Summary
In the present study comparative aspects of the ultrastructure of the spleen were analyzed in non-immunized and T-dependent antigen-challenged natterjacks, Bufo calamita. Special attention is focused on the role of the non-lymphoid components in the splenic immunoreactivity. Ten days after primary immunization with sheep erythrocytes, splenic lymphoid follicles increase considerably in number and size. By that time, lymphoblasts, medium and large lymphocytes abound in the periphery of the white pulp near the marginal zone. Meanwhile, in the red pulp numerous monocytes migrating across the sinusoidal walls apparently transform into giant, dendritic-like cells. Twenty days after immunization the splenic lymphoid follicles decrease in number, although certain reactivity persists and numerous plasma cells occur in the cell cords and sinusoids of the red pulp. These results are discussed comparatively with those reported in other lower vertebrates.
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Barrutia, M.S.G., Villena, A., Gomariz, R.P. et al. Ultrastructural changes in the spleen of the natterjack, Bufo calamita, after antigenic stimulation. Cell Tissue Res. 239, 435–441 (1985). https://doi.org/10.1007/BF00218024
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DOI: https://doi.org/10.1007/BF00218024