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The superbugs: evolution, dissemination and fitness.
A Morris1, J D Kellner, D E Low
1Department of Microbiology, Mount Sinai Hospital, 600 University Avenue, Rm 1487, Toronto, Ontario M5G 1X5, Canada.
Current Opinion in Microbiology
|March 6, 1999
Summary
Bacteria are evolving resistance to antibiotics and spreading these traits efficiently. Recent research shows bacteria can adapt to antibiotic resistance with minimal fitness cost, complicating control of superbugs.
Area of Science:
- Microbiology
- Evolutionary Biology
- Genetics
Background:
- Antibiotics have driven the evolution of bacterial resistance mechanisms.
- Bacteria possess sophisticated strategies for disseminating resistance genes.
- The spread of antibiotic resistance poses a significant global health threat.
Purpose of the Study:
- To elucidate the mechanisms by which bacteria evolve antibiotic resistance.
- To understand the processes driving the dissemination of antibiotic resistance genes.
- To investigate bacterial adaptation to the fitness costs associated with resistance.
Main Methods:
- Review of recent scientific literature on antibiotic resistance evolution.
- Analysis of genetic and molecular mechanisms of resistance development.
- Examination of bacterial fitness and adaptation studies.
Main Results:
- Bacteria have evolved diverse and effective resistance mechanisms.
- Efficient gene transfer facilitates rapid spread of antibiotic resistance.
- Some bacteria adapt to resistance with negligible fitness penalties, enhancing survival.
- These adaptations complicate efforts to control resistant bacterial infections.
Conclusions:
- Bacterial evolution of antibiotic resistance is a complex, multi-faceted process.
- Understanding adaptation mechanisms is crucial for developing new control strategies.
- The minimal fitness cost of resistance presents a major challenge in combating superbugs.