Cytochemical aspects of the peripheral blood cells of Oreochromis (Tilapia) niloticus. (Linnaeus, 1758) (Cichlidae, Teleostei): part II

morphologicaly, seven types of cells were identified in the blood of oreochromis niloticus: erythrocytes, thrombocytes, neutrophils, eosinophils, basophils, lymphocytes and monocytes. glycogen was present not only in the cytoplasm of neutrophils and thrombocytes but also in some lymphocytes and monocytes. the positive reaction for myeloperoxidase and sudan black was observed in neutrophils and eosinophils. the bromphenol blue method was strongly positive for erythrocytes and eosinophils.