ISHS Acta Horticulturae 680: III WOCMAP Congress on Medicinal and Aromatic Plants - Volume 6: Traditional Medicine and Nutraceuticals
ANTIMICROBIAL ACTIVITY OF THE ESSENTIAL OILS OF DITTRICHIA VISCOSA SUBSP. VISCOSA ON HELICOBACTER PYLORI |
| Authors: | D. Silva, E. Denham, L. Faleiro, G. Miguel, C. Cavaleiro, L. Salgueiro |
| Keywords: | false yellow head, gastric diseases, Listeria monocytogenes |
| Abstract:
Dittrichia viscosa subsp. viscosa (Compositae) is found on edges, wood clearings and in waste places of the Iberian Peninsula. Aerial parts of D. viscosa were collected at flowering phase in September-October 2001 around Lisbon, Portugal and the essential oils isolated by hydro-distillation for 4 h using a Clevenger-type apparatus. The oils were analyzed by gas chromatography and gas chromatography-mass spectrometry. Preliminary examination of the essential oils allowed the identification of 32 components. Only four components reached percent-ages over 5%: fokienol (11.8%), T-muurorol (7.9%), (E)-nerolidol (5.5%) and  -cadinene (5.0%). The essential oils were tested against Helicobacter pylori and Listeria monocytogenes. Essen-tial oils did not have antimicrobial activity against L. monocytogenes. The essential oil at 0.88 to 22.22 µg.ml-1 did not inhibit the growth of H. pylori, affected the growth slightly at 44.40 µg.ml-1, and completely inhibited the growth at 88.80 to 133.20 µg.ml-1. Results show that use of D. viscosa essential oil in the treatment of gastric
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