ارزيابي و كنترل خوردگي ميكروبي در صنعت قند نيشكري

IN-VITRO Study of Some Plant Essential Oils on Glardia Cyst Comparison with Metronidazol

Giardiasis is an intestinal illness caused by a microscopic parasite called Giardia lamblia. It is fairly a common human intestinal flagellate called Giardia intestinally. Patient harboring these protozoa can be a symptomatic carrier or exhibit all or some of the following symptoms: diarrhea, dehydration, abdominal pain and weight loss and fatty stool in high infection. In some parts of the world and in Iran,Giardiasis is an endemic disease. In this study, effects of some plant essential oil extracted from Thymus vulgarize, Zataria multiflora, Myrtus communis and Ferula-asa-feotida and resin of the latter was investigated on Giardia cyst for 30 and 60 min, in-vitro. The cysts were isolated from stool by Bingham method and washed and counted with hemocytometer. The cysts were contacted with essential oils and dead cysts were distinguished by eosin solution. The Thymus vulgarize essential oil was the most effective than others comparison with metronidazol as standard. The average cyst cidal effects of Thymus vulgarize and metronidazol were corresponding to 94.06 7.5 and 85.9 7.3. The effect of other plant essential oils such as Zataria multiflara, and Myrtus communis on cyst was good but essential oil and resin of Ferula-asa-feotida had the least effect. This study determined some plant essential oils have benefit effect on Giardia cyst and are suitable for further study to make herbal remedy from them.