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Published on: August 30, 2018
The prevention of antibiotic resistance during treatment
1Bartholomews and Royal London School of Medicine, UK.
Abstract:
Prevention of emergence of antibiotic resistance during treatment is an important goal when prescribing antimicrobials. Antibiotic resistant bacteria can emerge in three main ways--by acquisition of new genes via transposons or horizontal gene transfer, by selection of resistant variants and by selection of naturally resistant strains. In order to minimize emergence of antibiotic resistance during therapy it is important to try and avoid antibiotics which encourage the transfer of resistance genes, to avoid selection of resistant variants from susceptible pathogens and to avoid ablation of antibiotic susceptible normal flora. However, implementing these objectives is not always easy. This paper discusses possible ways of limiting the emergence of resistant bacteria during treatment. It does not consider how to prevent the spread of these strains from person to person. The prevalence of antibiotic-resistant bacteria depends upon the selection of antibiotic-resistant strains and spread of these strains from person to person. Prevention therefore consists of two parts--the prevention of acquisition of resistance/selection of antibiotic-resistant variants and interrupting the mechanisms by which person-to-person spread can occur. This paper considers only the first of these two influences on prevalence of resistance.
Insights
Preventing antibiotic resistance during treatment is crucial. Strategies include avoiding antibiotics that promote gene transfer, minimizing selection of resistant variants, and preserving susceptible normal flora to limit antimicrobial resistance.
Area of Science:
- Microbiology
- Infectious Diseases
- Pharmacology
Background:
- Antibiotic resistance is a growing global health threat.
- Emergence of resistant bacteria during treatment complicates antimicrobial therapy.
- Understanding resistance mechanisms is key to prevention.
Purpose of the Study:
- To discuss strategies for limiting the emergence of antibiotic-resistant bacteria during antimicrobial treatment.
- To focus on preventing resistance acquisition and selection, not person-to-person spread.
- To provide insights for optimizing antimicrobial prescribing practices.
Main Methods:
- Review of mechanisms of antibiotic resistance emergence.
- Discussion of therapeutic approaches to minimize resistance development.
- Analysis of factors influencing selection of resistant bacterial strains.
Main Results:
- Antibiotic resistance emerges via gene acquisition, selection of resistant variants, or selection of naturally resistant strains.
- Minimizing resistance requires avoiding antibiotics that facilitate gene transfer and preserving susceptible normal flora.
- Strategies focus on preventing resistance acquisition and selection during therapy.
Conclusions:
- Limiting the emergence of antibiotic resistance during treatment is achievable through careful antimicrobial selection and administration.
- Preserving susceptible normal flora and avoiding selection of resistant variants are critical components of antimicrobial stewardship.
- Further research and clinical implementation of these strategies are needed to combat antimicrobial resistance.
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