Which of the following tests is used to determine whether a particular allergen is responsible for asthma?
A) measure wheal-and-flare diameter after intradermal injection of allergen
B) measure Arthus reaction diameter after intradermal injection of allergen
C) inject a controlled amount of allergen intradermally and observe urticaria
D) measure peak expiratory flow rate (PEFR) following inhalation of allergen
E) measure eosinophils in nasal secretions following inhalation of allergen.
Correct Answer:
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