[Electron immunocytochemistry of lymphocyte surface immunoglobulins in the bursa of Fabricius in the pre- and early postnatal ontogeny of chickens].

The appearance and localization of surface immunoglobulins on B-lymphocytes of the bursa of Fabricius of developing chick embryos and chicks were studied by immuno-electron-cytochemical peroxidase-antiperoxidase (PAP) method. Ultrastructural characteristics of marked and unmarked lymphocytes of the bursa of Fabricius was shown. The increase in the density of reaction product on PAP-complex in the course of lymphocytes differentiation was established.