[Analysis of sensitization characteristics of artemisia pollen in the Inner Mongolian grassland region of China].

Objective:The distribution and sensitization characteristics of the pollen of artemisia were analyzed in the grasslands of Inner Mongolian. Method:A face-to-face questionnaires survey about the distribution and sensitization characteristics of the pollen of artemisia was performed together with pollen skin prick tests（SPTs） and measurements of the daily pollen count in 6 region（Xilinhot, Erenhot, Duolun, Tongliao, Jarud, Kailu） in the grasslands of Inner Mongolian. Result:A total of 6043 subjects completed the study. The prevalence of artemisia hay fever was 14.38%（869/6043）. The highest prevalence was found in the 18-39 age group（43.27%, 376/869）. Subjects from urban areas showed higher prevalence of AR than from rural areas（61.22% vs. 38.78%, P<0.01）. There were significant regional differences in the prevalence of AR（P<0.01） among the six areas investigated. The main clinical symptoms of artemisia hay fever were sneezing（96.78%） and itchy nose（91.60%）. The main clinical symptoms of ocular were itchy（68.58%）. Among associated symptoms of artemisia hay fever, fatigue and somnolence were common. The peak season of artemisia hay fever was in August. The season of onset of artemisia hay fever coincides with the peak time of pollen dispersal of artemisia. The SPT positive of artemisia pollen in the investigated 6043 people was 23.98%. Among comorbidities, allergic conjunctivitis accounts for 70.77% （615）, food allergy accounts for 85.85% （746）, asthma accounts for 9.55% （83）. Conclusion:The prevalence of artemisia hay fever in grassland of northern china stays at a high level. It is very important to control artemisia hay fever.