Rubella Blood Test: Due to a rubella vaccination or a recent/past rubella infection, the body generates antibodies, which remain in the blood stream. This test helps detect and measure these antibodies that were created by the immune system. Based on this information it can be determined, if the body can successfully resist a rubella virus attack, in the future.
Due to a lifelong immunity, rubella infection generally occurs only once in those individuals, who were never vaccinated. Individuals vaccinated against rubella do not usually get a rubella infection. A negative result occurs due to the absence of antibodies against rubella and it helps identify individuals needing rubella vaccination.
The tests recommended, also depend on an analysis of the clinical scenario by the healthcare provider.Individuals in the following category should get tested for either IgM antibodies, IgG antibodies, or in some cases, for both IgM and IgG antibody:
Sample required: Blood
Process: Insertion of needle into a vein (arm), or by pricking an infant’s heel, or blood taken from a neonate’s umbilical cord.
Preparation required: None
Negative test for IgG antibodies against rubella implies:
Positive test for IgM antibodies against rubella implies:
The laboratory test results are NOT to be interpreted as results of a "stand-alone" test. The test results have to be interpreted after correlating with suitable clinical findings and additional supplemental tests/information. Your healthcare providers will explain the meaning of your tests results, based on the overall clinical scenario.
IgM & IgG: Both are antibodies belonging to protein immunoglobulin (Ig) class. While IgM (short-term) are produced immediately when the virus attacks the body, IgG (lifelong) are produced much later. Thus, the presence of these antibodies gives an indication of the period of infection.
Certain medications that you may be currently taking may influence the outcome of the test. Hence, it is important to inform your healthcare provider, the complete list of medications (including any herbal supplements) you are currently taking. This will help the healthcare provider interpret your test results more accurately and avoid unnecessary chances of a misdiagnosis.
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