Association between airborne allergenic pollen distribution and allergic diseases in Ordos city

doi:10.3969/j.issn.1006-7795.2025.06.019

Abstract

Abstract: Objective To explore the relationship between the distribution of major airborne sensitized pollen and the number of visits for allergic diseases in Ordos city. Methods Daily airborne allergenic pollen monitoring was performed by gravitational method June 1,2023 to May 31,2024 in Ordos city. The number of outpatients with allergic rhinitis (AR), allergic asthma (AA) or allergic conjunctivitis (AC) who visited the hospital was collected. Relationship between pollen and the number of visits of patients with each disease was analyzed by Spearman index. Results ①The airborne allergenic pollen was collected every month all year round in Ordos city. Through the whole year of the total quantity of pollens was 66 628 grains/1 000 mm2 and two peaks of pollen concentration in air were observed，which happened in spring (from March to May) and in summer and autumn(from July to September). In spring, the main pollens were tree pollens, which principally distributed in Populus pollen, Pinus pollen, Ulmus pollen, Betula pollen and Cupressaceae pollen. In summer and autumn, the main pollens were weed pollens, which mainly included Artemisia pollen, Chenopodiaceae pollen or Amaranthaceae pollen, Poaceae pollen, Humulus pollen or Cannabis pollen. ②The peak of AR visits occurred in spring (from March to May)and in summer and autumn(from July to September), and the number of visits in summer and autumn was significantly higher than that in spring. The peak of AA and AC visits occurred only in summer and autumn. ③In Ordos city, the total daily pollen concentration and the concentration of four major allergenic pollens in summer and autumn (from July to September) were positively correlated with the total daily visits, AR daily visits, AA daily visits and AC daily visits. In spring (from March to May), the total daily pollen concentration, the pollen concentration of Pinus and Betula were positively correlated with the total daily visits and AR daily visits. Conclusion The pollen distribution in Ordos city showed two peaks in spring and summer and autumn. AR, AA and AC showed peak visits in summer and autumn. It is suggested that summer and autumn are the high occurrence period of pollen-related allergic diseases in Ordos city, and Artemisia pollen is the most important allergenic pollen.

Key words: pollen, allergic rhinitis, allergic asthma, allergic conjunctivitis, pollen concentration, Artemisia pollen

CLC Number:

R765

Ning Huiyu, Yang Meirong, Liang Yuanyuan, Ma Tingting, Wang Xiangdong, Liu Lei, Li Shulin, Wang Xueyan, Zhang Luo. Association between airborne allergenic pollen distribution and allergic diseases in Ordos city[J]. Journal of Capital Medical University, doi: 10.3969/j.issn.1006-7795.2025.06.019.

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