Key pollen allergens in North America

Area of Science:

• Environmental Allergy and Immunology
• Aerobiology and Pollen Analysis
• Immunotherapy and Allergen Standardization

Background:

• Pollen aeroallergens are significant triggers for allergic respiratory diseases in North America.
• Effective immunotherapy relies on accurate identification and standardization of allergenic pollens.
• Current allergen extracts vary, impacting treatment consistency and patient care.

Purpose of the Study:

• To identify major North American pollen aeroallergens critical for immunotherapy.
• To propose a prioritized list of pollen aeroallergens for standardization.
• To enhance the development of standardized commercial allergen extracts.

Main Methods:

• Comprehensive literature search of PubMed without date restrictions.
• Keywords included allergy, aeroallergen, taxonomy, cross-reactivity, and specific pollen genera/species.
• Analysis focused on allergenicity and cross-reactivity patterns of common North American pollens.

Main Results:

• Tree allergens are relatively unique; selection at the genus or family level is recommended.
• Within the Composite family, one *Ambrosia* species suffices due to cross-reactivity.
• For grasses, timothy grass plus a northern grass species offers adequate coverage in northeastern North America.

Conclusions:

• Standardized commercial allergen extracts are a key goal for the allergy field.
• Standardization improves uniformity of patient care and facilitates inter-practice care transfer.
• A prioritized list aids in developing geographically specific and reliable allergen extracts.