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Fecal DNA (Quantitative) with Viral Load and Pathogen Detection by Probe-Based Assay

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

This test measures genetic material from your stool sample and checks for specific viruses or bacteria. It helps identify infections that may not be detected by standard stool cultures.

Quick summary

["Detects infections and genetic material in stool samples for better diagnostic accuracy."]

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

Key facts at a glance

LOINC
97618-3
Short code
E faecium DNA Snv Ql NAA+n-prb
Synonyms
E faecium DNA Snv Ql NAA+n-prb
Category
chemistry
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
non-probe-amp-tar
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
TAT
4–24 hours
Order
routine

What This Test Measures

The test analyzes DNA from your stool sample, including viral genetic material, to identify pathogens that may cause gastrointestinal infections. It also assesses the concentration of DNA for quantitative comparison.

How the Test Works

Your stool sample is processed to extract DNA, which is then analyzed using advanced molecular techniques (probe-based assays) to detect specific viral and bacterial genetic sequences. This method is highly sensitive and can identify infections that traditional cultures might miss.

Why It’s Done

Doctors may order this test if you have symptoms like persistent diarrhea, abdominal pain, or if you’re at higher risk for certain infections (e.g., after travel, in immunocompromised individuals, or in outbreaks). It helps confirm or rule out infections like norovirus, rotavirus, or other pathogens that don’t grow in standard lab cultures.

Sample Collection and Preparation

You’ll provide a fresh stool sample (collected in a sterile container) during a routine visit. The lab processes it to isolate DNA and viral genetic material for testing. No special preparation is needed, but avoid using laxatives or medications that may alter stool consistency.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Fecal DNA & Viral Testing

Frequently asked questions

How long will results take?
Results typically take 3–7 business days, depending on lab workload. Follow-up with your healthcare provider to discuss findings and next steps.
What if I have false-positive or false-negative results?
False positives or negatives are rare with this advanced molecular test, but your provider may repeat testing if initial results are uncertain. Confirmatory testing may be needed for complex cases.
Can I eat or drink before the test?
No special diet is required, but avoid using laxatives or supplements that could alter stool composition. Bring the sample to your appointment as instructed.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

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