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Cytomegalovirus (CMV) Genomic Mutation Detection (Serum/Plasma)

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

This test checks for specific genetic mutations in your body’s cells that are linked to cytomegalovirus (CMV), a common virus that can affect immune systems, especially in people with weakened defenses.

Quick summary

["Helps assess risk for CMV-related complications, including infections in transplant recipients or those with HIV/AIDS."]

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

Key facts at a glance

LOINC
40444-2
Short code
CMV gene Mut Det Islt
Synonyms
CMV gene Mut Det Islt
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 This Test Measures

The test looks for mutations in the CMV genome using a blood sample (serum or plasma). These mutations can indicate whether you have a higher risk of developing CMV infection or reactivation, depending on your immune status.

Why It Might Be Ordered

Your healthcare provider may recommend this test if you’re undergoing organ transplantation, have HIV/AIDS, or have a condition that weakens your immune system. It can also be used before certain treatments to monitor viral load or susceptibility.

Sample Collection and Preparation

A small blood sample is drawn from your arm. The serum or plasma is then analyzed in a lab to detect specific genetic changes in CMV DNA.

What to Expect Before the Test

No special preparation is needed, but inform your doctor about any medications (especially immunosuppressants) or recent illnesses that could affect results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test helps identify genetic variations in CMV that may influence infection risk or treatment response. For example, certain mutations could signal a higher likelihood of severe disease in immunocompromised individuals, guiding personalized medical decisions.

Short name

CMV Mutation Screen

Frequently asked questions

Will this test show if I already have CMV?
No, this test specifically detects genetic mutations in CMV DNA, not active infection. If you have symptoms of CMV (e.g., fever, fatigue), you may need additional tests like viral load or antibody checks.
Can results change over time?
Yes, results can vary depending on immune status, treatment, or progression of underlying conditions. Follow-up testing may be needed if your doctor suspects changes in viral behavior.
Does this test require fasting?
No fasting is required, but avoid alcohol or certain medications (like blood thinners) for 24 hours before the blood draw if instructed by your provider.
  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