HETEROGENEITY OF BILE-SALTS RESISTANCE IN THE LACTOBACILLUS ISOLATES OF A PROBIOTIC CONSORTIUM

The effect of bile salts was tested on a collection of 38 strains of L actobacillus isolated from a probiotic bacterial consortium. Half of t he strains were slightly affected by 0-3% bile salts showing a delay o f growth below 1 h, to reach an absorbance of 0.3 at 600 nm in MRS bro th, compared to a reference curve without bile salts. According to the heterogeneity of sensitivity, the resistance to bile salts should be checked for the selection of probiotic strains of Lactobacillus.