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[Detection of Pseudomonas aeruginosa biofilm on medical biomaterials]
Abstract:
The adhesion and biofilm formation of Pseudomonas aeruginosa strains on the surface of catheters made of various polymers (PU, SL, PCW) were determined in vitro. It was used the method by Richards et al. with modification of Rózalska et al. (1998), in which soluble colourless TTC is reduced to insoluble red formazan. The results of this study indicate that 80.3% of this strains adhered and 94.6% formed biofilm on the Nelaton catheter, 86% strains adhered and 76.1% formed biofilm on the polyurethane catheter, and 73.2% strains adhered, and 78.9% formed biofilm on the Foley catheter.
Insights
Pseudomonas aeruginosa readily adheres to and forms biofilms on various catheter materials. The Nelaton catheter showed the highest rates of bacterial adhesion and biofilm formation in vitro.
Area of Science:
- Microbiology
- Biomaterials Science
- Medical Device Research
Background:
- Catheter-associated infections are a significant clinical concern.
- Pseudomonas aeruginosa is a common opportunistic pathogen.
- Bacterial adhesion and biofilm formation on medical devices contribute to persistent infections.
Purpose of the Study:
- To investigate the in vitro adhesion and biofilm formation of Pseudomonas aeruginosa strains on different catheter materials.
- To compare the susceptibility of various polymer surfaces to bacterial colonization.
Main Methods:
- In vitro assessment of bacterial adhesion and biofilm formation.
- Utilized a modified Richards et al. method with TTC reduction to quantify bacterial presence.
- Tested catheter materials including polyurethane (PU), silicone (SL), and polyvinyl chloride (PCW) - represented by Nelaton, polyurethane, and Foley catheters respectively.
Main Results:
- High percentages of Pseudomonas aeruginosa strains adhered to and formed biofilms on all tested catheter types.
- The Nelaton catheter exhibited the highest bacterial adhesion (80.3%) and biofilm formation (94.6%).
- Polyurethane catheters showed 86% adhesion and 76.1% biofilm formation, while Foley catheters had 73.2% adhesion and 78.9% biofilm formation.
Conclusions:
- Pseudomonas aeruginosa demonstrates a significant capacity for adhesion and biofilm formation on common catheter materials.
- Catheter material composition influences the extent of bacterial colonization.
- The Nelaton catheter surface appears particularly prone to Pseudomonas aeruginosa biofilm development.
