Differentiation of eosinophilic granulocytes of carp (Cyprinus carpio L.)

Abstract

Electron-microscopic studies were conducted to observe ultrastructural changes during differentiation of eosinophilic granulocytes in carp (Cyprinus carpio L.). Differentiation at the myelocyte stage was found torelate to specific granules made of dense and light fields. By maturation they assume a mosaic-like texture and in each granule of mature granulocytes, a light, central 'internum' and a peripheral dense wrapper can be distinguished. The activity of peroxidase and acid phosphatase is located in the internum and of peroxidase in the wrapper of the granules.