Abstract
Giardia intestinalis is a highly common parasite in humans. It is cosmopolitan and can remain asymptomatic. Most commonly, Giardia infection causes intestinal disorders such as diarrhea and abdominal pain. Severe infection can produce a malabsorption syndrome. Refractory giardiasis is due to some reservoirs such as the diverticulum or gallbladder. The authors present an uncommon case of chronic giardiasis due to the appendix as the reservoir. The parasitological examination of the gall-bladder was normal, while the appendix revealed a great number of Giardia. The patient was cured after the appendectomy.