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Potential Antimicrobial Activity of Red and White Wine Phenolic Extracts against Strains of Staphylococcus aureus, Escherichia coli and Candida albicans

Chrissanthy Papadopoulou1, Kalliopi Soulti2 and Ioannis G. Roussis2*


1
Food Microbiology Unit, Laboratory of Microbiology, Medical School, University of Ioannina, GR-45110 Ioannina, Greece

2Laboratory of Food Chemistry, Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece

Article history:

Received June 15, 2004
Accepted November 22, 2004

Key words:

wine, phenolics, antimicrobial, pathogens

Summary:

The aim of this study was to assess antimicrobial activities of wine phenolic extracts. The potential antimicrobial activity of alcohol-free red and white wine extracts against pathogenic strains of Staphylococcus aureus, Escherichia coli and Candida albicans was studied using the agar well diffusion method. Total phenolic content of wine extracts was determined by the Folin-Ciocalteu method, while their phenolic composition was specified by high performance liquid chromatography and diode array detector (HPLC-DAD). The antimicrobial activity of the tested extracts was related to their total phenolic content. Antimicrobial activity of the tested wine extracts was more effective against S. aureus and less effective against E. coli and C. albicans. Also, C. albicans was resistant to more wine extracts than the two bacterial species studied. The antimicrobial activity and the phenolic composition of the tested white and red wine extracts indicate that some phenolic acids have the potential to inhibit growth of certain pathogens such as S. aureus, E. coli and C. albicans strains.



*Corresponding author:    groussis@cc.uoi.gr

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