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[Allergologic-immunochemical study of tree and bush pollen. III--Cross reactions of human IgE antibodies with various tree pollen allergens].

Partial identity between the major allergens of birch, beech, alder, hazel and oak pollen extract could be identified by means of RAST-, ELISA- and CRIE-inhibition as well as further types of crossed immunoelectrophoresis. It seems that spring time pollinosis in our region of Central Europe is caused principally by the major allergen of birch pollen. Cross reactivity between grass and tree pollen could not be found. Patients with symptoms in spring and summer time are double sensitized.