WHAT IS PARASITE SCREEN TEST (OVA AND PARASITES, TAPE TEST)?
Microscopic examination of the stool to detect parasites at various stages of development from ova through mature or motile forms. A parasite screen is performed on a stool sample when a parasitic infection is suspected as evidenced (usually) by diarrhoea of unknown origin. A parasite is an organism that survives at the expense of a host organism. Frequently, protozoa, amebas, and worms infect the gastrointestinal tract from contaminated food and water sources. Parasites, larvae, or ova may not be continuously present in faecal specimens; thus, at least three samples, spaced 2-3 days apart, or as prescribed, are taken. For a screen, the laboratory will need to know travel information and will likely perform screens based on the parasites usually found in that location. Laboratory preparations for each parasite to be identified may vary.