A parasite survives on other organisms. They depend on the host organism and affects the host organism.There are at least 1000 species of parasite capable of living in human beings. A Smear test is a test used to identify for Spirochetes, Trypanosoma, Plasmodium species, and Babesia that are found in the human blood. By looking at the blood smear under a microscope, parasitic diseases such as filariasis, malaria, and etc. can be diagnosed. Giemsa Stain methodology is used in blood smears for parasite detection.