Giemsa stain
Romanowsky-type stains are widely used in the examination of blood, in the form of blood films, and in the microscopic examination of bone marrow biopsies and aspirate smears. Examination of both blood and bone marrow can be of importance in the diagnosis of a variety of blood diseases. In the United States the Wright and Wright-Giemsa variants of the Romanowsky-type stains are widely used, while in Europe Giemsa stain is commonly employed.