A 17-year old male complains of recurrent episodes of cough, wheezing and shoness of breath paicularly at night for the last 3 days. His sibling has a history of similar symptoms. A Skin test with pollen produces immediate wheal and flare. The laboratory finding most consistent with his clinical findings would be
Correct Answer: Eosinophilia
Description: Atopy is the major risk factor for asthma.Patients with asthma commonly suffer from other atopic diseases,paicularly allergic rhinitis and atopic dermatitis.Eosinophilic infiltration of airways along with peripheral eosinophilia is a characteristic feature seen in asthmatic patients.There will also be elevated total serum IgE and specific IgE to inhaled allergens(radioallergosorbent test) in atopic asthma. Ref:Harrison's medicine-18th edition,page no:2109.
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