5Staining of blood films Romanowsky stains are universally employed for routine staining of blood films.It depends on two components, namely, azure B(trimethylthionin) and eosine Y(tetrabromo-fluorescein).The original Romanowsky combination was polychrome methylene blue and eosine.The presence of basic grouping on the haemoglobin molecule results in its affinity for acidic dyes and its staining by eosin. The nucleic acids uptake of the basic dye azure B.Granules in cytoplasm of neutrophil are weekly stained by the azure complexes( eosinophilic granules-alkalin grouping which stains with acidic component of dye wherase basophilic granules which has an affinity for the basic component of dye).
6Types of Romanowsky stains Leishman’s stainMay-Grunwald stainJenner’s stainGiemsa’s stainJenner-GiemsaMay-Grunwald-Giemsa
7Red cell morphologyIn health, the red cells have round smooth contours and have diameters of 6.0 to 8.5µm.Abnormalerythropoiesis:Anisocytosis (size: micro or macro).Poikilocytosis (shape)Basophilic stipplingAcanthocytosis, target cell and sickle cell.
8Erythrocyte inclusion (Howell-jolly bodies, Pappenheimer bodies According HB: hypochromatic and hyperchromatic.Spherocytosis, elliptocytosis (cell membrane of red cell).