Exploration de l’activité anti-bactérienne de certaines souches probiotiques isolées à partir du poisson.

Abstract

This study aims to explore the antibacterial activity of lactic acid bacteria with probiotic potential against pathogens. The bacterial strains used in this study were isolated from traditional fermented milk, Raib. After their isolation, characterization and identification by physiological, biochemical and technological methods, the strains were evaluated for their antimicrobial property against pathogenic germs by different methods : disc method, the spot-on-lawn method and the agar diffusion method. The results showed that the antagonist activity of lactic acid bacteria by the disc and spot-on-lawn methods is stronger against Gram-negative bacteria, while with the agar diffusion method shows a large inhibitory spectrum against Gram-positive bacteria.