Abstract
The aim of the study was to analyse the grass pollen season dynamics in Wrocław in 2003-2010. The studies were carried out using volumetric method (Burkard trap). Special attentions was paid to differences in pollen season duration and patterns. The pollen season started on average on the 130th day of the year (±10 days) and ended on the 240<sup>th</sup> (±11 days). Peak of pollen seasons occurred between 156<sup>th</sup> and 185<sup>th</sup> day of the year. The mean of SPI value was 2805 (±380). On average, 18 days (±4 days) with a grass pollen concentration of more than 50 grains × m<sup>-3</sup>, and 2 days (±1 day) with concentration of more than 120 grains × m<sup>-3</sup> were recorded during the seasons analysed. Three types of pollen seasons were distinguished on the basis of cluster analysis (the non-hierarchical method of multifeature clustering - the k-means method).
Highlights
The Poaceae family is one of the most abundant families among different species of the Polish flora
The first clinical symptoms usually occur after a concentration of ca. 20 grass pollen grains in 1 m3 of air has been reached (Rapiejko et al 2004), whereas pollinosis occurs in all allergy sufferers at a concentration of more than 50 grains×m-3 of air (Rapiejko et al 2007)
This paper presents the results of analysis of the grass pollen seasons in Wrocław in the period 20032010
Summary
The Poaceae family is one of the most abundant families among different species of the Polish flora. It comprises over 180 species, out of which more than 30 species are of foreign origin (Szafer et al 1988). Grass pollen allergens are the greatest threat to allergy sufferers in Central and Western Europe, being the most frequent cause of seasonal allergic rhinoconjunctivitis and pollen asthma (Berger , 2003; D ’ Amato et al 2007). Across Europe, grasses have the longest-lasting pollen season – from May till the end of September. 20 grass pollen grains in 1 m3 of air has been reached (Rapiejko et al 2004), whereas pollinosis occurs in all allergy sufferers at a concentration of more than 50 grains×m-3 of air (Rapiejko et al 2007) The first clinical symptoms usually occur after a concentration of ca. 20 grass pollen grains in 1 m3 of air has been reached (Rapiejko et al 2004), whereas pollinosis occurs in all allergy sufferers at a concentration of more than 50 grains×m-3 of air (Rapiejko et al 2007)
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