ACTA Scientiarum Polonorum

Abstract: The aim of this study was to determine the antagonistic properties of six Lactobacillus plantarum strains against Gram-positive, Gram-negative bacteria and chosen yeast strain. Agar slab method and well diffusion assays were used in this study. The ability of bacteria to produce the hydrogen peroxide was investigated. All the chosen L. plantarum strains are able to inhibit used indicator bacterial strains. It was concluded that there appeared lack of bacterial growth zones and it resulted in lactic acid production. The chosen lactic acid bacteria did not inhibit growth of C. albicans yeast. Better results – bigger inhibition zones were obtained using agar slab method then well diffusion assays. All the L. plantarum strains did not reveal production hydrogen peroxide.