Bacterial strains and yeast species from stock cultures were grown in 10 ml nutrient broth (Merck 5443, CDarmstadt, Germany) or malt extract broth (Merck 5397, Darmstadt, Germany) cultures for 24 h.
Ten milliliters of broth cultures were prepared overnight in nutrient or malt extract broths for 24 h. Test yeasts C. albicans and S. cerevisiae, and Y. enterocolitica were grown in malt extract and nutrient broths at 25 C for 18 h, respectively.