AN EPIDEMIOLOGICAL EXAMINATION OF POLLINOSIS IN AN APPLE (MALUS PUMILA MILLER VAR.DOMESTICA SCHNEIDER) AND PEAR (PYRUS SEROTINA VAR.CULTA) GROWING DISTRICT

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  • リンゴ・ナシ栽培地域(長野県松川町)の花粉症に関する疫学的検討

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Abstract

An epidemiological examination was carried out on 1514 people in Matsukawa Town (835 of them were engaged in the cultivation of apples and pears and 679 were not) in order to reveal how strong an influence the cultivation of the town's orchards has on the occurrence of pollinosis among the inhabitants. The results were as follows: 1. The rate of people showing positive RAST scores or any allergic symptoms during the period when apples and pears were in bloom was 6.3% for apple pollen and 3.5% for pear pollen among apple and pear-growing farmers in Ueoshima district, 2.5% and 1.8% respectively in Kamikatagiri district and 0.3% and 0.15% among people who had never been engaged in apple and pear cultivation. 2. The positivity rate of RAST scores was also significantly higher among apple and pear-growing farmers than among other members of the population for both orchard grass pollen and Japanese cedar pollen. The rate for orchard grass pollen was markedly high, especially in Ueoshima district (18.9% of all apple and pear-growing farmers) and it was considered that thick growths of orchard grass in the orchards were also an important factor in causing pollinosis in apple and pear-growing farmers.

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