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Effect of plastic catheter material on bacterial adherence and viability
G Lopez-Lopez1, A Pascual, E J Perea
1Department of Microbiology, School of Medicine, University of Seville, Spain.
Journal of Medical Microbiology
|June 1, 1991
Summary
Bacterial adherence to catheters varies by material. Polyvinyl chloride (PVC) and siliconised latex showed higher adherence for Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli, while eluates from some catheters promoted bacterial growth.
Area of Science:
- Biomaterials Science
- Microbiology
- Infectious Diseases
Background:
- Catheter-associated infections are a significant clinical concern.
- Understanding bacterial adherence to different catheter materials is crucial for infection prevention.
Purpose of the Study:
- To evaluate the adherence kinetics of common bacterial pathogens to various catheter biomaterials.
- To assess the impact of catheter eluates on bacterial viability and growth.
Main Methods:
- Radiometric assay used to quantify adherence of Staphylococcus aureus, S. epidermidis, Pseudomonas aeruginosa, and Escherichia coli.
- Bacteria incubated with catheter segments (PVC, Teflon, siliconised latex, polyurethane, Vialon) for up to 3 days.
- Bacterial viability and growth assessed in catheter eluates.
Main Results:
- Peak bacterial adherence occurred at 24h for P. aeruginosa and 72h for other strains.
- Polyvinyl chloride (PVC) and siliconised latex exhibited significantly higher bacterial adherence (2-6 times) for all tested strains.
- Catheter eluates generally increased E. coli and P. aeruginosa growth, except for siliconised latex which reduced E. coli to undetectable levels.
Conclusions:
- Bacterial adherence to catheters is influenced by the biomaterial's properties.
- Substances eluting from catheters can modulate the viability and growth of microorganisms, with varied effects depending on the bacterium and material.