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    Inhibitory effects of Lactobacillus fermentum on microbial growth and biofilm formation (2015)

    Art
    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Autoren
    Rybalchenko, Oxana V
    Bondarenko, Viktor M
    Orlova, Olga G
    Markov, Alexander G
    Amasheh, S (WE 2)
    Quelle
    Archives of microbiology; 197(8) — S. 1027–1032
    ISSN: 1432-072x
    Sprache
    Englisch
    Verweise
    DOI: 10.1007/s00203-015-1140-1
    Pubmed: 26267163
    Kontakt
    Institut für Veterinär-Physiologie

    Oertzenweg 19 b
    14163 Berlin
    +49 30 838 62600
    physiologie@vetmed.fu-berlin.de

    Abstract / Zusammenfassung

    Beneficial effects of Lactobacilli have been reported, and lactic bacteria are employed for conservation of foods. Therefore, the effects of a Lactobacillus fermentum strain were analyzed regarding inhibitory effects on staphylococci, Candida albicans and enterotoxigenic enterobacteria by transmission electron microscopy (TEM). TEM of bacterial biofilms was performed using cocultures of bacteriocin-producing L. fermentum 97 with different enterotoxigenic strains: Staphylococcus epidermidis expressing the ica gene responsible for biofilm formation, Staphylococcus aureus producing enterotoxin type A, Citrobacter freundii, Enterobacter cloaceae, Klebsiella oxytoca, Proteus mirabilis producing thermolabile and thermostable enterotoxins determined by elt or est genes, and Candida albicans. L. fermentum 97 changed morphological features and suppressed biofilm formation of staphylococci, enterotoxigenic enterobacteria and Candida albicans; a marked transition to resting states, a degradation of the cell walls and cytoplasm, and a disruption of mature bacterial biofilms were observed, the latter indicating efficiency even in the phase of higher cell density.