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錦江上流産 다슬기(Semisulcospira spp.)에 奇生된 吸蟲類 幼生에 關한 硏究
朴塡淑,金鐘煥,金南萬 忠南大學校 環境問題硏究所 1987 環境硏究 Vol.5 No.1
The studies on cercarial fauna and identifications from Semisulcospira snails were carried out in the 3 localities along the upper stream and 2 tributaries of Kumgang, other locality of Kagokchon, Kangwon-do. The emerging cercariae were found from 172(4.9%) among 3,489 snails and were classified as the following 9 species; Metagonimus yokogawai Katurada, 1913, Metagonimus yokogawai Miyata type, one identified Metagonimus spp., Pseudexorchis major Yamaguti, 1938, Cercaria yoshidae Cort et Nichols, 1920, Cercaria nipponensis Faust, 1924, Cercaria incerta Faust, 1924, Cercaria innominatum Faust, 1924, Pseudobilharziella corvi Yamagusti, 1941. The geographical distribution of cercaria was shown that the highest incidence was observed in the snails collected at Soch'on-ri station 10.0-10.3%, and followed Muju station 7.7-8.0%, Sutong station 5.0-6.5%, Kasuwon-dong station 2.0-3.3%, Hwanggan station 2.0-2.8% and Kagok Ch'on 2.6-4.8%. The monthly fluctuation of cercaria from the snails 8.2% in July 1985, 15.2% in August, 11.1% in September, 4.5% in October, 2.8% in November, 3.4% in April 1986, 5.0% in May, 6.5% in June. Experimental infection of the cercariae of Metagonimus spp. to the goldfish was carried out in order to identify the cercarial species of adult worms. The infection rate of metacercaria in the fished was 22.9% and was fin of the fish(86.7%) the highest metacercarial infection site, the next was scale (13.3%), however, no metacercaria was found in muscle as well as another parts of the body. Adult worms were removed from the small intestine of albino rat after 10days from the infection with metacercariae from the goldfish. The morphological characteristics of the worms was the same species as Metagonimus yokogawai Miyata type.