organisms.
The transfer of bacterial DNA by phages from an infected bacterium to another bacterium. This also refers to the transfer of genes into eukaryotic cells by viruses. This naturally occurring process is routinely employed as a GENE TRANSFER TECHNIQUE.
Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism ...