Sygizium
Numerous studies have demonstrated the potent antibacterial effects of cloves6,78. The bacterial growth inhibitory activity is due to the presence of numerous constituents, including eugenol, eugenyl acetate, β-caryophyllene, 2-heptanone, acetyl-eugenol, α-humulene, methyl salicylate, iso-eugenol, methyl-eugenol, phenyl propanoids, kaempferol, rhamnetin, myricetin, gallic acid, ellagic acid, and oleanolic acid. These compounds can denature proteins and react with phospholipids in the cell membrane, changing its permeability. Burst and Reinders 2003, reported the efficacy of the oil against nontoxigenic strains of E. coli. Other studies have reported the antifungal activity of clove oil against yeasts and filamentous fungi, such as several foodborne fungal species10,11 and human pathogens. In animal cases the essential oil and eugenol showed antifungal activity against Candida, Aspergillus, and dermatophytes. The mechanism of action is related to bacterial membrane lesions10. 14,15,16
Origanum
Oregano has been used for thousands of years as a spice and condiment and in ethnomedicine for its antifungal, antimicrobial, insecticidal and antioxidant properties. There were also reported antispasmodic and analgesic effects and usefulness in gastrointestinal disorders18. Silva et al. 19 reported the inhibitory effect on the release of inflammatory mediators of carvacrol present in oregano essential oil. In addition to the essential oil, oregano contains a rich fraction of polyphenols with antioxidant and anti-inflammatory actions20,21.
Grapefruit
Numerous scientific studies report the antiseptic and antibacterial properties of Citrus paradisi22. The ethanolic extract has been tested on 20 bacterial and 10 yeast strains23 including the pathogenic microorganisms S. aureus, E. coli, K. pneumoniae, B. subtilis, M. luteus and Candida albicans. The tested extracts showed good antimicrobial activity against all clinical isolates compared to the control. In other studies the same extract, later used in Acand, showed a remarkable inhibitory action against various Gram-positive and Gram-negative bacteria and towards two fungal species. 24,25