Ash, mean

Authors: Prof. Dr. med. Peter Altmeyer, Prof. Dr. med. Martina Bacharach-Buhles

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Last updated on: 13.09.2021

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Ash pollen allergy; fraxinus excelsior

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Deciduous tree from the Oleaceae family. These include lilac, forsythia, privet, olive tree, true jasmine.

The dried leaves (ash leaves - Fraxini folium, see there) and the bark (ash bark - Fraxini cortex) of younger twigs are used phytotherapeutically.

General information
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The main allergen in the pollen is Fra e 1, which causes type I sensitization with allergic rhinitis, conjunctivitis or even allergic bronchial asthma. Allergic skin reactions as well as allergic wood dust asthma can be caused by wood dust. The ash pollen allergy can be confused with the birch pollen allergy because both trees have overlapping flowering periods (March-May/June; main flowering period: April). Allergy sufferers who react to ash pollen may develop cross-reactions to olive pollen during holidays (see also under pollen, tree pollen), as the major allergen of olive pollen Ole e1 has a high sequence analogy with that of ash.

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Distribution area over all of Europe, with the exception of northern Scandinavia and southern Spain. The altitude ranges from the plain to the mountains: in the German low mountain ranges up to 800 m, in the Alps up to 1350 m, in the Caucasus up to 1800 m.

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Ingredients of Cortex Fraxini: Coumaric acid derivatives such as fraxin, fraxinol, aesculin. Furthermore mannitol and tannins.

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Remember! The allergological importance of ash has been rather low so far. However, an increase in the sensitization rate can be assumed.

Outgoing links (4)

Birch; Fraxini cortex; Fraxini folium; Pollen;