How is this test done?
- Collect 1 of your stools in a dry container. ...
- Use a wooden applicator to put a small smear of stool (from the outside of the stool) on the card or slide you have been given.
- Seal the sample and write your name and date on it.
- Flush the unused stool down the toilet.
What does a positive guaiac test look like?
Heme, a component of hemoglobin found in blood, catalyzes this reaction, giving a result in about two seconds. Therefore, a positive test result is one where there is a quick and intense blue color change of the film.
What do doctors test for guaiac?
The stool guaiac test looks for hidden (occult) blood in a stool sample. It can find blood even if you cannot see it yourself. It is the most common type of fecal occult blood test (FOBT). Guaiac is a substance from a plant that is used to coat the FOBT test cards.
