PRACTICA OTO-RHINO-LARYNGOLOGICA
Vol. 102 No. 10 October 2009
The Study on the Change of Symptoms in Allergic Rhinitis
during Asian Sand Dust Phenomenon
Tatsuaki Sato
(Sato ENT Clinic)
Allergic rhinitis, especially Japanese cedar pollinosis, is a major problem in Japan. On the other hand, recently Asian sand dust (ASD) phenomenon originating in the deserts of Mongolia and China has also been reported to affect human health. The ASD concentrations measured by laser radar beginning in 2007 made it possible to detect atmospheric ASD particles even when ASD phenomenon is not observed.
Objective: As ASD phenomenon occurs concomitantly with pollen season in Japan, the aim of this study is to investigate the effects of ASD on allergic rhinitis in periods when ASD phenomenon is observed and is not observed. Patients of allergic rhinitis were retrospectively investigated between April 1st and May 31st, 2007.
Results: Although the floating pollen counts were low during this study, 53 of 77 patients (68.8%) with allergic rhinitis complained of aggravated nasal symptoms, and developed respiratory symptoms such as sore throat, abnormal sensation in the pharyngolarynx and cough. This trend was noted in those with seasonal allergic rhinitis such as Japanese cedar pollinosis both when ASD phenomenon was observed and non-observed.
Conclusion: The results suggest that ASD may adversely affect allergic rhinitis symptoms regardless ASD levels. Although further investigation is required, it is important to pay more attention to ASD to maintain good quality of life of the patients with allergic rhinitis.
Key words :allergic rhinitis, Asian sand dust phenomenon, Japanese cedar pollinosis