Biofilms on central venous catheters: is eradication possible?

Area of Science:

• Medical Microbiology
• Biomaterials Science
• Infectious Diseases

Background:

• Biofilms on indwelling medical devices, like central venous catheters, cause significant patient morbidity and mortality.
• Catheter-associated bloodstream infections are difficult to treat with systemic antibiotics due to biofilm tolerance.

Purpose of the Study:

• To review the effectiveness of antimicrobial lock treatment (ALT) for biofilm eradication on medical devices.
• To identify factors influencing ALT efficacy and explore novel treatment strategies.

Main Methods:

• Review of human, animal, and in vitro studies on ALT for biofilm infections.
• Analysis of antimicrobial agent properties and biofilm characteristics affecting treatment outcomes.

Main Results:

• ALT efficacy depends on organism type, biofilm age, antimicrobial agent, and treatment duration.
• Agents with rapid bactericidal effects and less susceptibility to biofilm matrix are more effective.
• Fungal biofilms are challenging to treat with ALT; newer agents like echinocandins show potential.

Conclusions:

• Antimicrobial lock treatment is a viable strategy for biofilm eradication, but challenges like resistance and fungal infections persist.
• Novel agents and technologies (ultrasound, bacteriophages, quorum-sensing inhibitors, enzymes) show promise for future biofilm management.