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Aerobiologia

, Volume 23, Issue 2, pp 119–129 | Cite as

Indoor and outdoor pollen concentrations in private and public spaces during the Betula pollen season

  • Timo HuggEmail author
  • Auli Rantio-Lehtimäki
Original Paper

Abstract

Although the number of studies of pollen concentrations inside and outside buildings is increasing, little is known about the efficiency of penetration of pollen from outdoor to indoor air, and further. We studied indoor and outdoor pollen concentrations in the town of Lappeenranta and in the municipality of Rautjärvi in SE Finland from May 3–23, 2004, i.e. throughout the Betula pollen season, and assessed the risk of exposure to pollen grains. Pollen concentrations were measured inside and outside a block of flats, a detached house, and the regional central hospital, using rotorod-type samplers; in the town of Joutseno data were compared with Burkard counts. Outdoor concentrations of Betula pollen grains ranged between low and abundant (0–855 grains m−3). The corresponding indoor concentrations near the main front doors varied from low to moderate (0–17 grains m−3) in the central hospital and were low (<10 grains m−3) in both residential buildings. Indoor concentrations further from the main front door were low (<10 grains m−3) at all study sites. The concentrations of Betula pollen decreased substantially from outdoors to indoors, and further toward the centre of the building, probably indicating relatively poor penetrating properties of the pollen grains and/or the short-lived presence of pollen grains in indoor air. The concentrations of Betula pollen inside the buildings during the peak flowering period were mostly at a level barely inducing reactions even in the most sensitive persons.

Keywords

Betula Exposure Indoor air Outdoor air Pollen grain Rotorod sampler 

Abbreviations

rpm

Rotations per minute

I/O

Indoor/outdoor

SD

Standard deviation

Notes

Acknowledgements

We thank Professor Jouni Jaakkola and Dr Kimmo Saarinen for their comments on the earlier draft and Dr Juha Jantunen for technical assistance with illustration.

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  1. 1.South Karelia Allergy and Environment InstituteJoutsenoFinland
  2. 2.Department of BiologyUniversity of TurkuTurkuFinland

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