What is an ImmunoCAP?

ImmunoCAP™ tests provide an objective measurement of the circulating allergen-specific IgE antibodies. Specific IgE antibodies appear as a result of exposure and following sensitization to an allergen.

How do you read RAST test results?

Each allergen has its own reference value which the lab will interpret individually. Most labs will report the RAST findings on a scale of 0 to 5 or more. A 0 value suggests a low likelihood of an allergy. Values at the upper end are indicative of a higher likelihood of an allergy.

What diseases have high IgE?

Elevated levels of total serum IgE are associated with many diseases, including allergic bronchopulmonary aspergillosis (ABPA), parasitosis, atopic dermatitis, adult HIV infection, hyper-IgE (Job’s) syndrome, Sézary’s syndrome, IgE myeloma, and Kimura’s disease[1].

What is a predictive IgE level in Rast?

Different foods have specific IgE levels that are considered “predictive” in the RAST test. Researchers can determine this by conducting research in which they compare IgE concentrations to a reactive allergic response in a food challenge.

Are ImmunoCAP Specific IgE blood test results quantitative or qualitative?

ImmunoCAP Specific IgE blood test results are quantitative. Results above 0.1 kUA/l are indicative of an allergen-specific IgE sensitization.1Total IgE reference ranges are dependent on age. You must use your lab’s reference range for Total IgE located on the results.

Is high IgE level associated with lower cancer rate?

Although it usually signals an undesirable event, high IgE may be associated with lower cancer rate. A meta-analysis of eight clinical trials (over 6,000 people) found significantly lower rates of brain tumors in people with high total IgE [ 78 ].

Can a RAST test predict how I will respond to allergens?

While a RAST test can detect the concentration of IgE antibodies in your blood, it cannot predict how you will respond to the allergen it is associated with.