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  • Title: Distribution of T and B lymphocytes in jejunal and ileocaecal Peyer's patches of lambs.
    Author: Larsen HJ, Landsverk T.
    Journal: Res Vet Sci; 1986 Jan; 40(1):105-11. PubMed ID: 3486440.
    Abstract:
    Jejunal (JPPs) and ileocaecal (IPP) Peyer's patches in lambs were studied by employing the indirect and the avidin-biotin-peroxidase methods, using antibodies to sheep IgM and thymocytes. Thymocyte sera absorbed with IPP germinal centre cells showed specificity for T cells in the thymus, lymph nodes and Peyer's patches. Whereas JPPs had large interfollicular T cell areas, IPP mainly contained B cells, although small triangular T cell areas were found at the apex of the follicles. Some T cells were also found in the dome and corona region of JPPs and IPP. While germinal centres of JPPs had about 40 per cent of IgM-positive cells, IPP germinal centres contained about 80 per cent of such cells. Negative or weak IgM-positive cells were seen in the peripheral zone of IPP germinal centres, contrasting with surface IgM-positive cells in the central zone, and indicating a centripetal migration of maturing lymphocytes.
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