Taira H, Shouji T, Teranishi H, Kenda Y, Keyaki Y
Forest Exp. Stn., Toyama For., Toyamashi.
Arerugi. 1995 Apr;44(4):467-73.
Generally, airborne scattering of sugi (Cryptomeria japonica D. Don) pollen begins to be observed coincidentally with the flowering of the male sugi flowers between February and April. However the male sugi flowers disperse a certain amount of pollen in early January, only small levels of which can be detected with a Durham's sampler. In some Japanese cedar pollinosis patients, allergic symptoms have been reported to occur in early January. Among 1,366 Japanese cedar pollinosis patients studied, 265 have experienced allergic symptoms before the first day of pollen scattering as determined with a Durham's sampler. Accordingly, it is suggested that substantial amounts of sugi pollen are scattered from early January, and that clinical symptoms can be induced in highly sensitive Japanese cedar pollinosis patients from early January, even before the flowering of sugi.
一般来说，柳杉（日本柳杉）花粉的空气传播通常在2月至4月间雄花开花时开始被观测到。然而，雄柳杉花在1月初会散落一定量的花粉，其中只有少量能用Durham采样器检测到。在一些日本雪松花粉症患者中，有报告称在1月初就出现了过敏症状。在研究的1366名日本雪松花粉症患者中，有265人在Durham采样器确定的花粉传播首日之前就出现了过敏症状。因此，有人认为从1月初开始就有大量柳杉花粉散落，并且即使在柳杉开花之前，高度敏感的日本雪松花粉症患者在1月初就可能引发临床症状。
