Airborne Pollens and their Association with Meteorological Parameters  in the Atmosphere of Shiraz, Southwest Iran

Heidar Ali  Kafashan; Ahmad Reza  Khosravi; Soheila  Alyasin; Najmeh  Sepahi; Zahra  Kanannejad; Farzaneh  Mohammad Alizadeh Shirazi; Sahar  Karami

doi:10.18502/ijaai.v20i3.6332

Heidar Ali Kafashan Department of Allergy and Clinical Immunology, Namazi Hospital, Shiraz, Iran
Ahmad Reza Khosravi Department of Biology, Faculty of Science, Shiraz University, Shiraz, Iran
Soheila Alyasin Department of Allergy and Clinical Immunology, Namazi Hospital, Shiraz, Iran
Najmeh Sepahi Allergy Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
Zahra Kanannejad Allergy Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
Farzaneh Mohammad Alizadeh Shirazi Allergy Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
Sahar Karami Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran

DOI: https://doi.org/10.18502/ijaai.v20i3.6332

Keywords: Hypersensitivity; Meteorological factors; Pollen

Abstract

Airborne pollen is considered one of the causative agents of hay fever, allergic rhinitis, conjunctivitis, and asthma. We aimed to investigate airborne pollens in the context of Shiraz located in the southwest of Iran and find their association with meteorological parameters. The survey was conducted from October 2017 to September 2018, using seven days of volumetric Burkard spore trap, located in the center of the city. A total of 5810 pollen grains/m3 belonging to 15 taxa were identified and recorded. Among them, 73.8% was the tree, while the grass, shrub, and weed constituted 13.56%, 3.5%, and 9.2% of total reported pollens, respectively. The major pollen types were Platanaceae (28.39%), Oleaceae (21.17%), Pinaceae (15.11%), Amaranthaceae (9.29%), and Brassicaceae (8.02%). A higher number of pollen counts and types were recorded in March, followed by September, while it was lower in May. Meteorological parameters were correlated with the monthly pollen counts. Wind speed was found to have a positive correlation with Platanaceae concentration. The significant correlation between pollen concentration and the temperature was positive for Poaceae, Amaranthaceae, and Plantaginaceae and negative for Rosaceae, Oleaceae, and Ulmaceae. Poaceae and Amaranthaceae were negatively correlated with humidity and positively with Rosaceae, Oleaceae, and Plantaginaceae. A negative correlation was found between rainfall and Poaceae and Amaranthaceae, while Plantaginaceae had a positive correlation with this parameter. The results of this study may be helpful for allergologists in the diagnosis and treatment of airborne allergic disorders due to pollen grains.