Test Overview
Test Methodology

Qualitative Colorimetry

Test Usage

Indole is produced by bacterial action on tryptophan in the small intestine. Most is eliminated in the feces; the remainder is absorbed and detoxified in the liver and excreted as indican (indoxyl sulfate) in the urine. The amount of indican normally excreted in the urine is small. However, large amounts are produced as a results of high protein diets and in various disorders such as Hartnup disease, intestinal obstruction, gastric cancer, hypochlorhydria, biliary obstruction, and malabsorptive conditions such as sprue and blind-loop syndrome.

Reference Range *

Negative

Test Details
Days Set Up
Daily
Analytic Time

2 - 8 days

Soft Order Code
MMLR
Laboratory
Sendout
Reference Laboratory
Mayo FUIQL (57488) (ARUP 0080403)
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect random urine with no preservatives. Mix well, transfer two 4 mL aliquots (minimum 3 mL) into plastic transport tubes, and freeze.

Normal Volume
9 mL urine (divided into 2 4.5 ml aliquots)
Minimum Volume
3 mL urine
Storage Temperature
Ambient: Unacceptable; Refrigerated: 8 hours; Frozen: 1 year.
Additional Information

Test sent to Mayo Medical Laboratories; performed by ARUP Laboratories.

Billing
CPT Code
81005
Fee Code
20497
LOINC
2474-5
NY State Approved
No