Diagnosing a parasitic worm infection Fecal test. A fecal test involves submitting a stool sample and having it checked for parasites, larvae, or eggs. . Blood test. A blood test can be used to detect some types of parasites in the blood. Imaging tests. . Tape test. . Colonoscopy.
What poop looks like when you have worms?
In stools, the worms look like small pieces of white cotton thread. Because of their size and white color, pinworms are difficult to see. The male worm is rarely seen because it remains inside the intestine.
How do you check a person for worms?
One way to detect pinworms is to shine a flashlight on the anal area. The worms are tiny, white, and threadlike. If none are seen, check for 2 or 3 additional nights. The best way to diagnose this infection is to do a tape test.
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