Component

  Level (KU/L) 

     Peanut IgE,
complete (f13)

6.88

     Ara h 1

0.68

     Ara h 2

3.65

     Ara h 3

0.12

     Ara h 8

<0.10

     Ara h 9

<0.10

Table 2. Peanut component test results. Component testing sheds light on equivocal cases where whole-extract testing reveals relatively low levels of IgE. This patient was primarily sensitized to Ara h 2, a storage protein associated with a high risk of clinical symptoms.