This image from a light microscope shows many eosinophils from human blood that have been stained with Wright-Geimsa. The eosinophils are distinctive for the brilliant red-pink in the cytoplasm around the bi-lobed purple-blue nucleus. This red stain is associated with the intensely basic granules in the cytoplasm of eosinophils. Other cells showing pale blue cytoplasms are lymphocytes (few) with simple circular dark blue nuclei and monocytes (few) with more complex, dark blue nuclei. A neutrophil (segmented purple-blue nucleus, light pink cytoplasm) and a basophil (segmented purple-blue nucleus, dark red/purple granules) are also present. Original magnification, X400.