ABSTRACT
Tree pollen is a relevant source of outdoor allergens responsible for sensitization and allergy symptoms in genetically predisposed individuals in different areas of the world. The diversity of tree families, genera, and species vary depending on geography. Most trees are wind-pollinated and release large amounts of pollen into the air. Proper understanding about cross-reactivity among pollen from different taxonomic groups and the edible products they produce are relevant parameters to select the most appropriate extracts for diagnosis and specific immunotherapy. The production of recombinant tree allergens is evolving in Europe but not in other areas of the world. This chapter discusses the potential advantages that the use of recombinant tree allergens may have in medical practice. It is theoretically feasible to diagnose and treat patients sensitized to tree pollen using recombinant allergens. However, this strategy is for the future.
