UREDF - Specimen: Reducing Substance, Feces

Test Catalog

Test ID: UREDF    
Reducing Substance, Feces

Specimen Type Describes the specimen type needed for testing


Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Supplies: Stool container, Small (Random), 4 oz (T288); Stool Collection Kit, Random (T635)

Container/Tube: Stool container (T288)

Specimen Volume: 3 g

Collection Instructions:

1. Collect a loose, random stool specimen.

2. Freeze immediately.

3. If collecting from an infant, use nonabsorbent diapers to collect the specimen. If stool is collected in a disposable diaper, the solid and liquid stool must be combined. The liquid portion of the stool can be aspirated from the diaper using a syringe or alternatively can be expressed from the diaper into a cup. If a diaper has gel absorption, a cotton ball will be necessary to collect the liquid portion of the stool.

4. It is critical that urine is not also mixed with the specimen. Urine will interfere with the results.

Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.

2 g

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected








Specimens from timed collection (24, 48, 72 hour) or formed stool

Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
FecalFrozen7 days