Microbiological safety of essential oils used in complementary therapies and the activity of these compounds against bacterial and fungal pathogens

To determine the safety of plant essential oils we determined the sterility of eight of these products obtained from retail outlets. In addition, the ability of oils to support the growth of fungal and bacterial pathogens was examined. The antimicrobial activity of these products against seven bacte rial species and Candida albicans was also investigated. All oils and their respective carriers were sterile. Methicillin-resistant Staphylococcus aur eus and Pseudomonas aeruginosa were unable to survive in oils for longer th an 6 h, whereas C. albicans was able to survive, but not multiply, in ylang ylang oil for at least 48 h.