Frequency of swallowing in duodenal ulceration and hiatus hernia.

inflamed mucosa with no parasites. Sections from the mucosa of ileum and caecum and the rectal biopsy specimen, trypsinised and stained with antisera to immunoglobulins, kappa and lambda chains, and IgA secretor piece, using the immunoperoxidase method, showed similar numbers and distributions of positive lymphocytes to those in normal controls. Peripheral lymphocyte subpopulations showed normal Tand B-cell proportions with a normal distribution of surface immunoglobulin classes on B cells. T-cell transformation was normal after stimulation by phytohaemagglutinin. Serum