Comparative analysis of the biological characteristics of three strains of Lactobacillus reuteri

Abstract:

[Objective] The study researched the biological characteristics of three Lactobacillus reuteri strains, providing guidance in industrial production. [Methods] We analyzed and compared diverse characteristics and capabilities of three Lactobacillus reuteri strains preserved in the lab, such as growth curve, pH curve, tolerance to artificial gastric intestinal juice, tolerance to porcine bile salt, adhesive capacity, antimicrobial activity, and tolerance to antibiotics. [Results] The growth trend of these 3 strains was similar. All of the 3 strains had a good tolerance to artificial gastric intestinal juice, and could inhibited the growth of Escherichia coli and Staphylococcus aureus effectively. L0 and L2 showed poor tolerance in high porcine bile salt environment, while the performance of L1 was satisfactory. In addition, L1 and L2 had strong adhesive ability and the tolerances of 3 strains to 20 antibiotics were different. [Conclusion] L1 can be further applied in the industrial production since its biological characteristics are significantly better than the other two strains.