RELATIONSHIP BETWEEN SEASONAL AND ANNUAL TOTAL POLLEN COUNTS OF CRYPTOMERIA-JAPONICA AND CUPRESSACEAE AND NUMBER OF OUTPATIENTS WITH SUGI POLLINOSIS IN CENTRAL JAPAN

From twelve year palynological investigations, the airborne pollen grains of Cryptomeria japonica and Cupressaceae were observed from mid-February to the end of April in Kanto district, central Japan. A positive correlation between annual total count of the pollen grains and meteorological factors, especially the mean temperature of the previous July, was recognized. Seasonal or daily variation of the pollen grains correlated markedly with maximum daily temperature and maximum daily south to west wind. The relationship between the number of outpatients with Sugi pollinosis and the pollen counts of the allergen was clear in higher count seasons, but was not distinctly shown in lower count seasons. © 1990.