<prompt> The presence of anti-saccharomyces cerevisae antibody is a surrogate marker of one of the following:Coeliac diseaseCrohns diseaseUlcerative colitisTropical sprue  <response>: Answer is B Crohns disease:Antibodies to the yeast Saccharolnyces cerevisiae ASCA are found in 60 - 70 of patients with Crohns disease and 10 - 15 of patients with ulcerative colitis.- 