Immunofluorescence study of mucosal B lymphocytes in bile reflux gastritis.

Intracelluar immunofluorescence staining was used to identify lymphoid cells from human gastric mucosa. Staining of serial sections for each of the five classes of immunoglobulin-containing cells revealed the presence of all classes. Their relative frequencies in the antral mucosae of 30 patients with bile reflux gastritis were 51% IgA, 16% IgM, 18.