Can some sort of parasite cause the symptoms of celiac disease?

Parasites: There are all degrees of gastrointestinal manifestations with celiac patietns. Some are even latent. A number of intestinal parasites can cuase symptoms that produce similar symptoms but testing can seperate the two problems. One could even have both.

Giardia lamblia: Giardia lamblia, a single call protozoan (think paramecium) parasite is found in fresh water. It takes up residence in the small intestine causing symptoms mimicking celiac disease. The organism may be detected in a stool specimen. Sometimes endoscopy is necessary for diagnosis. Treatment is curative.