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Int J Appl Basic Med Res. 2018 Apr-Jun;8(2):111-115. doi: 10.4103/ijabmr.IJABMR_447_16.

Effect of Short-term Consumption of Amul Probiotic Yogurt Containing Lactobacillus acidophilus La5 and Bifidobacterium Lactis Bb12 on Salivary Streptococcus mutans Count in High Caries Risk Individuals.

Author information

Department of Community Dentistry, Government Dental College and Hospital, Aurangabad, Maharashtra, India.
Department of Public Health Dentistry, K. M. Shah Dental College and Hospital, Vadodara, Gujarat, India.
Department of Public Health Dentistry, ITS Dental College, Greater Noida, Muradnagar, Uttar Pradesh, India.
ITS Centre for Dental Studies and Dental Research, Muradnagar, Uttar Pradesh, India.



This study aims to study the effect of short-term consumption of probiotic yogurt containing Lactobacillus acidophilus La5 and Bifidobacterium lactis Bb12 on salivary Streptococcus mutans count in high caries risk individuals.

Materials and Methods:

A double-blind randomized control trial was conducted, and 70 high caries risk individuals with a salivary S. mutans count of more than 106 CFU/ml of saliva were followed for 4 weeks. Participants ingested 100 g yogurt containing L. acidophilus La5 and Bifidobacterium lactis Bb12 or yogurt without the two probiotic bacteria once daily at the end of meals for initial 2 weeks. Salivary S. mutans were enumerated in the laboratory by selective culture media.


A statistically significant reduction (P < 0.05) of salivary S. mutans was recorded after probiotic yogurt consumption with minimal residual effect, which was in contrast to the controls.


L. acidophilus La5 and Bifidobacterium lactis Bb12 present in the yogurt were effective in reducing the S. mutans levels in saliva.


Bifidobacteria; Streptococcus mutans; caries prevention; lactobacilli; probiotics

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