The normal values listed here—called a reference range—are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what's normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab.
Stool analysis test
results usually take at least 1 to 3 days.
The stool appears brown, soft, and
well-formed in consistency.
The stool does not contain blood, mucus,
pus, undigested meat fibers, harmful
The stool is shaped like a tube.
pH of the stool is 7.0–7.5. 1
The stool contains less than 0.25
grams per deciliter (g/dL)[less than 13.9 millimoles per liter (mmol/L)] of sugars called reducing
The stool contains 2–7
grams of fat per 24 hours (g/24h). 1
The stool is black, red, white, yellow, or
The stool is liquid or very
There is too much stool.
The stool contains blood, mucus, pus,
undigested meat fibers, harmful bacteria, viruses, fungi, or parasites.
The stool contains low levels of
enzymes, such as trypsin or elastase.
The pH of the stool is less than 7.0 or
greater than 7.5.
The stool contains 0.25 g/dL
(13.9 mmol/L) or more of
sugars called reducing factors.
The stool contains more than 7 g/24h of fat (if
your fat intake is about 100 g a day).
Many conditions can change the results
of a stool analysis. Your doctor will talk with you about any abnormal results
that may be related to your symptoms and past health.
High levels of fat in the stool may be
caused by diseases such as
sprue (celiac disease),
cystic fibrosis, or other disorders that affect the
absorption of fats. The presence of undigested meat fibers in the
stool may be caused by pancreatitis.
A low pH may be
caused by poor absorption of
carbohydrate or fat. Stool with a high pH may mean inflammation in the intestine (colitis), cancer, or antibiotic use. Blood in the stool may be caused by bleeding
in the digestive tract.
White blood cells in the stool may be caused by inflammation of the intestines, such
ulcerative colitis, or a bacterial
a common cause of diarrhea in young children. If diarrhea is present, testing
may be done to look for rotaviruses in the stool. High levels of
reducing factors in the stool may mean a problem digesting some
Low levels of reducing factors may be caused by sprue
(celiac disease), cystic fibrosis, or malnutrition. Medicine such as colchicine
gout) or birth control pills may also cause low
WebMD Medical Reference from Healthwise
September 09, 2014
This information is not intended to replace the advice of a doctor.
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