Investigating Airborne Pollen Grains and Fungal Spores that Might be Related to Thunderstorm Asthma Attacks

Hassan Dehdari Rad, Heydar Maleki, Gholamreza Goudarzi, Mohammad Ali Assarehzadegan, Ismaeil Idani, Ali Akbar Babaei, Abdolkazem Neisi, Saeed Jahantab, Mohammad Reza Parishani, Mehri Dinarvand, Armin Sorooshian, Foroogh Namjoyan, Mojtaba Nakhaei Pour

Research output: Contribution to journalArticlepeer-review


Pollen and fungi cause acute respiratory attacks every year around the world. Thunderstorm asthma attacks hospitalized thousands of people in Ahvaz during the first rain meanwhile pollen grains and fungal spores are the strongest reasons for this phenomenon. Therefore, in the current study different types of pollen grains and fungal spores were collected by Burkard pump during autumn and winter of 2016–2017 and 2017–2018. The analysis characterized pollen grains and fungal spores with homogeneous distributions during the sampling periods. A fungal spore called Curvularia genous showed the most significant correlation with daily rainfall. Daily rainfall and Curvularia genous spores reached their peak, simultaneously. During the first rain, it was considerably higher than other days of the study period, especially in contrast with the second and third rainy days. Also, reverse wind direction—blowing from south—during the respiratory outbreaks may reveal the synergistic effect with air pollutants from heavy industries. We concluded that the autumnal respiratory outbreak in Ahvaz might be triggered by a mixture of fungal spores (especially Curvularia genous), industrial air pollutants, and pollen grains of the predominant tree of Ahvaz urban green infrastructure which is Conocarpus erectus.

Original languageEnglish (US)
Article number28
JournalInternational Journal of Environmental Research
Issue number2
StatePublished - Apr 2023


  • Ahvaz
  • Conocarpus erectus
  • Curvularia genous
  • Fungal spores
  • Pollen grains
  • Thunderstorm asthma attack

ASJC Scopus subject areas

  • Environmental Science(all)


Dive into the research topics of 'Investigating Airborne Pollen Grains and Fungal Spores that Might be Related to Thunderstorm Asthma Attacks'. Together they form a unique fingerprint.

Cite this