of or relating to a vesicle or vesicles. 2. having the form of a vesicle. 3. characterized by or consisting of vesicles.
Types of Allergy Blood Tests. Allergy blood tests detect and measure the amount of allergen-specific antibodies in your blood. When you come into contact with an allergy trigger, known as an allergen, your body makes antibodies against it.llergy blood testing is recommended if you: 1  Are using a medicine known to interfere with test results and cannot stop taking it for a few days. 2  This would include antihistamines, steroids, and certain antidepressants.
Why It's Done. This test is performed to check for allergies to specific allergens. Doctors may order it when a child has symptoms of an allergy (include hives, itchy eyes or nose, sneezing, nasal congestion, throat tightness, or trouble breathing). Symptoms may be seasonal (as with allergies due to pollen or molds) or year-round (as with pet dander) and can range from mild to severe.