Masuda S, Ukai K, Takeuchi K, Okawa C, Sakakura Y
Department of Otorhinolaryngology, Mie University School of Medicine, Japan.
Arerugi. 1996 Jun;45(6):570-6.
Airborne scattering of Cryptomeria japonica pollen depends on climate. Total pollen count and scattering pattern varies from one year to another. We counted Cryptomeria japonica pollen in February and March from 1993 to 1995 at several points in Mie Prefecture. One-third to two-thirds of all the patients who visited our clinic for the first time in the pollen period were occupied by allergic patients. The pollen count in 1995 amounted to 17943/cm2 at Tsu and 99512/cm2 in the whole prefecture, which is the largest in the past 12 years. The number of days in which patients severely suffered was correlated to the pollen count for the past three years. It was shown that nasal symptoms developed after certain amount of pollen had scattered, but the severity of symptoms thereafter largely depended on the total pollen count. At Tsu in 1995, we scarcely had pollen scattering in February but had tremendous amount of pollen count in March. Percentage of development of nasal symptoms among thirty patients was well correlated to the logarithm of accumulated pollen count. When accumulated pollen count reached to 100/cm2, half the patients developed symptoms. Most of the patients developed symptoms when it reached to 1000/cm2. Since there is a great interindivisual difference in when and how much patients have nasal symptoms, the choice of therapy should be based not only on the pollen count but also on the symptom and condition of each patient.
日本柳杉花粉的空气传播扩散取决于气候。花粉总数和扩散模式每年都有所不同。我们在1993年至1995年的2月和3月，对三重县的几个地点的日本柳杉花粉进行了计数。在花粉期首次到我们诊所就诊的患者中，三分之一到三分之二是过敏患者。1995年，津市的花粉计数达到17943/平方厘米，全县为99512/平方厘米，这是过去12年中最高的。患者严重发病的天数与过去三年的花粉计数相关。结果表明，在一定量的花粉扩散后出现鼻部症状，但此后症状的严重程度很大程度上取决于花粉总数。1995年在津市，2月几乎没有花粉扩散，但3月花粉计数极高。30名患者中鼻部症状出现的百分比与累积花粉计数的对数密切相关。当累积花粉计数达到100/平方厘米时，一半的患者出现症状。当达到1000/平方厘米时，大多数患者出现症状。由于患者出现鼻部症状的时间和程度存在很大的个体差异，治疗方法的选择不仅应基于花粉计数，还应基于每个患者的症状和病情。
