From scimedx diagnostic.
5396EL 96 Tests.
Staining of the endomysium around the smooth muscle fibers in the monkey esophagus is considered positive. Patients reactions should be compared with the positive control contained in the kit. IgA SMA reactivity should be considered and eliminated before reporting a positive EmA. IgA SMA stains only the myofibril and not the network between them in which the endomysial antigen is found.