Related Experiment Videos
Prevalence of transformable Streptococcus mutans in human dental plaque
Infection and Immunity
|September 1, 1983
Summary
Genetic transformation to streptomycin resistance was studied in Streptococcus mutans. Serotype c/e/f strains showed transformability, while serotype d/g strains did not, indicating serotype-specific genetic capabilities in this oral bacterium.
Area of Science:
- Microbiology
- Genetics
- Oral Health
Background:
- Streptococcus mutans is a primary agent of dental caries.
- Understanding genetic transformation in S. mutans is crucial for developing novel therapeutic strategies.
- Serotype variation within S. mutans may influence its genetic behavior.
Purpose of the Study:
- To investigate the transformability of Streptococcus mutans serotypes c/e/f and d/g to streptomycin resistance.
- To determine if genetic exchange occurs between different oral streptococcal species.
Main Methods:
- Screening of 100 freshly isolated S. mutans strains (serotypes c/e/f and d/g) for genetic transformation.
- Utilizing donor DNA from streptomycin-resistant S. mutans strains.
- Testing transformability with DNA from various oral streptococcal species.
Main Results:
- 28% of serotype c/e/f S. mutans strains were transformable to streptomycin resistance.
- No transformability was observed in serotype d/g S. mutans strains.
- Two transformable serotype c/e/f strains successfully integrated DNA from other oral streptococci.
Conclusions:
- Serotype c/e/f strains of S. mutans exhibit a higher capacity for genetic transformation compared to serotype d/g strains.
- Genetic exchange between S. mutans and other oral streptococci is feasible, highlighting potential for horizontal gene transfer in the oral microbiome.