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  • 1
    ISSN: 1432-072X
    Keywords: Rapid methods ; Cell wall teichoic acids ; Staphylococci
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Investigations of cell wall teichoic acid structures of various staphylococci were carried out by a rapid method based on the gas-liquid chromatographic separation of products obtained after treatment of phenol-extracted cells with 70% hydrofluoric acid. In most of the strains teichoic acids of the poly(glycerolphosphate) and/or poly(ribitolphosphate) type were found. Teichoic acids of the poly(glycerolphosphate-N-acetylglucosaminephosphate) type and polymers consisting of N-acetylglucosaminephosphate were present in few strains. The results obtained by the rapid chemical screening method were compared with data obtained by serological analysis of teichoic acid structures using specific antisera and the lectin wheat germ agglutinin. Teichoic acid components occurring in low concentrations could only be detected with the chemical and not with the serological method. A number of strains of species of the genus Staphylococcus have been studied using these rapid methods. With a few exceptions, the teichoic acid structure proved to be a constant marker within a given species.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-072X
    Keywords: Arylamine N-acetyltransferase ; Metabolism of aromatic amines ; Soil microorganisms ; Bacillus cereus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The raw extracts of a series of microorganisms were screened for the presence of acetyl-coenzyme A: arylamine N-acetyltransferase (AAAT) using a radioactive assay with 3H-acetyl-coenzyme A and aniline as substrates. Enzyme activities were primarily detected in the soluble fractions of Bacillus and Nocardia species, and in some further soil organisms. Only strains of Bacillus cereus were able to acetylate 4-nitroaniline and 3,5-dimethyl-4-nitroaniline. The fermentation conditions for the production of the enzyme were optimized. The AAAT from one strain of Bacillus cereus was purified 24-fold and characterized.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 37 (1982), S. 0 
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The nature and extent of bacterially induced allergies are difficult to define. Since peptidoglycan, the main component of the cell wall of almost all bacteria, has been available in a highly purified, chemically and immunologically well-defined form, investigation of the allergological significance of this cell component is feasible. Intracutaneous tests were carried out on 181 test, subjects with five different peptidoglycan (PG) preparations from Staphylococcus aureus, Staphylococcus epidermis and Staphylococcus pyogenes. The results of the investigation were compared with the result of determination of serum PG antibodies and serum IgE concentrations. It was shown that test subjects with dual and late reactions to three three different staphylococcal PGs displayed significantly higher PG antibody titers than test subjects with negative reactions. Such a relationship could not he found with the cutaneous reactions to streptococcal PG. The total serum IgE values were very much higher in test subjects with immediate reactions to staphylococcal PG than in test subjects with a negative reaction. Typical Arthus reaction or late granulomatous reactions were not observed. Humoral antibodies are involved at least in part in the elicitation of dual and late reactions. Thus, there are interesting parallels to allergy to fungal spores and organic dusts.
    Type of Medium: Electronic Resource
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