Expected test values
Test results for ImmunoCAP Allergen Mixes are derived from multiple allergens and are reported as qualitative values (positive or negative). A cut-off value of 0.35 kUA/L is recommended for ImmunoCAP multiple allergens. Values between limit of quantification and 0.35 kUA/L may represent very low levels of IgE antibodies. Values ≥0.35 kUA/L indicate specific IgE antibodies to one or more of the allergens coupled to ImmunoCAP multiple allergen. Reinvestigation with appropriate ImmunoCAP single allergen is recommended when there is a need to further identify and obtain a quantitative result for the specific allergen(s). A value below 0.35 kUA/L indicates undetectable or very low levels of allergen specific IgE antibodies towards all of the allergens bound to ImmunoCAP multiple allergen but deviations from results obtained with single ImmunoCAP allergens may occur. The interpretation of results obtained with ImmunoCAP multiple allergen cannot be compared with the results with ImmunoCAP single allergen. The degree of positivity of ImmunoCAP multiple allergen cannot be considered the cumulative degree of positivity of the respective ImmunoCAP single allergen.
The presence of specific IgE antibodies is useful to identify the allergens that elicit symptoms and signs of allergy in patients with respiratory allergic diseases including asthma, food allergy, and anaphylactic sensitivity.
Knowing IgE antibody levels provides guidance to clinicians to:
Specific IgE testing also aids in the identification of patients at risk of:
As in all diagnostic testing, a definitive clinical diagnosis should be made by the clinician after evaluation of all clinical and laboratory findings.