Celiac Disease & Gluten-free Diet Information at Celiac.com - http://www.celiac.com
How often must a negative test be repeated in suspect individuals? (This question has two aspects: for an individual with existing symptoms, and for a sibling of a known celiac.)**
http://www.celiac.com/articles/24/1/How-often-must-a-negative-test-be-repeated-in-suspect-individuals-This-question-has-two-aspects-for-an-individual-with-existing-symptoms-and-for-a-sibling-of-a-known-celiac/Page1.html
Scott Adams

In 1994 I was diagnosed with celiac disease, which led me to create Celiac.com in 1995. I created this site for a single purpose: To help as many people as possible with celiac disease get diagnosed so they can begin to live happy, healthy gluten-free lives. Celiac.com was the first site on the Internet dedicated solely to celiac disease, and since then it has become an invaluable resource to people worldwide who seek information about celiac disease and the gluten-free diet.

In 1998 I created The Gluten-Free Mall, Your Special Diet Superstore! which was also another Internet first—it was the first gluten-free food site to offer a shopping cart-style interface, and the ability for people to order gluten-free products manufactured by many different companies at a single Web site.

I am also co-author of the book Cereal Killers, and founder and publisher of Journal of Gluten Sensitivity.

 
By Scott Adams
Published on 07/26/1996
 
Vijay Kumar, M.D., Research Associate Professor at the University of Buffalo and President and Dir

Vijay Kumar, M.D., Research Associate Professor at the University of Buffalo and President and Director of IMMCO Diagnostics: If the test is negative and there is a strong suspicion of CD, it must be repeated after several weeks (3-4 weeks), especially after a high gluten intake. We did a study of two cases with DH who were serologically negative. However, a gluten challenge 1g/Kg body wt/day resulted in positive serology; the results became normal on a gluten free diet.

If you are a relative of a celiac disease patient and are on a regular diet and the serology performed by an experienced laboratory is negative then there may not be any need for retesting until and unless clinically justified.

Karoly Horvath, M.D., Ph.D., Associate Professor of Pediatrics; Director, Peds GI & Nutrition Laboratory; University of Maryland at Baltimore: There is no rule for it. If a family member with previous negative tests experiences any gastrointestinal symptoms associated with CD, he/she should undergo serological testing as soon as possible. It is well known that up to 15% of the family members of a patient with celiac disease may have the asymptomatic (latent or silent) form of celiac disease, although they have positive serological tests and have the pathological changes in the upper part of the small intestine. It is also evident that there are at least three developmental stages of mucosal lesions (Marsh MN. Gastroenterology 1992;102:330-354) and celiac disease may manifest at each period of life. That is why we recommend a repeat test every 2-3 years in first degree relatives of celiac patients.