Cytomegalovirus (CMV) IgG Antibody, Serum (Quantitative)
This test measures the presence of antibodies against cytomegalovirus (CMV), a common virus that can affect the immune system. Antibodies indicate past or current infection.
["This test helps determine if you’ve been exposed to CMV or if your immune system has developed immunity."]
Key facts at a glance
- LOINC
- 88623-4
- Short code
- CMV CSF Ql Cult
- Synonyms
- CMV CSF Ql Cult
- Category
- chemistry
- Sample
- csf
- Container
- Sterile tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- organism-specific-culture
- 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
Doctors may order this test to check for past CMV infection in people with weakened immune systems, such as those with HIV/AIDS, organ transplant recipients, or those undergoing chemotherapy. It can also help evaluate immune function or diagnose certain conditions like congenital CMV in newborns.
What to Expect Before the Test
No special preparation is needed. You’ll have a small needle inserted into your arm to draw blood. The process usually takes a few minutes. If you’re pregnant or have a history of bleeding disorders, let your doctor know before the test.
What the Test Results Mean
Positive results suggest you’ve had CMV at some point, meaning your immune system has produced antibodies to fight it. Negative results indicate no detectable antibodies, which may mean you’ve never been exposed or the test was taken too early after exposure.
Common Reasons for Testing
This test is often used in high-risk groups to monitor immune health, assess exposure risk, or diagnose conditions linked to CMV, such as organ rejection after transplant or severe infections in immunocompromised patients.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
CMV is a virus that can cause serious health issues in people with weakened immune systems. Detecting CMV antibodies helps doctors assess immune status, guide treatment decisions, and prevent complications like organ damage or severe infections. In pregnant women, it may also help identify potential risks to the fetus.
Short name
CMV IgG Antibody
Frequently asked questions
What does a positive result mean?
Can this test detect active CMV infection?
How long does it take to get results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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