: Measles Virus IgG Antibody Titer, Serum
: This test measures the level of IgG antibodies against measles virus in a blood (serum) sample, which helps show whether you have immunity from past infection or vaccination.
[": A positive measles IgG result generally indicates prior exposure or vaccination and likely immunity, while a negative result suggests you may not be protected."]
Key facts at a glance
- LOINC
- 23755-2
- Short code
- M synoviae Ab Titr Ser HA
- Synonyms
- M synoviae Ab Titr Ser HA
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ha
- 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 detects immunoglobulin G (IgG) antibodies your immune system makes in response to the measles virus. IgG antibodies typically appear after infection or vaccination and can persist for many years, serving as a marker of immune memory.
: Why It Is Ordered
: Healthcare providers may order this test to check whether you are immune to measles, especially before travel, during employment screening for healthcare roles, or when evaluating a suspected past infection. It can also support public health investigations.
: How the Sample Is Collected
: A small blood sample is drawn from a vein in your arm and sent to the laboratory, where the serum is separated and tested for measles-specific IgG antibodies. No special preparation is usually required.
: Understanding Your Results
: Results are typically reported as positive, negative, or equivocal (indeterminate). A positive result generally suggests immunity, a negative result suggests lack of detectable immunity, and an equivocal result may require repeat testing or additional evaluation. Your provider will interpret results in the context of your vaccination and exposure history.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
: Measles IgG testing is valuable for confirming immune status and guiding decisions about vaccination or exposure management. Because results depend on individual history and laboratory methods, they should always be interpreted by a healthcare provider rather than acted on alone.
Short name
: Measles IgG
Frequently asked questions
: Does a positive result mean I am fully protected from measles?
: Can the test tell me whether I had measles recently?
: Do I need this test if I was vaccinated as a child?
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