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Nasal swab viral nucleic acid probe test (CMV DNA)

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

This test checks for the presence of cytomegalovirus (CMV) genetic material in your nasal swab sample. It helps determine if you may have been exposed to CMV or if the virus is active in your body.

Quick summary

["A CMV test can help guide treatment decisions if you're immunocompromised or pregnant."]

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

Key facts at a glance

LOINC
83065-3
Short code
CMV DNA Sal Ql NAA+probe
Synonyms
CMV DNA Sal 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 the Test Measures

The test detects CMV DNA, which is a fragment of the virus’s genetic material. If present, it suggests recent or ongoing infection. This probe method is highly sensitive for detecting even small amounts of viral DNA in your nasal swab.

How the Sample is Collected

A healthcare provider will collect a sample by swabbing the inside of your nose. This is a quick, painless procedure with no special preparation needed.

When You Might Need This Test

You may receive this test if you have symptoms like fever, fatigue, or swollen lymph nodes, especially if you’re immunocompromised (e.g., due to HIV, chemotherapy, or organ transplant). It’s also used in pregnant women to assess risk of congenital CMV infection.

What to Expect After the Test

Results are typically available within 24–48 hours. If positive, further testing (like blood or urine samples) may be needed to confirm active infection or guide treatment.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

CMV is a common virus that often causes mild illness in healthy people but can be serious in those with weakened immune systems. Early detection helps prevent complications, such as organ damage or severe illness, especially in high-risk groups.

Frequently asked questions

Why was I asked to take this test?
Your healthcare provider may have recommended this test if you have symptoms of infection, are at high risk for CMV (e.g., pregnant, immunocompromised), or are being monitored for exposure in a healthcare setting.
What does a positive result mean?
A positive result indicates the presence of CMV genetic material in your nasal swab, which may mean you’ve been recently exposed or have an active infection. Follow-up testing may be needed to confirm and guide next steps.
Do I need to do anything special before or after the test?
No special preparation is needed before the test. Afterward, you may have mild discomfort or irritation from the swab, but this usually resolves quickly. Avoid touching the swab area afterward to prevent contamination.
  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