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Tests for specific diseases - Asthma

Asthma allergies

Some people have asthma attacks that are triggered by allergies. Identifying these allergies can help asthma patients avoid them to reduce triggering attacks.

A radioallergosorbent test (RAST) checks the blood levels of antibodies to common allergens.
A skin prick test injects small amounts of allergens under the skin to detect a skin reaction to any of the allergens.
Some patients can have asthma treatments to block these antibodies which helps to control the disease and reduce frequency of attacks.

Eosinophils

Some patients with asthma have elevated eosinophils (a white cell detected in a full blood count). This may reflect the patients allergic status.
Certain asthma treatments target eosinophils which can help to control asthma.