Giemsa Stain is used for staining chromosomes, cells, blood, tissue sections, bacteria, protozoan, parasites, and others.When blood films are stained using Giemsa stain, the nucleus and the cytoplasm of white blood cells take on the characteristic blue or pink coloration. The use of purified eosin and thiazine dyes minimizes lot-to lot variation.Giemsa stain is specific for the phosphate groups of DNA. It attaches itself to regions of DNA with high amounts of adenine-thymine bonding.