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    Deoxyribonucleic acid base composition and biochemical properties of certain coagulase-negative enterotoxigenic cocci (1975)

    Art
    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Autoren
    Lotter, L.P. (WE 8)
    Genigeorgis, C.A.
    Quelle
    Applied microbiology and biotechnology; 29(2) — S. 152–158
    ISSN: 0175-7598
    Sprache
    Englisch
    Verweise
    Pubmed: 803812
    Kontakt
    Institut für Lebensmittelsicherheit und -hygiene

    Königsweg 69
    14163 Berlin
    Tel.+49 30 838 62550 Fax.+49 30 838 46029
    email:lebensmittelhygiene@vetmed.fu-berlin.de

    Abstract / Zusammenfassung

    Eight coagulase-negative, enterotoxigenic strains of cocci and one weakly coagulase-positive strain isolated from a number of different sources, including cases of food poisoning incidents, were evaluated for their relationship to Staphylococcus aureus on the basis of deoxyribonucleic acid (DNA) buoyant density and physiological studies. One strain of cocci produced enterotoxins A and C, two strains produced types B and C, four strains produced only type C, and one strain only type D. The enterotoxin produced by one strain of cocci was serologically untypable. None of the test organisms produced detectable amounts of enterotoxin in broth cultures. The test strains of cocci exhibited the following profile: all produced catalase; all grew anaerobically and fermented glucse; five were sensitive to lysostaphin; the percentage of guanine plus cytosine content of their DNA varied from 32.7 to 37.6; five produced acid from mannitol both aerobically and anaerobically; two formed delta-hemolysin; five produced phosphatase and acetoin; and all produced heat-stable nuclease. None of the organisms exhibited typical characteristics of S. aureus, S. epidermidis, or S. saprophyticus. On the basis of the present data and data reported elsewhere, these organisms should be considered as variants or mutants of S. aureus