Page 32 - RPIA_27-1

Raquel Ferro, Carlos Nunes, Irene Camacho, Miguel Paiva, Mário Morais -Almeida

níveis de Coprinus, Agaricus e Leptosphaeria, apresentando uma correlação negativa com os níveis de Cladosporium, Al-
ternaria e Ustilago. Conclusão: Este estudo permitiu conhecer o tipo e a distribuição dos esporos de fungos presen-
tes na atmosfera de Lisboa. Verificou -se uma tendência sazonal semelhante nos três anos estudados. Os níveis de
esporos de fungos mais elevados foram registados no verão e no outono. O género Cladosporium representou 50%
do total dos esporos coletados. A variação dos parâmetros meteorológicos influencia, claramente, as concentrações
dos esporos de fungos. A temperatura média foi o fator que exerceu maior influência nos níveis de esporos.

Palavras -chave: Aerobiologia, esporos de fungos, fatores meteorológicos, Lisboa.

ABSTRACT

Objectives: To evaluate the distribution of potentially allergenic spores in the city of Lisbon in the triennium 2014-
-2016, to charactere its prevalence in the outdoor atmosphere and to study the influence of the meteorological factors on
the concentrations. Methodology: Monitoring data from the Lisbon station of the Portuguese Aerobiology Network of
®
fungal spores from 1 January 2014 to 31 December 2016 were analyzed. A Burkard Seven Day Volumetric Spore -trap
collector and optical microscope reading system based on the analysis of a longitudinal line at the center of the slide with
a magnification of 600x were used. The influence of the meteorological factors on the concentrations of fungal spores was
examined with the Spearman correlation analysis. Results: In this study, a mean daily concentration of 3.118 spore fungal/
3
m spores was obtained. The highest annual concentration observed was in 2014 (1.258.580 spore fungal/m ). The most
3
abundant types of fungi spores were Cladosporium cladosporoides (48,2%), Coprinus (4,5%), Leptosphaeria (2,5%),
Agaricus (2,0%), Cladosporium herbarum (1,9%), Ustilago (1,5%) and Alternaria (1,2%). The highest concentrations of
fungal spores occurred in the summer and autumn months, being particularly highest in the autumn. A clear effect of
meteorological factors on the fungal spores concentrations was observed. The mean temperature presented a positive cor-
relation with total spores, Cladosporium, Alternaria and Ustilago concentrations and a negative correlation with Cop-
rinus, Agaricus and Leptosphaeria levels. Relative humidity and precipitation had a positive effect with Coprinus,
Agaricus and Leptosphaeria concentrations but negative with total spores, Cladosporium, Alternaria and Ustilago
concentrations. Conclusions: This study allowed to know the type and the distribution of fungal spores present in the
atmosphere of Lisbon. There was a similar seasonal trend in the three years studied. The highest levels of fungal spores
were recorded in summer and autumn. The genus Cladosporium represented 50% of the total spores collected. The varia-
tion of the meteorological parameters clearly influences the concentrations of fungal spores. The mean temperature was
the factor that exerted the greatest influence on the spore levels.

Keywords: Aerobiology, climate parameters, fungal spores, Lisbon-

30

REVIST A POR TUGUESA DE IMUNO ALERGOLOGIA