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Antimicrobial activity of a novel catheter lock solution
Chirag B Shah1, Marc W Mittelman, J W Costerton
1Biolink Corporation, Norwell, Massachusetts, USA.
Antimicrobial Agents and Chemotherapy
|May 23, 2002
Summary
A new taurolidine-citrate catheter lock solution effectively reduced microbial counts and eradicated biofilms, showing promise for preventing and treating intravascular catheter infections.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Biomaterials Science
Background:
- Intravascular catheter-associated bloodstream infections (iCBSI) are a significant cause of morbidity and increased healthcare costs.
- Microbial colonization and biofilm formation on catheters are difficult to treat with antibiotics and often lead to device failure.
- Effective strategies are needed to prevent and manage catheter-related infections.
Purpose of the Study:
- To evaluate the antimicrobial and anti-biofilm activity of a novel taurolidine-citrate catheter lock solution.
- To assess its efficacy against common bloodstream pathogens, including bacteria and fungi.
- To compare its performance against standard heparin lock solutions in a catheter model.
Main Methods:
- In vitro testing of planktonic microbial reduction after exposure to taurolidine-citrate solution.
- Assessment of antimicrobial activity in a catheter model by locking with taurolidine-citrate or heparin.
- Evaluation of biofilm eradication efficacy on silicone disks using a modified Robbins device.
Main Results:
- Taurolidine-citrate solution demonstrated rapid and significant reduction (>99%) of Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, and Enterococcus faecalis.
- A higher concentration of taurolidine-citrate was cidal against Candida albicans.
- Catheters locked with taurolidine-citrate showed no microbial growth after 72 hours, while heparin-locked catheters exhibited substantial growth.
- Taurolidine-citrate significantly reduced pre-formed biofilms compared to heparin (median 4.8 log vs. 1.7 log reduction).
Conclusions:
- Taurolidine-citrate exhibits potent activity against planktonic microbes and effectively eradicates established biofilms.
- This solution demonstrates superior performance compared to heparin in preventing microbial proliferation within catheters.
- Taurolidine-citrate represents a promising agent for the prevention and treatment of intravascular catheter-related infections.