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In-vitro study of bacterial adherence to different types of intraocular lenses
Carole Burillon1, Laurent Kodjikian, Gérard Pellon
1Laboratoire de Microbiologie, Pavillon Netien, Institut des Sciences Pharmaceutiques et Biologiques, Lyon, France.
Abstract:
The aim of this study was to determine the adherence of Staphylococcus epidermidis to intraocular lenses made of five different biomaterials: polymethylmethacrylate (PMMA), heparinized PMMA, silicone, hydrophilic acrylic, and hydrogel. The extent of bacterial binding was measured by counting. The results were compared using a one-factor variance analysis. Adherence was weakest on hydrogel and strongest on the silicone polymer. Bacterial adherence to the implant surface must therefore depend on the hydrophobicity or hydrophilicity of the biomaterial.
Insights
Bacterial adherence to intraocular lenses (IOLs) varied by biomaterial. Hydrogel IOLs showed the weakest Staphylococcus epidermidis adherence, while silicone IOLs exhibited the strongest, suggesting surface properties influence bacterial binding.
Area of Science:
- Ophthalmology and Biomedical Engineering
- Microbiology and Biomaterials Science
Background:
- Staphylococcus epidermidis is a common cause of opportunistic infections following intraocular lens (IOL) implantation.
- The choice of biomaterial for IOLs may influence the risk of bacterial adherence and subsequent infection.
- Understanding bacterial-biomaterial interactions is crucial for developing infection-resistant IOLs.
Purpose of the Study:
- To quantify and compare the adherence of Staphylococcus epidermidis to five distinct IOL biomaterials.
- To investigate the relationship between biomaterial properties (hydrophobicity/hydrophilicity) and bacterial adhesion.
Main Methods:
- Bacterial adherence assays were performed on IOLs fabricated from polymethylmethacrylate (PMMA), heparinized PMMA, silicone, hydrophilic acrylic, and hydrogel.
- Bacterial binding was quantified by direct counting.
- Statistical analysis was conducted using one-factor variance analysis to compare adherence levels.
Main Results:
- Significant differences in Staphylococcus epidermidis adherence were observed across the tested biomaterials.
- The weakest bacterial adherence was recorded on hydrogel IOLs.
- The strongest bacterial adherence was observed on silicone polymer IOLs.
Conclusions:
- The hydrophilicity or hydrophobicity of the intraocular lens biomaterial is a critical factor determining Staphylococcus epidermidis adherence.
- Hydrogel materials demonstrate superior resistance to bacterial adhesion compared to silicone and PMMA-based IOLs.
- Material selection for IOLs can play a role in mitigating the risk of ocular infections.