FIG. 3.

Cell counts of Listeria innocua LMG 13568 (in log CFU ml⁻¹) growing as a monoculture (×), in the presence of the nonbacteriocinogenic Lactobacillus sakei I (⋄), in the presence of Lactobacillus sakei CTC 494 (○), and growing as a monoculture after addition of sakacin K-containing cell-free culture supernatant of Lactobacillus sakei CTC 494 leading to an initial bacteriocin activity of 20 AU ml⁻¹ (□) or 100 AU ml⁻¹ (▵) in MRS medium at 20°C and constant pH 5.2 in the presence of 40 g liter⁻¹ of sodium chloride. The arrow indicates the addition of cell-free culture supernatant or the start of bacteriocin production. Standard deviations (not shown) were below 5% of the mean value of the cell counts.