Are measles titers accurate?

Titers may not be totally accurate: The titer test was developed based on the level of measles antibodies in the blood of patients who’d been exposed to measles naturally—by being exposed to the disease itself.

What does not immune to measles mean?

When measles or mumps IgG antibodies are present in a person who has been vaccinated and/or is not currently ill, then that person is protected against infection (immune). If a person does not have measles or mumps IgG antibodies, then that person is not considered immune to the viruses.

Can titers be wrong?

In general, you should wait six to eight weeks after completing the appropriate vaccination regimen to have a titer drawn. Having a titer drawn too early may result in a false negative since you’ll still be in the process of developing antibodies.

What is a good antibody titer?

The antibody titer score is generated by the number of times the scientist can dilute a patient’s serum and still be able to detect the presence of antibodies. Titers of 1:80 and 1:160 were categorized as low titers; 1:320 moderate; and 1:960 or ≥ 1:2880 were high.

What does positive measles antibody mean?

The presence of detectable IgG-class antibodies indicates prior exposure to the measles virus through infection or immunization. Individuals testing positive are considered immune to measles infection.

Does measles show up in a blood test?

If necessary, a blood test can confirm whether the rash is truly measles. The measles virus can also be confirmed with a test that generally uses a throat swab or urine sample.

What does measles IgG negative mean?

Laboratory evidence of immunity is based on testing to detect measles IgG. People who have negative or equivocal results for measles IgG should be vaccinated or revaccinated.

What does it mean if you have rubella antibodies?

The presence of IgM rubella antibodies in the blood indicates a recent infection while the presence of IgG antibodies may indicate a recent or past rubella infection, or indicate that a rubella vaccine (a measles, mumps, rubella vaccine) has been given and is providing adequate protection.

What does a positive measles titer mean?

Use. Aid in the determination of serological status to measles, mumps, and rubella viruses. A positive result generally indicates exposure to virus or previous vaccination. A positive result is considered adequate laboratory evidence of immunity.