Full interactive module available — covers SPT/IDT technique, component-resolved diagnostics (CRD), oral food challenges, drug challenges, tryptase interpretation, methacholine bronchoprovocation, BAT, and immunoglobulin/vaccine titers.
Allergy testing is a diagnostic procedure used to identify specific allergens that trigger allergic reactions in patients, employing methods such as skin prick tests, intradermal tests, and serum-specific IgE measurements. Proper interpretation of allergy test results requires correlation with clinical history and symptoms, as positive tests don't always indicate clinical relevance.
Allergic reactions involve IgE-mediated Type I hypersensitivity responses where initial allergen exposure leads to sensitization and IgE antibody production by plasma cells. Upon re-exposure, allergens cross-link IgE antibodies bound to mast cells and basophils, triggering degranulation and release of inflammatory mediators like histamine, leukotrienes, and prostaglandins.
Allergy testing should be guided by detailed clinical history to select relevant allergens for testing, as broad panels often yield false positives that lack clinical significance. Results must be interpreted in conjunction with symptom patterns, timing of reactions, and exposure history, since sensitization (positive test) doesn't always correlate with clinical allergy requiring treatment or avoidance measures.