This test is used to evaluate the presence of water borne parasites as well as other parasites, bacteria, and fungus. The most common microscopic human parasites (Protozoa) are transmitted via drinking water contaminated with fecal material from infected persons. Approximately 1/4th of US households carry parasites in their water. Approximately 1/5th of US households supplied by surface water treatment plants carry parasites such as Cryptosporidum and Giardia. This test also screens for the amoebas and Schistosomiasis.