Beta-lactam/aminoglycoside combinations: interactions and their mechanisms

Area of Science:

• Microbiology
• Pharmacology
• Infectious Diseases

Background:

• Beta-lactam and aminoglycoside antibiotics are frequently combined for treating bacterial infections.
• Theoretical advantages support the use of these combined antibiotic therapies.
• These combinations generally exhibit synergistic or indifferent effects, with antagonism being rare.

Purpose of the Study:

• To review the mechanisms of synergism, resistance to synergism, and antagonism in antibiotic combinations.
• To highlight the extensive research in enterococci regarding these mechanisms.
• To identify the need for further studies in other organisms.

Main Methods:

• Literature review of studies on beta-lactam and aminoglycoside combinations.
• Analysis of experimental data on antimicrobial interactions.
• Focus on mechanisms of synergy, resistance, and antagonism.

Main Results:

• Combinations of beta-lactams and aminoglycosides usually result in synergism or indifference.
• Antagonism between these antibiotic classes is observed very rarely.
• Mechanisms have been extensively studied in enterococci.

Conclusions:

• Beta-lactam and aminoglycoside combinations are generally effective and safe.
• Understanding the mechanisms of interaction is crucial for optimizing therapy.
• Further research is required to elucidate these mechanisms in a broader range of microorganisms.