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Updated: Jul 15, 2026
12:41
Stress-induced Antibiotic Susceptibility Testing on a Chip
Published on: January 8, 2014
Antibiotic stress induces genetic transformability in the human pathogen Streptococcus pneumoniae
Marc Prudhomme1, Laetitia Attaiech, Guillaume Sanchez
1Laboratoire de Microbiologie et Génétique Moléculaires, UMR 5100 CNRS-Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex 9, France.
Science (New York, N.Y.)
|July 11, 2006
Summary
Antibiotic stress can trigger genetic transformation in Streptococcus pneumoniae, a key human pathogen. This finding highlights the need to consider bacterial adaptation when designing antibiotic therapies.
Area of Science:
- Microbiology
- Genetics
- Molecular Biology
Background:
- Natural transformation is a significant pathway for genetic exchange in bacteria.
- Streptococcus pneumoniae is a major human pathogen with implications for public health.
Purpose of the Study:
- To investigate the impact of antibiotic stress on genetic transformation in Streptococcus pneumoniae.
- To determine the role of the competence regulatory cascade and recA in antibiotic-induced transformation.
Main Methods:
- Exposure of Streptococcus pneumoniae to aminoglycoside and fluoroquinolone antibiotics, and mitomycin C.
- Analysis of the competence regulatory cascade and recA induction.
- Assessment of genetic transformation rates under stress conditions.
Main Results:
- Aminoglycoside, fluoroquinolone antibiotics, and mitomycin C induced genetic transformation in S. pneumoniae.
- This induction was dependent on an intact competence regulatory cascade.
- Mitomycin C-induced recA expression was contingent on competence development, and S. pneumoniae lacks an SOS-like system.
Conclusions:
- Antibiotic stress can enhance genetic exchange in Streptococcus pneumoniae via natural transformation.
- The findings suggest that bacterial adaptation mechanisms should be considered in antibiotic therapy design.
- Understanding induced transformation is crucial for managing antibiotic resistance in this pathogen.
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