[Parasitic duodenitis].

A study on 100 patients bearing high-localization intestinal parasitism associated to clinical manifestations compatible with an ulcerous syndrome is performed. The frequency of the parasites found is outlined, and Giardia lamblia comes first in the order of appearance. The different tests used to reach the diagnosis of this entity are assessed and emphasis in laid on the value of biliary drainage, both in the detection of parasites and the biliary sepsis that frequently accompanies them. In testing different therapeutic schemes, the value of metronidazole associated to tetracycline for intestinal giardiasis and of Alcopar for Necator americanus in stressed.