Skip to content

Cytomegalovirus Antibody Titration (Serum/Plasma)

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

This test measures the level of antibodies against cytomegalovirus (CMV), a common virus that can affect the immune system. It helps determine if your body has developed immunity to CMV or if you may have been exposed.

Quick summary

["Assesses immunity or past exposure to CMV via antibody detection."]

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

Key facts at a glance

LOINC
22241-4
Short code
CMV Ab Titr SerPl
Synonyms
CMV Ab Titr 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

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have a weakened immune system (e.g., due to HIV, chemotherapy, or organ transplant), are pregnant, or have symptoms like fever, fatigue, or swollen lymph nodes that could suggest CMV infection. It may also be used to monitor treatment responses in certain conditions.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. The test is quick and typically done in a lab setting. If you’re pregnant or have a bleeding disorder, let your provider know before the test.

What the Results Mean

Results show whether you have detectable antibodies against CMV. A positive result indicates past infection or immunity, while a negative result suggests no current immunity. Exact interpretation depends on clinical context, such as your medical history or symptoms.

Common Reasons for Testing

This test helps diagnose or rule out CMV infection, assess immune status before procedures (like organ transplants), or evaluate exposure risks in high-risk groups (e.g., pregnant individuals or immunocompromised patients).

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CMV Antibody Level

Frequently asked questions

How often should I get this test?
The frequency depends on your medical needs. If you’re immunocompromised or pregnant, your provider may recommend periodic testing to monitor CMV status. For general screening, it’s usually done once unless symptoms or risk factors change.
What does a low or high antibody level indicate?
A low antibody level may mean you lack immunity to CMV, increasing risk of infection. A high level suggests past exposure or immunity, but further testing may be needed to confirm active infection. Always discuss results with your healthcare provider.
Can I get CMV from this test?
No, the test involves only a blood sample and does not transmit viruses. Follow standard lab safety protocols to prevent contamination, and avoid sharing needles or personal items with others.
  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