[The pollen survey and dynamic statistics of patients with allergic rhinitis in Hakodate]

We have investigated the pollen survey (1994-1998) and dynamic statistics of patients with allergic rhinitis (1999-2000) in Hakodate, which is located southern part of Hokkaido. We have noted the pollen dispersion of Cryptomeria japonica, Cupressaceae, white birch, Gramineae and Artemisia. Especially, a lot of dispersion of Cryptomeria japonica has been noted in April. Concerning the dynamic statistics of patients with allergic rhinitis, we have investigated the 192 patients with allergic rhinitis in Hakodate municipal hospital. There has been a lot of pollinosis in March, April, May and September. Frequency of positive reaction to the specific IgE have been 38.0% of house dust, 16.9% of Artemisia, 13.2% of Gramineae, 10.3% of white birch, 9.0% of Cryptomeria japonica and 6.9% of cat in 379 subjects. In conclusion, we have noted that Cryptomeria japonica and white birch in addition to Gramineae and Artemisia are becoming more important antigen in patients with pollinosis in Hakodate, south part of Hokkaido.