Parasitology Research

, Volume 98, Issue 6, pp 557–560 | Cite as

Oregano (Lippia spp.) kills Giardia intestinalis trophozoites in vitro: antigiardiasic activity and ultrastructural damage

  • Martha Ponce-Macotela
  • Yadira Rufino-González
  • Angélica González-Maciel
  • Rafael Reynoso-Robles
  • Mario Noé Martínez-GordilloEmail author
Original Paper


In the world, giardiosis is still a very important parasitic disease; only in Asia, Africa and America, there are more than 200 million of infected people in a year. The usual treatments are drugs that produce undesirable secondary effects, perhaps favouring the resistant strain selection. One alternative is to research compounds from plants used as antidiarrhoeic or antiparasitic in the traditional medicine. In a previous work, we found that Lippia beriandieri (Oregano) revealed to be more potent than tinidazole, a common antigiardiasic drug. In this current work, we tested the cell viability by re-culture and reduction of MTT-tetrazolium salts to MTT-formazan, and we showed the effect of oregano ethanolic extracts against Giardia intestinalis (synonyms: Giardia duodenalis, Giardia lamblia) trophozoites at concentrations ranging form 58 to 588 μg. We demonstrated the ultrastructural injury produced by oregano extracts in this parasite. Trophozoites lost their size and shape and showed damage in nucleus structure, perhaps by breaking the pattern of nucleoskeleton proteins.


Nuclear Envelope Tinidazole Nitrofuranes Nitazoxanide Giardia Lamblia 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Martha Ponce-Macotela
    • 1
  • Yadira Rufino-González
    • 1
  • Angélica González-Maciel
    • 2
  • Rafael Reynoso-Robles
    • 2
  • Mario Noé Martínez-Gordillo
    • 1
    Email author
  1. 1.Parasitología ExperimentalInstituto Nacional de Pediatría, Insurgentes SurMéxicoMexico
  2. 2.Microscopia Electrónica del Instituto Nacional de PediatríaMéxicoMexico

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