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Cytomegalovirus (CMV) Antibody, IgG and IgM (Serum/Plasma)

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

This test checks for antibodies against cytomegalovirus (CMV), a common virus that can affect the immune system. It helps determine if your body has ever been exposed to CMV or if you currently have an active infection.

Quick summary

["CMV antibodies help track past or present infection, guiding treatment and monitoring for immunocompromised patients."]

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

Key facts at a glance

LOINC
5837-0
Short code
CMV Ur Ql Cult
Synonyms
CMV Ur Ql Cult
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
organism-specific-culture
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your doctor may order this test if you have symptoms like fever, fatigue, or organ issues that could be linked to CMV. It’s also used before organ transplants to check for prior exposure, especially if you’re at higher risk for infection.

What to Expect Before the Test

No special preparation is needed. A blood sample is drawn from a vein, usually in your arm. The process takes a few minutes, and you may feel slight discomfort.

What the Results Mean

Positive IgG antibodies suggest past exposure, while IgM antibodies indicate a recent infection. Both together can help diagnose active CMV or assess immune status.

Common Conditions Monitored

This test is critical for people with weakened immune systems (e.g., after chemotherapy, organ transplants, or HIV) to prevent severe CMV infections that could harm organs.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CMV Antibody Panel

Frequently asked questions

Will I need to fast before this test?
No fasting is required. Blood is drawn at any time of day.
What are the typical reference ranges for these antibodies?
Reference ranges vary by lab and aren’t standardized for antibody tests. Your doctor will interpret results based on your medical history and symptoms.
Can I get CMV from this test?
No, the test only detects antibodies—it does not transmit the virus. Blood samples are processed safely to prevent exposure.
  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