, Volume 8, Issue 2, pp 231-236

Long-distance transport ofBetula pollen grains and allergic symptoms

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An example of the potential importance of air masses as carriers of aero-allergens from distant source areas is provided. Considerable amount ofBetula pollen is relatively often transported to Fennoscandia before the local birch flowering period, mainly by southeastern air masses from eastern part of central Europe. Although the distance and the transport time in some cases can be extensive, the pollen grains seem to cause allergic reactions among sensitive persons.

A comparison between the clinical results andBetula pollen counts from the time before the local flowering season in Stockholm in 1989 is presented.