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Viral DNA in Cerebrospinal Fluid (CSF) by Nucleic Acid Amplification Probe

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

This test detects genetic material from certain viruses in your spinal fluid. It helps identify infections like meningitis or encephalitis caused by viruses such as herpes, enterovirus, or others.

Quick summary

["This test can help diagnose viral infections in the brain and spinal cord."]

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

Key facts at a glance

LOINC
88536-8
Short code
VZV DNA Aspirate Ql NAA+probe
Synonyms
VZV DNA Aspirate 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 Does This Test Measure?

The test looks for specific viral DNA fragments in your cerebrospinal fluid (CSF). If these fragments are present, it suggests an active viral infection in the central nervous system.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms like severe headache, neck stiffness, fever, confusion, or neurological issues that could indicate a viral infection of the brain or spinal cord.

How Is the Sample Collected?

A small amount of cerebrospinal fluid is collected through a procedure called a lumbar puncture (spinal tap). A needle is inserted into your lower back to draw the fluid into a sterile container.

What Are Possible Results?

Positive results indicate the presence of viral DNA, suggesting a viral infection. Negative results mean no detectable viral DNA was found in the sample. Results may also be inconclusive if the sample is insufficient or if the test is not sensitive enough for your condition.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is crucial for diagnosing viral meningitis or encephalitis, which can cause serious neurological symptoms. Early identification allows for prompt treatment, which can reduce complications and improve outcomes. It helps differentiate viral from bacterial infections, guiding appropriate medical care.

Short name

CSF Viral DNA Probe

Frequently asked questions

What are the common symptoms that might lead to this test?
Common symptoms that might prompt this test include severe headache, neck stiffness, fever, confusion, seizures, or other neurological symptoms like muscle weakness or vision changes.
How long does it take to get the results of this test?
Results are typically available within 24 to 48 hours, depending on the laboratory’s processing time and any additional confirmatory steps needed.
Is there any preparation needed before this test?
No special preparation is required for this test. You may need to stay still during the procedure to ensure accurate results, but you can eat and drink normally beforehand.
  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