Coeliac disease (CD) is a malabsorptive disorder of the small intestine resulting from ingestion of
gluten. The HLA risk factors involved in CD are well known but do not explain the whole genetic
susceptibility. Several regions of potential linkage on chromosomes 3q, 5q, 10q, 11q, 15q and 19q
have already been reported in the literature. These six regions were analyzed with the Maximum Lod
Score method on a dense set of markers. A new sample of 89 Italian sibpairs was available for study.
There was no evidence for linkage for any of the regions tested, except for chromosome 5q. For this
region, our data, as well as a sample of 93 sibpairs from our first genome screen (Greco et al. 1998),
are compatible with the presence of a risk factor for CD with a moderate effect.