What does the stool blood test detect?

Two types of tests. One type tests for peroxidase activity associated with hemoglobin but also present in other molecules. An other type tests for human globin protein and detects bleeding in the colon only. Both are intended to check for blood in stool.
Blood. If you are referring to the standard fecal occult blood test in the office and it is done as a colon cancer screen.

Related Questions

What should I avoid prior to taking the stool blood test?

Bismuth and Iron. Generally, if you can, you should avoid medications that contain bismuth such as pepto-bismol & iron tablets/pills for a few days. This is because it can stain the stool black & sometimes give a false positive reading on the fecal occult-blood test (fobt). If you're on blood thinners such as coumadin, (warfarin) aspirin, or plavix, let the doctor ordering your test know too but don't stop unless told to. Read more...
Red meat. The tests are very sensitive for blood in your stool and if you eat red meat it may be a false positive as the "blood" would be from the red meat and not your bowels. Read more...

If I don't see a reaction when I use a stool blood test card, how can tell if the test is negative or if it's defective?

View control results. Most occult stool blood tests have a control spot on the paper that turns color (usually blue) . If the control turns color but the stool sample under the paper does not then your test is negative. If the control spot does not turn color then your test paper or solution is not working properly. Read more...
Ask your physician. After you collect the sample, you must send it back to your physician. There is a solution that is placed on the back of the card to make the color change happen. A small blue circle (control) will appear at the bottom of the test area. If this is the only color change present on the card, the test is negative and valid. Read more...

How can you carry out a stool blood test?

Use prepackaged kit. Most general medical doctors will have cards that allow you to take smear of your stool (fingertip or cotton swab) apply it to the card fold it closed and deliver it to your doctor for testing. The doctor or nurse will take a chemical solution, apply it to the card/stool specimen and observe the reaction. If the reaction is positive a colonoscopy may be ordered, to look for cancer or polyps. Read more...
FOBT. Using a fecal occult blood test where you palce a smear of stool on on a specialized card and then add a specialized chemical to it. It will change color if blood is present. Read more...

What could cause a positive iFOBT (stool blood) test in a young 23 yr old male? And is it serious? Doc referred me to GI

Many things! I'm assuming your doc ordered the test for a symptom, or anemia work up. If so, could be stomach ulcer, ulcer anywhere along gut, to bleeding diverticula in colon or even a hemmoroid. Also, vitamin with iron, nosebleed (because swallowed blood) or anything where blood gets into GI tract. Older tests would also turn positive if you had eaten red meat or spinach due to iron. Hope that helps! Read more...
True or false +'s... ...are possible. Whether blood is ingested, or originates in your gut, an occult blood test may be positive. Consider stopping any aspirin or NSAID use now (unless prescribed), and keep your GI appointment please. Read more...

Should I take Flagyl for cdiff if GI never checked me? No stool, blood test. Should I ask further examinations before taking something I might not need?

Depends. Sometimes patients are given emperic therapy based on complaint. Clostridium difficile can cause a GI illness presenting as diarrhea following antibiotic use. It can be easily treated with Flagyl but if not treated may lead to severe illness, protracted hospitalization and even death. If you have concerns speak with your doctor. There is a stool test available. Read more...