Antagonistic action of indigenous Streptococcus mutans strains

Area of Science:

• Oral Microbiology
• Infectious Diseases

Background:

• Dental caries is a prevalent infectious disease primarily caused by Streptococcus mutans.
• Identifying microorganisms antagonistic to S. mutans is crucial for developing novel caries prevention and control methods.

Purpose of the Study:

• To identify Streptococcus mutans strains exhibiting antagonistic effects against S. mutans within the Oral Microbial Ecology framework.
• To explore the potential of these antagonistic strains for future dental caries management strategies.

Main Methods:

• Saliva samples from 66 children were cultured on Blood agar and Mitis Salivarius Bacitracin agar.
• Biochemical tests and the double layer in agar technique were used to identify and assess the antagonistic potential of S. mutans strains.
• Incubation was performed at 37°C in an anaerobic atmosphere for 48 hours.

Main Results:

• Streptococcus mutans was detected in 91.7% of children without caries and 96.7% of children with caries.
• A significant number of S. mutans strains from both groups demonstrated varying degrees of antagonistic action against S. mutans.
• 112 S. mutans strains with high antagonistic potential were identified.

Conclusions:

• The study successfully identified numerous S. mutans strains with significant antagonistic properties.
• These identified strains hold promise for the development of innovative probiotics or therapeutic agents for dental caries prevention and control.
• Further research is warranted to validate the efficacy and safety of these strains for clinical application.