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Effect of antibiotic pretreatment on resistance
Franco Paradisi1, Giampaolo Corti, Serena Sbaragli
1Infectious Disease Unit, University of Florence School of Medicine, Florence, Italy.
Abstract:
The emergence of bacterial resistance to antibiotics limits the efficacy of technical developments in the field of infectious diseases. This is particularly true for respiratory tract infections, which are by far the main reason for antibiotic use in developed countries. Antimicrobial resistance among respiratory pathogens involves both gram-positive (primarily Streptococcus pneumoniae) and gram-negative (Haemophilus influenzae, Moraxella catarrhalis, and the more rare enterobacteriaceae) microorganisms. A number of epidemiologic studies show a relationship between antibiotic use and antibiotic resistance, and how antibiotic pretreatment can reduce the range of effective drugs for optimal therapy of infections in general and of respiratory tract infections in particular. An appropriate use of antimicrobials is of crucial importance to limit the emergence and spread of bacterial resistance to antibiotics. This can be achieved by avoiding usage in nonspecific, probably viral, infections that are unlikely to be influenced by antibiotic therapy, and by using narrow-spectrum drugs to minimize selective pressure.
Insights
Antibiotic resistance in respiratory infections is rising, driven by overuse. Prudent antimicrobial use, including avoiding unnecessary prescriptions and choosing narrow-spectrum drugs, is crucial to preserve antibiotic effectiveness.
Area of Science:
- Infectious Diseases
- Microbiology
- Pharmacology
Background:
- Bacterial resistance to antibiotics is a growing global health concern, diminishing the effectiveness of treatments for infectious diseases.
- Respiratory tract infections are a primary driver of antibiotic consumption in developed nations, making them a critical area for antimicrobial stewardship.
- Key respiratory pathogens exhibiting antimicrobial resistance include gram-positive (e.g., Streptococcus pneumoniae) and gram-negative bacteria (e.g., Haemophilus influenzae, Moraxella catarrhalis).
Purpose of the Study:
- To highlight the critical link between antibiotic use and the emergence of antimicrobial resistance.
- To emphasize the importance of appropriate antimicrobial prescribing practices in managing respiratory tract infections.
- To underscore the need for strategies that limit the development and spread of antibiotic resistance.
Main Methods:
- Review of epidemiologic studies examining the relationship between antibiotic consumption and resistance patterns.
- Analysis of the impact of antibiotic pretreatment on subsequent infection therapy.
- Evaluation of antimicrobial use in the context of common respiratory pathogens.
Main Results:
- Epidemiologic data confirm a strong correlation between antibiotic usage and the prevalence of antibiotic resistance.
- Prior antibiotic exposure can restrict the range of effective therapeutic options for current infections.
- Inappropriate antibiotic use, particularly for likely viral infections, contributes significantly to resistance.
Conclusions:
- Appropriate antimicrobial use is paramount to mitigate the rise and dissemination of antibiotic resistance.
- Strategies such as avoiding antibiotics for non-specific infections and employing narrow-spectrum agents are essential.
- Effective antimicrobial stewardship is vital for preserving the efficacy of antibiotics in treating bacterial infections, especially respiratory ones.