Summary
Electron-microscopic studies of lymphoid tissues from bovine fetuses and from calves disclosed a non-lymphoid cell type in the thymus-dependent zones of secondary lymphoid tissues and in the thymus that is distinguishable from reticulum cells, epithelial and endothelial cells, and macrophages. Based on morphological and topographical criteria, the cell is identified as the interdigitating cell. In addition, studies of the tissues of normal and virus-challenged fetuses, and of conventionally reared calves, indicated that the interdigitating cells originate from monocytoid cells, which undergo differentiation in the thymus-dependent zones during an immune response.
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Ohmann, H.B., Basse, A. Interdigitating cells in the lymphoid tissues of bovine fetuses and calves. Cell Tissue Res. 235, 153–158 (1984). https://doi.org/10.1007/BF00213735
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DOI: https://doi.org/10.1007/BF00213735