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Doctor insights on: Stool Guaiac Test

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Feces (Definition)

Feces is the product of ...Read more


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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

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How accurate is an o & p stool test?

How accurate is an o & p stool test?

Stool exam parasites: Stool samples for parasites are examined by a variety of techniques, but the sensitivity depends mostly on the level of infection (heavy vs. light) and the particular parasite. Certain types are readily identified by most lab personnel-- the common ones. Less common organisms with light infestations may be difficult to find and identify. Best to use an experienced lab. ...Read more

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Why would a person need a stool culture test?

Why would  a person  need a stool culture test?

STOOL CULTURE: We send for stool culture when a patient has bloody stools associated with fever to find out what kind of infection there is like dysentery, typhoid fever, etc. ...Read more

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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

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Possible reasons for abnormal stool test results.. Worried?

Possible reasons for abnormal stool test results.. Worried?

Please clarify: dozens of different tests can be done each with many possible results and meanings. It is your right to get an explanation now. ...Read more

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Can a stool test still be performed if I did not fill the test bottle?

Can a stool test still be performed if I did not fill the test bottle?

Usually: You do not need to fill the container. As long as there is a decent amount you should be fine. ...Read more

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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