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Genomic DNA Detection in Plasma/Serum Using a Probe-Based Assay

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

This test measures the presence of specific genetic material (DNA) in your blood, often used to detect infections, genetic markers, or cellular activity.

Quick summary

["Assists in identifying potential infections, genetic conditions, or abnormal cell activity in your bloodstream."]

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

Key facts at a glance

LOINC
103162-4
Short code
EPEC DNA Wnd Ql NAA+probe
Synonyms
EPEC DNA Wnd Ql NAA+probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

This test detects the presence of a particular DNA sequence in your plasma or serum. The probe is designed to bind specifically to certain genetic fragments, helping identify conditions like infections (e.g., viruses), genetic mutations, or cellular changes that may indicate disease.

Why It Might Be Ordered

Your healthcare provider may order this test if you have symptoms suggestive of an infection, genetic disorder, or conditions involving abnormal cell proliferation (e.g., cancer monitoring). It can also be used in research or specialized diagnostic scenarios.

Sample Collection and Preparation

A blood sample is drawn, and the plasma or serum is separated from blood cells. The DNA is then extracted and analyzed using the probe-based method to detect specific genetic sequences.

Common Uses and Clinical Context

This test is primarily used in research, specialized diagnostics, or monitoring conditions where DNA presence is indicative of disease progression, such as certain infections or genetic testing for inherited conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

DNA Probe Test

Frequently asked questions

What does a positive result mean?
A positive result indicates the presence of the specific DNA sequence targeted by the probe. This could suggest an infection, genetic mutation, or abnormal cell activity, but interpretation depends on clinical context and additional testing.
Will I need to prepare for this test?
No special preparation is typically required, but you may be asked to fast or avoid certain medications depending on your specific test order. Follow your healthcare provider’s instructions.
How long will it take to get results?
Results may vary by lab and testing complexity. Some results are available within days, while others may take weeks, especially if additional testing or confirmatory analysis is needed.
  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