A 16-Year-Old Girl Develops Shortness of Breath,runny Nose,wheezing,and Chest Tightening

Multiple Choice

A 16-year-old girl develops shortness of breath,runny nose,wheezing,and chest tightening with no fever.A spirometry test is performed and reveals that her FEV₁ is reduced and the ratio of FEV₁ to FVC is abnormal.Her FEV₁ improves by 15% after bronchodilator use.A chest radiograph is also obtained.The family mentions that they purchased a cat several weeks ago.You suspect allergic asthma. Increased levels of what type of serum antibody would you like to see to confirm your diagnosis?

A) Immunoglobulin A (IgA)
B) IgG
C) IgM
D) IgE
E) IgD