Aerobiological study in Lima, Peru

Silvia Uriarte, Óscar Calderón

Resumen


Background: Knowledge about seasonal and annual fluctuations in airborne pollen and fungal spores in any geographical area is essential for effective diagnosis and treatment of allergy diseases.

Objective: Our objective was to identify and register the most important aeroallergens in the atmosphere of Lima urban city.

Methods: The pollen and fungal spores’ counts were made according to standardized technique with Burkard spore trap for 7-days and the analysis procedures recommended by the Spanish Aerobiology Network. The trap was installed on the roof of a building, which is 20 m high, in the west-south of the Lima urban and “financial” area. The sampling period was performed from February 2012 to March 2013.

Results: The three most important fungal spores during all the periods of sampling, in order of abundance, were Cladosporium herbarum (75.115 %), Nigrospora spp. (22.31 %) and Alternaria alternata (2.57 %), with higher frequency in autumn and summer. The greatest pollen counts were recorded in winter and summer. We found 10 leading taxa: Poaceae (22.6 %), Oleaceae (20.9 %), Compositae (Artemisia spp.) (19.38 %), Urticaceae (16.45 %), Betulaceae (Casuarina) (9.03 %), Myrtaceae (Eucalyptus) (7.21 %), Betulaceae (Alnus) (2.19 %), Chenopodiaceae-Amaranthaceae (1.88 %), Asteraceae (Ambrosia) (0.15 %), and Polygonaceae (Rumex spp.) (0.10 %).

Conclusions: We report the first aerobiological study in Lima city performed with Burkard spore trap for 7-days technique. The West-South population of Lima urban city is exposed to several aeroallergens with predominance of fungal spores. The results of this study should be compared with data from the forthcoming years, to identify seasonal and annual fluctuations, and extend the traps to other locations.


Palabras clave


Aeroallergens; Airborne pollen; Fungal spores

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