This complete microscopic examination for ova and parasites should be limited to patients with diarrhea and pertinent travel history, exposure history, an immunocompromised condition, or a high pre-test probability for parasitic infection. The most common parasites (Giardia
) are best found using the stool antigen test only. See Giardia and Cryptospordium Screen.
In some clinical contexts, species-specific serology may be the preferred test. This exam does not include special stains to specifically detect Cyclospora
, and Microsporidium