Fast Five Quiz: Allergic Asthma Presentation and Diagnosis

Zab Mosenifar, MD


September 11, 2019

It is estimated that the serum IgE level is only elevated in approximately half of patients with allergic asthma. Obtaining a serum IgE level through blood testing is not indicated for most patients suspected of having allergic asthma.

When blood testing is performed, IgE levels > 1000 ng/mL (1 IU = 2.4 ng) may suggest an alternate diagnosis, such as allergic bronchopulmonary aspergillosis. The presence of atopic dermatitis may also result in high IgE levels.

Learn more about laboratory tests for allergic asthma.


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