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Bacterial glycocalyces


  • URI(s)

  • Instance Of

  • Scheme Membership(s)

  • Collection Membership(s)

  • Variants

    • Capsular EPSs (Bacterial glycocalyces)
    • Capsules (Bacterial glycocalyces)
    • Microbial glycocalyces
    • Slime layers (Bacterial glycocalyces)
    • Slimes (Bacterial glycocalyces)
  • Broader Terms

  • Closely Matching Concepts from Other Schemes

  • Sources

    • found: Work cat: Brown, M.L. Examination of mechanisms of enhanced resistance to iodine in biofilms of Pseudomonas aeruginosa, [1994]:abstr. (Biofilms are complex conglomerations of microbial cells, organic molecules, and inorganic molecules enmneshed in a glycocalyx matrix. ... This study demonstrates that povidone-iodine resistance in a biofilm of P. aeruginosa is due to the protective layering of cells within the interconnected glycocalyx which increases the time required to detach cells and, therefore, the time required for iodine to contact cells in the deepest layers of the biofilm)
    • found: Annual review of microbiology, 1981:p. 301 (We define the bacterial glycocalyx as those polysaccharide-containing structures, of bacterial origin, lying outside the integral elements of the outer membrane of Gram-negative cells and the peptidoglycan of Grampositive cells) p. 307 (If we can infer, from the almost universal possession of glycocalyces by bacteria in nature and disease, that this structure is essential to bacterial survival in the presence of antibacterial agents, then the loss of the glycocalyx in vitro must be a matter of very serious concern in extrapolating from laboratory studies to microbial ecology or microbial pathogenicity)
    • found: Canadian journal of veterinary research, Apr. 1989:p. 170 (Strains of Pseudomonas aeruginosa within infected lungs of human cystic fibrosis patients produce a mucoid polyanionic matrix and it appears this bacterial glycocalyx is important in persistence of this bacterium within the respiratory tracts of affected individuals. Similarly pathogens in patients with chronic osteomyelitis and valvular endocarditis show substantial glycocalyces and these structures appear to impart properties of persistence and possibly resistance to antimicrobial agents)
    • found: Journal of histochemistry & cytochemistry, Nov. 2004:p. 1427( ... Summary: The microbial glycocalyx is composed of a variety of polyanionic exopolysaccharides and plays important roles in microbial attachment to different substrata and to other cells.... The bacterial glycocalyx has been defined as polysaccharide components lying outside the outer membrane of gram-negative cells or the peptidoglycan layer of gram-positive cells. This report uses the term glycocalyx to refer to the layer of exopolysaccharides (EPSs) surrounding the microbial cell, whether covalently bound or not. ... On the basis of cell association, the glycocalyx on the cell surface has been called capsular EPS, or "slime," if unbound. In some cases, depending on the microbial species and environment, the glycocalyx has been described as forming polymeric strands that wrap around the surface, or strands that interact with one another to form helical duplexes. The glycocalyx consists of a highly hydrated polyanionic matrix (90% water) surrounding the bacterial cell and can be composed of hundreds to thousands of monomeric EPS units)
    • found: Netter, F.H. The Netter collection of medical illustrations. Volume 5, Urinary system, 2012:p. 169 (In dwelling urinary catheters also increase the infection risk by facilitating migration of uropathogens into the bladder. Bacteria adhere to the catheter surface and contribute to the creation of a biofilm, which contains bacteria, bacterial glycocalyces, host proteins, and urinary salts ... )
    • found: Transport in biological media, 2013:p. 9 (It has been proposed that the glycocalyx serves several important functions. For example, the bacterial glycocalyx mediates cell attachment, retains humidity during exposure to dry environments, protects against molecular and cellular antibacterial agents (antibiotics, surfactants, bacteriophages, phagocytes) and other vital functions)
    • found: Pepper, I.L. Environmental microbiology , 2015:pp. 15-16 (Bacterial glycocalyx. Finally, the exterior of the cell can have some important features. Some bacteria have an extracellular layer composed primarily of polyscaccharide, but which can also contain proteins and even nucleic acids known as extracellular or eDNA. This layer is called a glycocalyx, also known as a slime layer (more diffuse and irregular) or capsule (more defined and distinct). The resulting sticky layer provides protection against dessication, predation, phagocytosis, and chemical toxicity, such as from antimicrobials, and acts as a means of attachment to surfaces)
  • LC Classification

    • QR77.5
  • Change Notes

    • 2017-01-19: new
    • 2017-05-15: revised
  • Alternate Formats

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