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Serum or plasma concentration of DNA (qualitative or semiquantitative probe-based assay)

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

This test checks for the presence of DNA in your blood, which may help identify certain conditions or infections.

Quick summary

["Assists in detecting abnormal DNA levels that could signal underlying health concerns."]

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

Key facts at a glance

LOINC
63409-7
Short code
dsDNA Ab CSF Ql IF
Synonyms
dsDNA Ab CSF Ql IF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

What This Test Measures

DNA is a molecule found in all living cells. In this test, we analyze whether DNA is present in your blood, either in small amounts (qualitative) or with a measured concentration (if quantitative). This can be useful in diagnosing conditions like infections, autoimmune diseases, or certain cancers where DNA fragments may appear abnormally.

Why It Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like unexplained fevers, chronic infections, or if you’re being evaluated for conditions where DNA markers (e.g., viral DNA, cell-free DNA) are relevant. It can also be part of a broader diagnostic workup.

Common Uses in Medicine

Qualitative DNA testing in blood is sometimes used to detect viral infections (e.g., herpes, HIV) or to monitor conditions like autoimmune diseases where DNA fragments may indicate inflammation or tissue damage.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast or avoid certain medications. Bring a list of your current medications to your doctor’s office.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

DNA in Serum/Plasma (Qualitative)

Frequently asked questions

How might abnormal DNA levels affect my health?
Abnormal DNA detection could signal infections, autoimmune activity, or other systemic conditions. For example, high levels of viral DNA might indicate an active infection, while unusual patterns could warrant further testing for hidden health issues.
What if my results are positive?
Positive results may prompt additional testing to identify the cause. Your doctor will discuss next steps based on your symptoms and lab findings, such as specific viral testing or further bloodwork.
Can I eat or drink before this test?
Typically, no fasting is required for this test, but always follow your healthcare provider’s instructions. If you’re unsure, ask before your appointment.
  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