Cytomegalovirus (CMV) Antibody, IgM in Serum/Plasma
This test measures the presence of Immunoglobulin M (IgM) antibodies against cytomegalovirus (CMV), a common virus that can affect people of all ages. IgM antibodies are typically produced shortly after infection.
["IgM antibodies to CMV can help identify recent infection, but they may not be present long-term."]
Key facts at a glance
- LOINC
- 111269-7
- Short code
- CMV DNA Msmt SerPl
- Synonyms
- CMV DNA Msmt SerPl
- 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 Does This Test Measure?
This test detects IgM antibodies specific to CMV, which are produced by your immune system in response to a recent infection. IgM is the first type of antibody your body makes after exposure to a virus like CMV. It usually appears within a few weeks after infection and can stay in your system for months or longer, depending on your immune response.
Why Might You Need This Test?
Your healthcare provider may order this test if you have symptoms of CMV infection, such as fever, fatigue, or organ-specific issues (like vision problems in the eyes or kidney problems). It may also be used during pregnancy to check for CMV exposure, especially if you or your partner have been exposed to the virus.
What to Expect Before the Test
No special preparation is needed for this test. You’ll have a small needle inserted into your arm or hand to draw a blood sample. The process is quick and usually painless. If you’re pregnant or have a history of bleeding disorders, let your healthcare provider know before the test.
What to Expect After the Test
After the blood is drawn, you may feel a small bruise or slight discomfort at the site. Apply pressure to stop any bleeding. You can return to your normal activities immediately. If you experience excessive bleeding, swelling, or signs of infection (like redness or fever), contact your healthcare provider.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
CMV IgM Antibody
Frequently asked questions
Why is this test important?
FAQ: How long does it take to get results?
FAQ: Can I have false-positive or false-negative 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