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Penicillin-induced lysis of Streptococcus mutans
Infection and Immunity
|November 1, 1984
Summary
Penicillin G causes significant lysis in Streptococcus mutans and other oral streptococci. This bacterial cell lysis depends on factors like cell density and pH.
Area of Science:
- Microbiology
- Bacteriology
- Oral Health
Background:
- Streptococcus mutans is a key pathogen in dental caries.
- Understanding bacterial susceptibility to antibiotics is crucial for effective treatment.
Purpose of the Study:
- To investigate the effect of penicillin G on Streptococcus mutans and related oral streptococci.
- To determine the conditions influencing penicillin-induced bacterial lysis.
Main Methods:
- Treatment of Streptococcus mutans GS-5 cells with varying concentrations of penicillin G.
- Observation of lysis under different cell densities and pH conditions.
- Testing other oral streptococci species for penicillin-induced lysis.
Main Results:
- Penicillin G induced substantial lysis in Streptococcus mutans GS-5 within a narrow concentration range.
- Lysis was dependent on cell density and the pH of the lysis medium.
- Streptococcus sobrinus, Streptococcus rattus, and Streptococcus cricetus also showed significant lysis, while Streptococcus ferus exhibited lesser degrees.
Conclusions:
- Penicillin G is effective in causing lysis of Streptococcus mutans and other oral streptococci.
- Cell density and pH are critical factors modulating penicillin-induced lysis in these bacteria.
- These findings have implications for understanding antibiotic efficacy in oral environments.
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