[Diarrhea cause by parasites].

Parasites, once an exclusively tropical problem, are rare causes of diarrhea in our countries. Increasing tourism and immune deficiencies due to treatment or to Aids lead to an increase of intestinal parasites in western countries. The most frequent pathogenic parasites are Giardia lamblia and Entamoeba histolytica but other organisms like Cryptosporidia seem to be of increasing importance and have to be considered in diarrhea of unknown origin.