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Reducing Substances, stool
|Test group||Reducing substances|
|Performed by||Parnassus & Mission Bay Hematology|
|In House Availability||Run 0800-1600 daily.|
|Container type||Clean container|
|Amount to Collect||See preferred volume|
|Sample type||Fresh liquid stool|
|Preferred volume||10 gm|
|UCSF Rejection Criteria||Formed stool received.|
|Normal range||< 500 mg/dL|
|Synonyms||Acid hydrolysis; Reducing sugars; Disaccharide deficiency; stool analysis|
|Turn around times||1 day.|
|Additional information||Reducing substances, if present, are reported semiquantitatively as equivalent to the activity of 0 (negative), 250, 500, 750, 1000, 2000 or > 2000 mg/dL of glucose (these correspond to the formerly used readings of negative, trace, 1+, etc.).
Although sucrose is not a reducing sugar it is extensively hydrolyzed by stool flora to the reducing sugars glucose and fructose and thus is detected in the assay for reducing substances in stool.
Acid hydrolysis to detect stool sucrose is unnecessary and will not be done.
See also pH, stool
|Last Updated||1/27/2015 2:40:24 PM|