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Antimicrobial Characterization of Advanced Materials for Bioengineering Applications
Published on: August 4, 2018
Antimicrobial PLGA ultrafine fibers: interaction with wound bacteria
Somiraa S Said1, Affaf K Aloufy, Omar M El-Halfawy
1Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt.
Summary
Polymer nanofibers in wound dressings interact dynamically with bacteria, enhancing drug release and bacterial eradication. This highlights the need for properly medicated dressings to prevent reinfection and resistance.
Area of Science:
- Biomaterials Science
- Microbiology
- Drug Delivery Systems
Background:
- Polymer nanofibers are widely studied for wound dressings.
- Their dynamic interaction with the wound environment, especially bacteria, remains unexplored.
- Understanding these interactions is crucial for effective wound healing.
Purpose of the Study:
- To investigate the dynamic interaction between antimicrobial-loaded polymer ultrafine fibers (UFs) and wound bacteria.
- To characterize the impact of bacterial colonization on drug release and fiber morphology.
- To establish material-function relationships for biomedical applications under biorelevant conditions.
Main Methods:
- Development and characterization of fusidic acid (FA)-loaded poly(lactic-co-glycolic acid) (PLGA) UFs.
- In vitro microbiological studies using three wound bacterial strains.
- Assessment of bacterial colonization, biofilm formation, drug release kinetics, UF morphology, and pH changes.
Main Results:
- Rapid bacterial colonization and dense biofilm formation on UFs were observed.
- Bacterial stacks significantly enhanced drug release, causing detrimental UF morphological changes and decreased medium pH.
- FA-loaded UFs effectively eradicated planktonic bacteria and suppressed biofilm formation.
Conclusions:
- Non-medicated or inadequately medicated fibrous wound dressings pose a risk of wound reinfection and microbial resistance.
- Characterizing drug delivery systems under biorelevant conditions is essential for establishing reliable material-function relationships in biomedical applications.
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