Abstract: | Jejunal mucosal biopsies were obtained from 13 patients with acute enteritis. Ten patients were examined again after recovery. Quantitative analysis of the findings in immunofluorescence microscopy showed a significant increase of IgA- and IgM-containing cells during acute enteritis. After recovery the number of immunoglobulin-containing cells and their distribution within the different immunoglobulin classes were within normal limits. |