Skip to content

Cytomegalovirus (CMV) DNA in Plasma/Serum (Quantitative)

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

This test measures the amount of cytomegalovirus (CMV) genetic material in your blood. It helps doctors track how your body is responding to infection or treatment.

Quick summary

["This test helps monitor CMV infection or recurrence during treatment."]

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

Key facts at a glance

LOINC
108220-5
Short code
CMV DNA CSF NAA+probe-Log#
Synonyms
CMV DNA CSF NAA+probe-Log#
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your doctor may order this test if you have a weakened immune system (such as from HIV/AIDS, chemotherapy, or organ transplant) and have been exposed to CMV. It’s also used to check if your treatment for CMV is working or if the virus is spreading in your body.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm to draw blood. If you’re on blood thinners, let your doctor know beforehand.

How the Results Are Interpreted

Results are typically reported as a count of CMV genetic material per unit of blood (e.g., copies/mL). Higher counts often mean active infection, while lower counts suggest the virus is under control.

Common Causes of Abnormal Results

Active CMV infection, treatment response, or possible relapse. Very high levels may indicate severe infection, while very low levels could mean the virus is suppressed by treatment.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is critical for managing CMV in immunocompromised patients. It helps doctors adjust treatments to prevent complications like organ damage or severe illness.

Short name

CMV DNA Viral Load

Frequently asked questions

Will this test hurt?
You may feel a slight pinch when the needle is inserted, but it usually doesn’t cause long-term discomfort. Most people tolerate blood draws well.
How long will I have to wait for results?
Results are typically available within 1–3 business days, depending on lab processing times.
Can I eat or drink before this test?
Yes, you can eat and drink normally before the test unless your doctor has specific instructions.
  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