Thelansis

  Birch belongs to the order Fagales and the family Betulaceae, which are widely distributed across the United States. Numerous species of birch trees can be found throughout the country, contributing to allergies. The European white birch (Betula pendula) and River birch (Betula nigra) are the two most prevalent varieties. Birch pollen is a significant allergen inhaled from the air, particularly in the northern temperate region. This pollen often leads to allergic rhinitis, asthma, and allergies to certain foods associated with pollen exposure. The prevalence of sensitivity to birch pollen is approximately 8-16% in the general population and ranges from 7-57% among patients attending various allergy clinics. The International Allergen Nomenclature Sub-committee has recognized seven allergens associated with birch pollen, with Bet v 1 being the primary allergen. To enhance diagnostic accuracy, component-resolved testing can differentiate broad cross-reactivity and prevent false-p...