Rubella Antibodies Blood Test, IgM

What is the purpose of this test?

Order this Rubella Antibodies Blood Test, IgM, to detect antibodies to rubella to diagnose a new or current infection. Rubella is a viral infection that typically begins with a skin rash and fever. Although rubella has been eliminated from the United States due to widespread immunization with the measles-mumps-rubella (MMR) vaccine, it can be spread by unvaccinated people who contract the virus abroad before returning to the United States.

Although rubella is usually a mild illness that goes away without treatment, it can have severe effects if transmitted to unvaccinated individuals or a developing fetus during pregnancy. As a result, often schools and certain companies require their students and workers to provide proof of immune status. In addition, healthcare providers may order a rubella antibody test as part of prenatal screening.

What is the difference between rubella IgM and IgG antibody tests?

IgM antibody testing is typically the first test used to diagnose rubella. Individuals who are newly infected with rubella develop IgM antibodies to the virus. Most individuals will develop IgM antibodies as soon as four days after the onset of symptoms. However, IgM antibody levels can remain detectable for six to eight weeks after infection.

IgG antibody testing is another type of antibody test that may be used to diagnose rubella and establish immunity. In addition, IgG testing is also the preferred method for checking immunity to rubella in pregnant women.

When should I order a Rubella Antibodies Blood Test, IgM?

Individuals may order this test if they have experienced symptoms related to rubella infection. Common signs or symptoms of a rubella infection may include:

• Fever
• Headaches
• Skin rash
• Sore throat
• Joint pain or stiffness
• Conjunctivitis (pink eye)

Individuals are advised to follow up with their doctor or healthcare provider if they have significant concerns or questions about their results.