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DENGUE Elisa IgG

About the test
What is this test done for?
The dengue IgG test is a diagnostic test used for the detection of the dengue virus.
Why is it Done?
It is performed to help detect recent or current infection. IgG antibodies are produced more slowly in response to infection. Its levels rise in chronic infections and persist long term.
When should it be performed?

The test should be performed when someone has the following signs and symptoms and especially in persons travelling to tropical areas where the virus is prevalent:

  • Acute high fever 104O F
  • Headaches
  • Joint pain
  • Body pain
  • Low white blood cell count
  • Bleeding gums or nose
  • Tendency to bruise easily

It is done within 1 week of onset of symptoms.

How is it done
A blood sample will be collected from a vein in your arm. No special precautions like fasting are required.
Results
They are interpreted along with Dengue IgM results.
  • If the result of IgG is negative and IgM is positive, it indicates current infection.
  • If the result of IgG is positive and IgM is positive too, it indicates current infection.
  • If the result of IgG shows a fourfold increase and IgM is low or negative, it indicates recent infection.
  • If the result of IgG is positive and IgM is low or negative it indicates past infection.
  • If the result of IgG is negative and IgM is negative it indicates the phase soon after the initial exposure of antibodies.
Other Tests
CBC is very important as it helps confirm the diagnosis.
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