Inhibition of enteric parasites by emulsified oil of oregano in vivo

Phytother Res. 2000 May;14(3):213-4. doi: 10.1002/(sici)1099-1573(200005)14:3<213::aid-ptr583>;2-u.


Oil of Mediterranean oregano Oreganum vulgare was orally administered to 14 adult patients whose stools tested positive for enteric parasites, Blastocystis hominis, Entamoeba hartmanni and Endolimax nana. After 6 weeks of supplementation with 600 mg emulsified oil of oregano daily, there was complete disappearance of Entamoeba hartmanni (four cases), Endolimax nana (one case), and Blastocystis hominis in eight cases. Also, Blastocystis hominis scores declined in three additional cases. Gastrointestinal symptoms improved in seven of the 11 patients who had tested positive for Blastocystis hominis.

Publication types

  • Clinical Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Amebiasis / drug therapy
  • Animals
  • Blastocystis Infections / drug therapy
  • Blastocystis hominis
  • Emulsions
  • Endolimax
  • Entamoebiasis / drug therapy
  • Feces / parasitology
  • Humans
  • Intestinal Diseases, Parasitic / drug therapy*
  • Magnoliopsida*
  • Plant Oils / therapeutic use*


  • Emulsions
  • Plant Oils