<原著>水田皮膚炎に関する研究 : 1.山口県下の流行地における疫学的調査

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An endemic dermatitis of unknown etiology has occurred among farmers working in the paddy fields of Ikenoura and Yashima, the southern district of Yamaguchi prefecture. The dermatitis was characterized by erythemato-papulo-vesicular eruptions accompanied with severe itching. The eruptions were generally located on forearms, hands and lower legs exposed to paddy field water. The symptoms were transient, lasting for only 7-10 days. No chemical substances which may cause dermatitis were found in paddy field water of the endemic areas. A search for the snail intermediate hosts collected from the paddy fields of Ikenoura area, Yanai city, revealed that Radix japonica (monoaragai) of the endemic area was infected with the furcocercous cercariae belonging to the genus Trichobilharzia. The cercariae were identified as the larvae of T. physellae on the basis of detailed morphological observations of living and preserved specimens. The furcocercous cercariae were also detected from Austropeplea ollula (himemonoaragai) which was collected from the paddy fields of Yashima, Kaminoseki-cho. The species of this parasite was not yet identified. The experimental infection of living cercariae into the human skin was successful and the cercariae were able to produce a dermatitis quite similar to that prevailing in the endemic areas. It was proved that the paddy field dermatitis in the southern district of Yamaguchi prefecture was caused by the accidental invasion of the cercariae belonging to the genus Trichobilharzia into the human skin, and that R. japonica and A. ollula served as the intermediate host of the parasites.
近畿大学の論文
1978-06-25

<原著>水田皮膚炎に関する研究 : 1.山口県下の流行地における疫学的調査

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