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Fecal DNA Quantitative Urine Leukocyte Assay (via Probe-Based Detection)

Published: August 9, 2026Updated: August 16, 2026

This test measures genetic material from your stool and white blood cells in urine, often used to assess inflammation or infection in the gastrointestinal tract.

Quick summary

["Helps diagnose or monitor gut-related conditions like inflammatory bowel disease or infections."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
99018-4
Short code
E faecium DNA Ur Ql NAA+probe
Synonyms
E faecium DNA Ur Ql NAA+probe
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What This Test Measures

The test detects fecal DNA and urinary leukocyte DNA using a specialized probe. Fecal DNA can indicate gut health, while urinary leukocytes (white blood cells) may signal inflammation or infection in the urinary tract or gastrointestinal system. This combination helps identify conditions like inflammatory bowel disease (IBD), infections, or other gut-related issues.

Why It Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like persistent diarrhea, abdominal pain, unexplained weight loss, or if you’re suspected of having a gastrointestinal infection or inflammatory condition. It can also be used to monitor ongoing conditions.

Sample Collection and Preparation

A stool sample and urine sample are collected separately. The stool sample is analyzed for DNA, while the urine sample checks for leukocyte DNA. Results are processed using a molecular probe technique to detect specific genetic markers.

What the Results Mean

Results are qualitative (present/absent) rather than quantitative, meaning they indicate whether abnormal levels of DNA or leukocytes are detected. Elevated findings may suggest inflammation, infection, or other gastrointestinal issues that need further evaluation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Fecal DNA/Leukocyte Test

Frequently asked questions

Is this test painful or invasive?
No, this test is non-invasive. You’ll need to provide a stool sample and a urine sample, but no blood draw or needle is required.
How soon will I get my results?
Results are typically available within 24 to 72 hours, depending on lab processing times.
Can I eat or drink before this test?
For stool testing, avoid certain medications (like antibiotics) for 2–3 days before collection, as they may affect results. For urine, standard dietary restrictions don’t apply unless specified by your provider.
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy