The Effect of Lactobacillus on Growth Suppression of Streptococcus Mutans and Streptococcus Sobrinus and Pro-biotic Effect of Yogurt

We conducted growth inhibition tests on oral microorganisms using three strains of Lactobacillus spp. which are wide- ly known as their probiotic properties. In these experiments, we measured the number of oral microorganisms after di- rectly contacting lactobacillus with them. In addition, we conducted a similar study using yogurts which are well known as a probiotic food.n these yogurts, we identified the type of lactobacilliy 16s rRN A nucleotide analysis. In our study, the growth of most of oral microorganisms were inhibited by lactobacilli, and we also found that yogurts had the highest effectiveness in inhibiting the growth of most of oral microorganisms. The lactobacilli contained in the yogurts were identified as Lactobacillus casei, Lactobacillus paracasei, Lactobacillus helveticus, Lactobacillus casei, and Lactobacillus helveticus.