--Anti-Saccharomyces cerevisiae antibodies (these react to yeast proteins), which are often ordered for those with intestinal symptoms. Measuring these is a sort of indirect way to check for celliac, on the theory that intestinal yeat overabundance is likely in malabsorptive diseases. The antibodies can can be found in almost any autoimmune intestinal condition, from celiac/gluten sensitivity to Crohn's.