The Inhibitory Effect of Some Natural Essential Oils upon Prototheca Algae in vitro Growth
Abstract
The aim of this paper was to present the in vitro evaluation of the inhibitory effect of some natural essential oils against unicellular algae from Prototheca genus. Ten P. zopfii isolates from cows mastitic milk samples and one P. wickerhamii referent strain (RE-4608014ATCC16529), from American Type Collection, were submitted to antifungal susceptibility testing by classical diffusimetric method. The natural products tested were represented by fir (Abies alba), savory (Satureja hortensis), peppermint (Mantha piperita), tea tree (Maleleuca alternifolia), grape seed and oregano (Oreganum compactum) essential oils. Comparative the efficiency of antimicrobial drugs (Itraconasole) was tested. For Prototheca zopfii tested isolates the highest efficiency were registered for: savory, mint and tea tree oils while P. wickerhamii proved to be sesitive for all natural products. Difficulties in treating protothecosis in humans and animals with conventional drugs and the potent in vitro activity of essentials oils demonstrated here raise the interest in further investigations on the therapeutic use of these non-conventional natural products.
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