Why is my titer low?

Thus, a person with a severe infection may test negative or have a low titer because of higher numbers of antigen-antibody complexes and lower numbers of free antibodies in the blood. In certain conditions, a low titer may essentially indicate the efficient removal of infectious pathogens by the immune system.

What is a normal measles titer?

0.8 AI or less: Negative – No significant level of detectable measles (rubeola) IgG antibody. 0.9-1.0 AI: Equivocal – Repeat testing in 10-14 days may be helpful. 1.1 AI or greater: Positive – IgG antibody to measles (rubeola) detected, which may indicate a current or past exposure/immunization to measles (rubeola).

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 is a measles antibody titer?

The MMR Titer is a blood test that checks if you are immune to Measles, Mumps and Rubella. It measures your antibody levels to get a sense for whether your immune system has the capability to respond to an infection with one of these diseases.

When do you get titers?

Once vaccinated, titers should not be drawn until 6-8 weeks after the vaccination. Why? If drawn too soon afterwards, the titers will indicate non-immunity as the vaccine will still be in your system.

What if my measles titer is negative?

If a healthcare worker has 2 documented doses of MMR vaccine and is tested serologically and determined to have negative or equivocal measles titer results, it is not recommended that the person receive an additional dose of MMR vaccine.

What lab test confirms measles?

The most common tests used for diagnosing measles are the measles antibody (IgM) test and the measles RNA real-time polymerase chain reaction (RT-PCR) test. Viral culture is an alternative method if PCR is not available.

How much is a titer test for MMR?


Immunizations, Titers and TB tests Cost per Shot
Hepatitis A Titer $37
Hepatitis B Titer $14
Varicella Titer $13
MMR Titer Measles/Mumps/Rubella $41 $13/$13/$15

What is a positive MMR titer?

A positive MMR titer means that you are considered immune and do not need to be revaccinated.