The Effect of Probiotic Fermented Milk on Salivary Streptococcus mutans count
Keywords:
Probiotic fermented milk, Salivary Streptococcus mutans count, Lactobacillus paracaseiAbstract
Objective: To investigate the effects of probiotic milk containing Lactobacillus paracasei on Streptococcus mutans (S. mutans) counts in saliva. Subjects and methods: Forty participants were recruited in this single-blinded, randomized and controlled crossover study. During the intervention periods, the participants were asked to drink 15 ml of either probiotic milk or control water after breakfast every day for 10 days. The pre- and post- intervention salivary samples were subjected to microbiological evaluation. The numbers of S. mutans were determined by plating counting, the bacteria were identified by colony morphology. Results: There was a significant reduction in the S. mutans count after drinking probiotic milk (p<0.001). On the contrary, no significant change in the S. mutans count between the baseline and after drinking water. Moreover, the S. mutans count after probiotic milk consumption was significantly lower than after water consumption (p<0.001). There were no significant differences in the S. mutans count between probiotic milk and water consumption at the baseline. Conclusion: The daily consumption of milk containing probiotic bacteria can reduce levels of S. mutans and may contribute to the prevention of dental caries.
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