Measles Antibody (IgG)

The Measles Antibody (IgG) test contains 1 test with 1 biomarker .

Brief Description: The Measles Antibody IgG test is a blood test designed to detect the presence of IgG antibodies specific to the measles virus (rubeola). IgG antibodies are produced by the immune system in response to a measles infection or vaccination and provide long-term immunity. This test is used to determine whether an individual has been previously exposed to the measles virus or has developed immunity through vaccination. It is a valuable tool for assessing immune status, particularly in individuals who may be at risk of contracting or spreading the virus.

Also Known As: Rubeola Test, Measles Virus Test, Measles Titer test

Collection Method: Blood Draw 
Specimen Type: Serum 

Test Preparation: No preparation required

When is a Measles Antibody IgG test ordered?

The Measles Antibody IgG test is typically ordered in several scenarios. It may be requested for individuals who are unsure of their vaccination history or who have not been vaccinated against measles. Healthcare providers may also order the test for people who have been exposed to measles and need to confirm their immune status. Additionally, the test is often used in outbreak settings to identify susceptible individuals who may require vaccination. It is also commonly ordered for healthcare workers, international travelers, and students entering college, as these groups are at higher risk of exposure and may need proof of immunity.

What does a a Measles Antibody IgG blood test check for?

The Measles Antibody IgG test checks for the presence of IgG antibodies against the measles virus in the blood. These antibodies indicate either a past measles infection or a successful immune response to the measles vaccine. IgG antibodies typically appear several weeks after infection or vaccination and remain in the body for life, providing long-term protection against the virus. The test does not detect IgM antibodies, which are produced during an active or recent measles infection. Instead, it focuses on IgG antibodies to assess immunity.

Sample Ulta Lab Tests view of Measles IgG Antibody Results

Sample Quest Result Report view of Measles IgG Antibody Results

Lab tests often ordered with a Measles Antibody IgG test:

• When a Measles IgG Antibody test is ordered, it's often part of a broader evaluation of immune status or in response to a suspected measles infection or exposure. Here are some tests commonly ordered alongside it:

• Measles IgM Antibody Test:

  • Purpose: To detect recent or active measles infection.
  • Why Is It Ordered: IgM antibodies are typically the first to respond to an infection. If someone has symptoms of measles or recent exposure, the IgM test can help confirm an active or recent infection.

• Rubella IgG and IgM Antibody Tests:

  • Purpose: To assess immunity to rubella, another viral infection with symptoms similar to measles.
  • Why Is It Ordered: To ensure immunity to rubella, especially in pregnant women, as rubella can cause serious birth defects if contracted during pregnancy.

• Mumps IgG Tests:

  • Purpose: To determine immunity to mumps.
  • Why Is It Ordered: Mumps, like measles and rubella, is a common childhood illness, and immunity to it is often assessed alongside measles and rubella as part of a comprehensive evaluation.

• Varicella-Zoster Virus (VZV) Antibody Tests:

  • Purpose: To check for immunity to chickenpox and shingles.
  • Why Is It Ordered: Varicella-zoster virus can cause diseases with rash and fever, similar to measles. Determining immunity is especially important in healthcare settings and for certain travel vaccinations.

• Complete Blood Count (CBC):

  • Purpose: Provides a broad picture of overall blood health.
  • Why Is It Ordered: To detect signs of infection or abnormalities in the blood that may be associated with a viral infection like measles.

• Liver Function Test:

  • Purpose: To assess liver health.
  • Why Is It Ordered: Measles can affect the liver, so liver enzymes may be checked, especially if there are symptoms indicating liver involvement.

• Other Immunization Titers:

  • Purpose: To assess immunity to other vaccine-preventable diseases.
  • Why Is It Ordered: In certain cases, such as for healthcare workers or before traveling, it may be necessary to assess overall vaccination status and immunity to various diseases.

• These tests, when ordered alongside a Measles IgG Antibody test, provide a comprehensive view of an individual’s immune status and help in diagnosing current or past infections, assessing vaccine-induced immunity, and making decisions about future vaccinations or other preventive measures. The specific combination of tests will depend on the individual’s health history, potential exposures, and vaccination status.

Conditions where a Measles Antibody IgG test is recommended:

The Measles Antibody IgG test may be recommended in several situations. For individuals who are unsure of their vaccination status or who have not received the measles-mumps-rubella (MMR) vaccine, the test can confirm whether they are immune to measles. It is also recommended for people who have been exposed to measles and need to determine their risk of infection. In outbreak settings, the test helps identify individuals who are susceptible to measles and may require vaccination to prevent further spread. Healthcare workers, international travelers, and students are often tested to ensure they are protected against measles, as they are more likely to encounter the virus.

How does my health care provider use a Measles Antibody IgG test?

A healthcare provider uses the results of the Measles Antibody IgG test to assess an individual’s immune status and guide decisions about vaccination or other preventive measures. A positive result indicates the presence of IgG antibodies, suggesting immunity to measles due to prior infection or vaccination. In this case, no further action is typically needed. A negative result indicates the absence of IgG antibodies, meaning the individual is not immune and may be at risk of contracting measles. In such cases, the provider may recommend vaccination, especially if the individual is at high risk of exposure. For individuals with uncertain results, repeat testing or additional evaluation may be necessary.

What do my Measles IgG Antibody test results mean?

The results of the Measles Antibody IgG test can have several interpretations. A positive result means that IgG antibodies to measles were detected, indicating immunity to the virus. This immunity could be due to a past measles infection or successful vaccination. A negative result means that no IgG antibodies were detected, suggesting the individual is not immune and may be susceptible to measles. In some cases, a negative result could also occur if the test was performed too soon after exposure or vaccination, before the immune system had time to produce detectable antibodies. If there is a strong clinical suspicion of measles despite a negative IgG result, additional testing for IgM antibodies or viral RNA may be necessary to confirm an active infection.

The Measles Antibody IgG test is a crucial tool for assessing immunity to the measles virus. By detecting IgG antibodies, this test helps determine whether an individual is protected against measles due to prior infection or vaccination. It is particularly valuable for individuals with uncertain vaccination histories, those at high risk of exposure, and in outbreak settings. If you are unsure of your immune status or have been exposed to measles, consult your healthcare provider to determine whether this test is appropriate for you. Ensuring immunity to measles not only protects your health but also helps prevent the spread of this highly contagious virus in the community.

We advise having your results reviewed by a licensed medical healthcare professional for proper interpretation of your results.