"ASCA Screen ELISA is a solid phase enzyme immunoassay (ELISA) employing highly purified mannan for the combined quantitative and qualitative detection of anti Saccharomyces cerevisiae IgA and IgG antibodies (ASCA) in human serum.
ASCA recognize specific mannan, a component of the outer cell wall of yeast. The assay is highly specific and sensitive for Crohn's disease."