What sample is required?
The determination is made from a venous blood sample from the arm.
Is some kind of prior preparation necessary?
For this test you do not need any special preparation.
Why do the analysis?
To detect an allergy; sometimes to detect parasitic infections.
When to do the analysis?
When a person presents persistent signs or symptoms of a skin, respiratory or digestive type suggestive of allergy; when a parasitic infection is suspected.