3 Day Measles test

Generally, this test is done to test for rubella or three-day measles (also known as German Measles). Anyone who needs to know about his/her immunity profile can take the test. It is specifically done to check the immunity profile of a pregnant woman against common illnesses. If the mother has fever and rash, then it is necessary to get this done in order to verify if the baby’s development is normal.

 Blood is collected from a vein of the mother or from the umbilical cord of the baby. This blood is later tested for antibodies.
The test determines the amount of rubella antibodies in the sample of blood taken. There are 2 types of antibodies-
  1. IgM
  2. IgG

IgM is a rubella antibody. It is the first to appear. The protein content in the body increases to maximum within 10 days after the infection and then it decreases over the next few weeks. IgG antibody appears later than the IgM antibody. But the difference in this antibody is that, once it appears in the body it stays there for the entire life span of the mother.

Purpose of the3 day mgerman measle test 

This test is done for 3 basic purposes

  • To check if there is adequate protection in the body against the rubella virus
  • To verify if there was a recent or a past infection and also identify those who are not vaccinated or contracted the virus before
  • To determine if the pregnant women has the correct amount of the antibody in her bloodstream to protect her from any complications of infection.

Results of the 3 day german measle test

In a person if there is no IgG rubella antibodies present in the bloodstream, it means that the person has never contracted the virus or has never been vaccinated. So he/she is not protected against rubella. If there is a presence of IgG and not of IgM antibody it means that the person has been exposed to the virus or has been vaccinated before against the rubella virus.

If in a newborn, IgM is present but not IgG, it means that it has an in-utero infection. And if there is presence of IgG and not IgM, it means that the baby has passive immunity for up to six months.

When a person has a false positive test for IgM antibody, another test should be conducted to interpret the result accurately. This is done by the health care giver prescribing a re-test, to check the baseline level of the antibody.  Again, after 15 to 20 days, the IgG test has to be conducted in order to detect the increase of antibodies in the person.

Thus, the 3 day measles test is crucial, in order to establish the level of immunity for anyone, man or woman and also for a pregnant woman and the unborn child.

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