Diversity among multidrug-resistant enterococci

Area of Science:

• Microbiology
• Infectious Diseases
• Antimicrobial Resistance

Background:

• Enterococci are significant pathogens in both community- and hospital-acquired infections.
• Despite not typically causing severe systemic inflammation, enterococci exhibit extensive resistance to numerous antimicrobial agents.
• This resistance profile complicates treatment strategies for enterococcal infections.

Purpose of the Study:

• To highlight the challenges posed by enterococcal antimicrobial resistance.
• To explore the mechanisms underlying enterococcal resistance acquisition and spread.
• To underscore the ongoing threat of multidrug-resistant enterococci.

Main Methods:

• Literature review and synthesis of existing data on enterococcal resistance.
• Analysis of genetic mechanisms of resistance transfer (conjugation, transposons, plasmids).
• Evaluation of enterococcal hardiness and environmental survival.

Main Results:

• Enterococci demonstrate resistance to cell-wall active agents, aminoglycosides, penicillins, ampicillin, and vancomycin.
• Co-resistance to multiple drugs is common, particularly with vancomycin resistance.
• Enterococci readily acquire resistance genes via conjugation, facilitated by plasmids and transposons.

Conclusions:

• Enterococcal antimicrobial resistance, driven by gene acquisition and transfer, presents a significant therapeutic challenge.
• Bacterial hardiness contributes to the environmental persistence and spread of multidrug-resistant enterococcal clones.
• Enterococci will continue to be a formidable challenge in clinical settings due to their resistance.