443 and CECT 722) were used for direct inoculation in challenge
experiments. Lactobacillus plantarum CECT 220, Staphylococcus xylosus
CECT 237 and Staphylococcus carnosus CECT 4491 were used as starter
cultures. All the strains were obtained from the Spanish Collection of
Type Cultures (CECT, Valencia, Spain).
Stock cultures of each organism were maintained at −20 °C in the
appropriate cultivation broth containing 20% (v/v) glycerol. The two
Salmonella strains and the two Staphylococcus sp. were cultivated in
Tryptone Soy Broth (TSB) and Tryptone Soy Agar (TSA) (Pronadisa,
Madrid, Spain). Man-Rogosa–Sharpe (MRS) broth and agar (Pronadisa),
adjusted to pH 5.7 was used for the growth of L. plantarum