The identification of malarial parasites and other blood parasites is used to determine treatment and prognosis. Babesia and other blood parasite are noted and reported. Microfilaria can be detected from a giemsa stain. However, this test is not recommended for the detection of microfilaria. One negative observation cannot rule out blood parasites. Giemsa is a dye consisting of methylene blue-eosin and methylene blue. It is named after Gustav Giemsa, a German chemist and bacteriologist. This dye solution is used in histopathologic diagnosis. It is used in staining blood films. Giemsa stain is also a differential stain, such as when it is combined with Wright stain to form Wright-Giemsa stain. It can be used to study the adherence of pathogenic bacteria to human cells. It differentially stains human and bacterial cells purple and pink respectively.