There is limited evidence indicating
that drug-eluting dressings
are clinically more effective than simple conventional dressings.
To shed light on this concern, we have performed evidence-based research
to evaluate the antimicrobial action of thymol (THY)-loaded antimicrobial
dressings having antibiofilm forming ability, able to eradicate intracellular
and extracellular pathogenic bacteria. We have used four different Staphylococcus aureus strains, including the ATCC
25923 strain, the Newman strain (methicillin-sensitive strain, MSSA)
expressing the coral green fluorescent protein from the vector pCN47,
and two clinical reference strains, Newman-(MSSA) and USA300-(methicillin-resistant
strain), as traceable models of pathogenic bacteria commonly infecting
skin and soft tissues. Compared to non-loaded dressings, THY-loaded
polycaprolactone-based electrospun dressings were also able to eliminate
pathogenic bacteria in coculture models based on infected murine macrophages.
In addition, by using confocal microscopy and the conventional microdilution
plating method, we corroborated the successful ability of THY in preventing
also biofilm formation. Herein, we demonstrated that the use of wound
dressings loaded with the natural monoterpenoid phenol derivative
THY are able to eliminate biofilm formation and intracellular methicillin-sensitive S aureus more efficiently than with their corresponding
THY-free counterparts.
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