Intestines and stomach

Determination of igA antibody levels against tissue transglutaminase.

Determination of igG antibody levels against Helicobacter.

Test for the presence of fecal occult blood.

Testing the level of carcinoembryonic antigen (CEA, carcinoembryonic antigen carcinoembryonic antigen) in the blood.

Test the level of immunoglobulin A (IgA) in the blood. Immunoglobulins Class A are present in both plasma and mucosal secretions mucous membranes.