Leishman’s stain is widely used in hematology for staining blood films to differentiate and identify blood cells, particularly in the diagnosis of blood disorders. It is especially valuable for visualizing parasites like *Leishmania* and *Plasmodium* (malaria) in blood samples. The stain helps in highlighting the nuclei, cytoplasm, and granules of white blood cells, enabling the identification of cell types such as lymphocytes, monocytes, and granulocytes. It is also useful in detecting abnormal cells, aiding in the diagnosis of conditions like leukemia. Its application extends to research studies involving blood cell morphology and parasitic infections.