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    Model experiments to establish behaviour of Yersinia enterocolitica 0:9 strains in various kinds of fresh raw sausage (1996)

    Art
    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Autoren
    Kleemann, Jörg
    Bergann, Theodor (WE 8)
    Quelle
    Journal of Applied Microbiology; 80(1) — S. 10–12
    ISSN: 1364-5072
    Sprache
    Englisch
    Verweise
    DOI: 10.1111/j.1365-2672.1996.tb03182.x
    Kontakt
    Institut für Lebensmittelsicherheit und -hygiene

    Königsweg 69
    14163 Berlin
    +49 30 838 62550
    lebensmittelhygiene@vetmed.fu-berlin.de

    Abstract / Zusammenfassung

    In model experiments different kinds of raw sausages were inoculated with liquid cultures of virulent-plasmid-carrying clinical Yersinia (Y.) enterocolitica (e.) strains of the O:9 serotype, doses being between 104 and 105 cfu g-1. The sausage samples were stored at 3–5° and 13–16°C. During the first 10 d of storage the Y.e. plate count was detected with Desoxycholate-Citrate-Lactose-Sucrose Agar every day, later on in addition to it with phosphate buffer-enrichment and with enrichment according to Schiemann (1982) in intervals of several days' duration. The pH and aw values, the contents of salt and water were detected. The multitude of complexly acting factors and substances prevents obviously the proliferation of Y.e. in fresh dry sausages. Decay dynamics of Y.e. were found to be considerably affected by storage temperature. Cold storage, basically, had a conservation effect and thus delayed the dying process of model strains. Yersinia enterocolitica-contaminated fresh dry sausage may cause potential danger to consumers, because of relatively extended survival periods of the pathogen. Therefore, manufacturers are expected to observe most stringent hygienic rules of Good Manufacturing Practice.