Immunoglobulin E: Normal, High

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Immunoglobulin E (IgE) are antibodies made by the immune system to fight against an allergy. And, Immunoglobulin E test measures the IgE level in the blood, so as to diagnose allergic disease, parasitic infection and other disorders.

Reference Range:

  • 0-5 months: ≤13 kU/L
  • 6-11 months: ≤34 kU/L
  • 1 and 2 years: ≤97 kU/L
  • 3 years: ≤199 kU/L
  • 4-6 years: ≤307 kU/L
  • 7 and 8 years: ≤403 kU/L
  • 9-12 years: ≤696 kU/L
  • 13-15 years: ≤629 kU/L
  • 16 and 17 years: ≤537 kU/L
  • 18 years and older: ≤214 kU/L

Interpretations:

  • A normal IgE level indicates that the person is likely to have no allergies. But it’s not diagnostic.
  • A high/increased IgE level suggests that the person probably has one or more allergies. For instance, if the person is allergic to some substance(s), then both the specific IgE and total IgE will increase during the time when the substance(s) is/are present.
  • More specifically, a persistently elevated IgE level tells that the person is often around the substance he/she is allergic to.
  • In addition, the more substances the person is allergic to, the higher the total IgE level.

 

Keywords: Immunoglobulin E; Quantitative IgE; Total IgE

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