Mechanisms of resistance to antimicrobial drugs in pathogenic Gram-positive cocci

Area of Science:

• Microbiology
• Infectious Diseases
• Pharmacology

Background:

• Pathogenic Gram-positive cocci, including staphylococci, streptococci, and enterococci, pose significant health risks.
• Extensive antibiotic use has driven the emergence and dissemination of antimicrobial resistance (AMR).
• Resistance to antimicrobials, particularly non-beta-lactam and non-glycopeptide agents, is a critical challenge in treating infections caused by these pathogens.

Purpose of the Study:

• To review the occurrence, mechanisms, and genetic basis of antimicrobial resistance in pathogenic staphylococci, streptococci, and enterococci.
• To discuss established and novel antimicrobial agents used against these resistant Gram-positive cocci.

Main Methods:

• Literature review of scientific publications on antimicrobial resistance in Gram-positive cocci.
• Analysis of resistance mechanisms, genetic determinants, and clinical implications.
• Consideration of a broad spectrum of antimicrobial agents, including older and newer drugs.

Main Results:

• Widespread antibiotic usage is the primary driver of resistance.
• Specific resistance mechanisms and genetic elements contribute to reduced susceptibility.
• Both established (e.g., macrolides, quinolones) and new agents (e.g., linezolid, daptomycin) are evaluated for their efficacy against resistant strains.

Conclusions:

• Understanding resistance patterns is crucial for effective treatment strategies.
• Continuous monitoring and development of new antimicrobial therapies are necessary to combat rising resistance.
• Pathogenic Gram-positive cocci require ongoing research to manage and treat infections effectively.