Resistance to last-resort antibiotics in enterococci.

Area of Science:

• Microbiology and Infectious Diseases
• Molecular Biology
• Pharmacology

Background:

• Enterococci, particularly E. faecalis and E. faecium, are significant opportunistic pathogens in healthcare settings.
• Antibiotic resistance in enterococci poses a major public health threat, complicating treatment of infections like UTIs, bloodstream infections, and endocarditis.

Purpose of the Study:

• To comprehensively review the mechanisms of antibiotic resistance in enterococci.
• To examine resistance to last-line antibiotics including vancomycin, teicoplanin, linezolid, and daptomycin.
• To evaluate novel antibiotic candidates and alternative therapies for multidrug-resistant enterococcal infections.

Main Methods:

• Literature review focusing on antibiotic resistance mechanisms in Enterococcus species.
• Analysis of resistance acquisition via chromosomal mutations and horizontal gene transfer.
• Evaluation of current antibiotic development pipelines and alternative therapeutic strategies.

Main Results:

• Enterococci exhibit diverse resistance mechanisms, readily acquiring resistance to last-line antibiotics.
• Horizontal gene transfer is a key driver of multidrug resistance in enterococci.
• Emerging resistance necessitates continuous research into new treatment options.

Conclusions:

• Understanding enterococcal antibiotic resistance is crucial for effective treatment strategies.
• Novel antibiotics and alternative therapies like phage therapy are vital for combating multidrug-resistant enterococci.
• Ongoing research is essential to stay ahead of enterococci's adaptive resistance mechanisms.