Top
10
Doctor insights on: Stool Guaiac Test

Share

Feces (Definition)

Feces is the product of ...Read more


3

3
If guaiac is negative can you still have bleeding in GI tract? Thank you.

If guaiac is negative can you still have bleeding in GI tract? Thank you.

Yes: If it is an upper GI bleed and you take guaiac of stool, it will take time before the blood gets there, so the initial guaiac could be negative. If the bleeding is intermittent and it stops for several days before rebleeding, the blood can be cleared and guaiac turn negative (although that takes days) then positive later. ...Read more

4

4
Is the stool test "positive" when there is only a small speck of blue-green color on the test area?

Is the stool test "positive" when there is only a small speck of blue-green color on the test area?

Guaiac test +: Guaiac (leuco-dye) testing has been available for >100 years--the colorless dye turns blue or green in presence of adequate amounts of peroxidase-like substances (e.g. Hemoglobin) & hydrogen peroxide. Ingested iron, certain fruits & vegetables, some drugs, toilet bowel sanitizers give false-positive reactions. Method of collection & underlying pathology may account for your + finding--see doctor. ...Read more

See 1 more doctor answer
5

5
How accurate are the results from a colonoscopy as compared to the results from an at-home stool test?

How accurate are the results from a colonoscopy as compared to the results from an at-home stool test?

Colonoscopy better: Two stool tests available. Guaiac for blood not accurate picking up blood from hemorrhoids. Stool test for p53 gene mutation does not tell that tumor is present but that stool shows colonocytes with potential for being associated with cancer. Obviously colonoscopy which provides direct visualization of bowel most accurate with bx available ...Read more

6

6
What precautions should I take before taking a blood stool test?

What precautions should I take before taking a blood stool test?

Avoid 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

See 1 more doctor answer
7

7
2 yo has black flecks in stool sometimes. He's acting & eating normal. Hemoccult test 2 months ago negative. I still worry about dry blood. Should i?

2 yo has black flecks in stool sometimes. He's acting & eating normal. Hemoccult test 2 months ago negative. I still worry about dry blood. Should i?

No....: The black flecks can be food related or blood related. You can have three separate stools guaiac tested as well. Take a look at diet and see what might me being digested and possibly then appearing as black flecks...Also could this 2 year old have eaten something like crayons that might be doing this? ...Read more

See 1 more doctor answer
8

8
I've had dark black feces. No iron pills no bismuth. , and the ER Dr took no stool sample. Just inserted a finger to test for blood. Second opinion?

Talk to your PCP: If you are 50 you are due for a screening colonoscopy. Your PCP should be able to hand you guaiac strips to check your stool. Do not take any over the counter meds- specifically Advil, Motrin, Aleve. Hope it helps. ...Read more

9

9
Abnormal stool test results.. Worried, what to do?

Abnormal stool test results.. Worried, what to do?

Vague: First provide as complete a story and data to your doctor. It may be trivial, or possibly significant. Please re-ask your question with more information. ...Read more

10

10
I have a stool test to take, does it need to go for testing right away?

I have a stool test to take, does it need to go for testing right away?

Stool test: It depends what the stool test is for, but it can be kept in the fridge for some time before it is trasported to the lab for testing. ...Read more