In vitro activity of carvacrol against staphylococcal preformed biofilm by liquid and vapour contact.
Carvacrol is an important component of essential oils and recently has attracted much attention as a result of its biological properties, such as a wide spectrum of antimicrobial activity. The aim of this study was to evaluate the effect of carvacrol in liquid and vapour phase on preformed biofilms of Staphylococcus aureus and Staphylococcus epidermidis by determining biofilm biomass and cultivable cell numbers, and by using epifluorescence and scanning electron microscopy. Carvacrol was able to reduce biofilm biomass and cell viability more effectively when used with liquid contact rather than with vapour phase. The efficacy of treatment with carvacrol vapour was found to be dependent on exposure time. The predominance of red fluorescence using a LIVE/DEAD BacLight Viability kit (Molecular Probes) and the partially destroyed biofilm architecture as determined by microscopy in treated samples provided evidence for the efficacy of carvacrol. The findings of this investigation suggest a potential application for carvacrol in the inactivation of staphylococcal biofilms.
Pharmaco-Biological Department, University of Messina, Messina, Italy.
Antonia
A
Nostro
Pharmaco-Biological Department, University of Messina, Messina, Italy.
Andreana
A
Marino
SIFI Pharma SpA, Catania, Italy.
Anna Rita
AR
Blanco
Department of Biomedical Sciences, School of Pharmacy, University 'G. d'Annunzio', Chieti, Italy.
Luigina
L
Cellini
Department of Biomedical Sciences, School of Pharmacy, University 'G. d'Annunzio', Chieti, Italy.
Mara
M
Di Giulio
Pharmaco-Biological Department, University of Messina, Messina, Italy.
Francesco
F
Pizzimenti
SIFI Pharma SpA, Catania, Italy.
Andrea Sudano
AS
Roccaro
Pharmaco-Biological Department, University of Messina, Messina, Italy.
Giuseppe
G
Bisignano
D018441:Biofilms / Q000187:drug effects*; D018533:Biomass; D015169:Colony Count, Microbial; D003470:Culture Media; D000081007:Cymenes; D006801:Humans; D008826:Microbial Sensitivity Tests / Q000379:methods; D008855:Microscopy, Electron, Scanning; D008856:Microscopy, Fluorescence; D039821:Monoterpenes / Q000737:chemistry / Q000494:pharmacology*; D009822:Oils, Volatile / Q000737:chemistry / Q000494:pharmacology*; D013211:Staphylococcus aureus / Q000187:drug effects*; D013212:Staphylococcus epidermidis / Q000187:drug effects*; D014835:Volatilization
D003470:Culture Media; D000081007:Cymenes; D039821:Monoterpenes; D009822:Oils, Volatile; C073316:carvacrol