Giardiasis. Functional, immunological and histological study of the small bowel. Therapeutic trial with a single dose of tinidazole.

Fourteen patients between the ages of 9 months and 5 years with chronic diarrhea and giardiasis were studied. Ten were eutrophic and 4 undernourished. The parasitological diagnosis was based on stool examination, a trophozoite search in duodenal aspiration, mucus adhered to mucosa and parasite identification in the intestinal biopsy material.