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Viral Nucleic Acid Detection in Blood by Probe-Based Assay

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

This test checks for genetic material from certain viruses in your blood using a specialized DNA/RNA probe method. It helps identify infections that may not yet show symptoms.

Quick summary

["Detects viral genetic material quickly to guide treatment decisions."]

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

Key facts at a glance

LOINC
36923-1
Short code
EBV DNA # Bld NAA+probe
Synonyms
EBV DNA # Bld NAA+probe
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What This Test Measures

The test looks for specific sequences of viral DNA or RNA in your blood sample. These sequences come from viruses like those that cause hepatitis, herpes, or other infections. The probe method amplifies and identifies these sequences if present, even in small amounts.

Why It’s Done

Your healthcare provider may order this test if you have symptoms of infection (e.g., fever, fatigue) or risk factors (e.g., recent exposure, weakened immune system). It can also help confirm or rule out viral infections before other tests show results.

How It Works

A small blood sample is taken, and the viral genetic material is extracted. The probe binds to matching viral sequences, allowing detection even in low concentrations. This method is highly sensitive for early infection detection.

Sample Collection

Blood is drawn from a vein, usually in your arm. You may feel a brief pinch, but it’s quick and painless. The sample is processed immediately to preserve viral material for testing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Viral DNA/RNA Probe Test

Frequently asked questions

How long does it take to get results from this test?
Results are typically available within 24 to 48 hours, depending on lab processing times. Your healthcare provider will discuss next steps based on the outcome.
Can this test detect all viruses?
No, this test specifically targets viruses for which probes are designed. It may not detect all possible viruses, so your provider will confirm which viruses are being checked based on your symptoms or risk factors.
Is there any risk or discomfort with this blood test?
The blood draw is minor and involves a small needle. Most people experience only mild discomfort or bruising afterward. If you have a bleeding disorder or are on blood thinners, let your provider know before the test.
  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