Molecular diagnostics of allergy gives more precious insight into IgE sensitization in comparison to the extract-based diagnostics. Positivity to molecules which are so-called markers of species specificity is important for the optimal assessment of allergens relevant for the patient, including indication of allergen-specific immunotherapy.
In the frame of inhalant allergens, the most important molecules are Phl p 1 and Phl p 5 for grass pollen, Bet v 1 for birch pollen, Der p 1 and Der p 2 for house dust mites, Alt a 1 for Alternaria, Fel d 1 for cat, Can f 5 for dog etc.