Chapter title |
Update on Type-1 Allergy Diagnostics
|
---|---|
Book title |
Allergic Diseases – From Basic Mechanisms to Comprehensive Management and Prevention
|
Published in |
Handbook of experimental pharmacology, June 2021
|
DOI | 10.1007/164_2021_487 |
Pubmed ID | |
Book ISBNs |
978-3-03-084047-1, 978-3-03-084048-8
|
Authors |
Treudler, Regina, Simon, Jan-Christoph |
Abstract |
Diagnostics in type-1 allergy rely on medical history and clinical examination. Extent and severity of signs and symptoms can be documented by standardized scores and questionnaires. Both skin prick test and intradermal test are useful for search of immunoglobulin E-mediated sensitizations but the availability of commercially available diagnostic extracts has been markedly reduced during the last years. Investigation of total and of specific serum IgE is the most important in vitro diagnostic analyte in type-1 allergy. Identification of the individual molecules to which patients are sensitized, known as molecular or component-resolved diagnostics (CRD), has recently markedly improved management of type-1 allergy to pollen, food and hymenoptera venoms. Main features of CRD are increased analytic sensitivity, detection of cross-reactivity and determination of individual sensitization profiles which allow for risk assessment and facilitate decisions for or against allergen immunotherapy. Basophil activation test as well as determination of selected biomarkers (e.g. tryptase) may also be helpful in some cases. If any allergy test is positive, one will have to distinguish reactions, which are clinically relevant, from those, which are not. In vivo provocation tests (e.g. nasal provocation, oral drug or food challenge) may help to clarify the relevance of a sensitization. |
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