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The effect of ramoplanin coating on colonization by Staphylococcus aureus of catheter segments implanted
G Romanò1, M Berti, B P Goldstein
1Lepetit Research Center, Gruppo Lepetit S.p.A., Gerenzano (Varese), Italy.
Abstract:
We investigated the effect of ramoplanin coating on Staphylococcus aureus colonization of catheter segments in mice. Segments (1 cm in length) were inserted subcutaneously, 10(7) cfu of S. aureus were inoculated nearby at different times and segments were removed 24 or 48 h later. Uncoated segments were colonized with 10(4) to >10(5) cfu, whereas ramoplanin-coated segments had mean counts of <10 to approximately 100 cfu. Ramoplanin coating may prevent colonization of catheters during the first few days after insertion.
Insights
Ramoplanin coating significantly reduced Staphylococcus aureus colonization on catheter segments in mice. This antibiotic coating shows promise for preventing early-stage catheter-related infections.
Area of Science:
- Microbiology
- Infectious Diseases
- Biomedical Engineering
Background:
- Catheter-associated infections are a significant clinical challenge.
- Staphylococcus aureus is a common pathogen responsible for these infections.
- Novel strategies are needed to prevent bacterial colonization on medical devices.
Purpose of the Study:
- To evaluate the efficacy of ramoplanin coating in preventing Staphylococcus aureus colonization on implanted catheter segments in a murine model.
Main Methods:
- Catheter segments were implanted subcutaneously in mice.
- Staphylococcus aureus was inoculated near the segments.
- Segments were retrieved after 24 or 48 hours for bacterial enumeration.
Main Results:
- Uncoated catheter segments showed high levels of S. aureus colonization (10^4 to >10^5 cfu).
- Ramoplanin-coated segments exhibited significantly lower colonization (mean counts <10 to approximately 100 cfu).
Conclusions:
- Ramoplanin coating effectively inhibits Staphylococcus aureus colonization on catheter segments.
- This approach may prevent early-onset catheter colonization and subsequent infections.