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Of Bacteria (of + bacteria)

Distribution by Scientific Domains
Medical Sciences50%
Life Sciences50%

Kinds of Of Bacteria

  • variety of bacteria
    		•

    Selected Abstracts

    Skin problems related to noninfectious coastal microorganisms

    DERMATOLOGIC THERAPY, Issue 1 2002
    William A. Burke
    While there are a number of coastal microorganisms that can cause infections of the skin, there are many that can cause skin problems that are noninfectious in nature. From cyanobacterial dermatitis to skin problems related to dinoflagellates, to skin signs of ciguatera or scombroid fish poisonings, to "sea lice"/"seabather's eruption," to "swimmer's itch," this article attempts to separate these entities into distinct syndromes caused by a variety of bacteria, phytoplankton and zooplankton. Treatment and prevention of these diseases are also discussed. [source]

    Phylogenetic relationship and antifouling activity of bacterial epiphytes from the marine alga Ulva lactuca

    ENVIRONMENTAL MICROBIOLOGY, Issue 3 2000
    Brief report
    It is widely accepted that bacterial epiphytes can inhibit the colonization of surfaces by common fouling organisms. However, little information is available regarding the diversity and properties of these antifouling bacteria. This study assessed the antifouling traits of five epiphytes of the common green alga, Ulva lactuca. All isolates were capable of preventing the settlement of invertebrate larvae and germination of algal spores. Three of the isolates also inhibited the growth of a variety of bacteria and fungi. Their phylogenetic positions were determined by 16S ribosomal subunit DNA sequencing. All isolates showed a close affiliation with the genus Pseudoalteromonas and, in particular, with the species P. tunicata. Strains of this bacterial species also display a variety of antifouling activities, suggesting that antifouling ability may be an important trait for members of this genus to be highly successful colonizers of animate surfaces and for such species to protect their host against fouling. [source]

    Toll-Like Receptors in Older Adults

    JOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 9 2007
    David Van Duin MD
    Toll-like receptors (TLRs) recognize a limited number of conserved elements in pathogens and, by activating antigen-presenting cells such as dendritic cells and monocytes and macrophages, play a crucial role in the immune response to infection and vaccination. Most data on TLR function in the context of human aging focus on responses to lipopolysaccharide, an integral component of gram-negative bacteria, which signals through TLR4. However, such studies have not led to a consensus conclusion and are limited by differences in epidemiological and laboratory methods. A recent comprehensive evaluation of TLR function in monocytes from older adults was conducted using a multivariable mixed statistical model to account for covariates. It was found that cytokine production after TLR1/2 engagement, which is essential for the recognition of triacylated lipopeptides found in a variety of bacteria, is substantially lower in monocytes from older adults. The upregulation of costimulatory proteins such as CD80, essential for optimal activation of T cells, on monocytes from older adults was less for all TLR ligands tested than for cells from young individuals, and the extent of CD80 upregulation predicted subsequent antibody response to influenza immunization. These and other consequences of aging on human TLR function may impair activation of the immune response and contribute to poorer vaccine responses and greater morbidity and mortality from infectious diseases in older adults. Such age-associated alterations have particular relevance in view of the interest in TLR agonists as therapeutic agents not only for infections, but also for allergic, autoimmune, and malignant disease. [source]

    Growth of Enterococcus mundtii ST15 in medium filtrate and purification of bacteriocin ST15 by cation-exchange chromatography

    JOURNAL OF BASIC MICROBIOLOGY, Issue 6 2005
    Monique Granger
    Bacteriocin ST15 (bacST15), produced by Enterococcus mundtii ST15, inhibited the growth of a variety of bacteria, including exopolysaccharide (EPS)-producing strains isolated from biofilms in stainless steel pipes. Maximal production of bacST15 (51200 AU/ml) was recorded after 20 h of growth in MRS broth (Biolab), which was maintained throughout fermentation. Only 12800 AU/ml bacST15 has been recorded in MRS filtrate with components smaller than 8000 Da, suggesting that nutrients larger than 8000 Da are required for optimal bacST15 production. Cation-exchange chromatography yielded an active peptide, which is 3944.00 Da, according to electron-spray mass spectrometry and tricin-SDS PAGE. BacST15 is smaller than the 4287 Da reported for bacteriocins ATO6 and KS produced by E. mundtii . The iso-electric point of bacST15 is between 7 and 9, and similar to that reported for pediocin PD-1. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]