Cytophotometric characterization of nuclei in chicken bursal lymphocytes

Cytophotometric determinations on gallocyanine-chromalum stained preparations reveal the presence in the bursa of Fabricius of a characteristic lymphoid cell type within the medulla of bursal follicles. In comparison with the cortical lymphocytes the nuclei of these cells show lower volume and nucleic acid content. Such differences are not detectable at hatching but are quite clear in the fully grown organ.