• Parasites, Hosts and Diseases
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• v.26 no.3
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• pp.189-198
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• 1988

The fresh water snail, Hippeutis (Helicorbis) cantori, caught from the rice paddies in Namyangju-gun, Gyeonggi.do, was found to be a new second inter- mediate host of 5. cinetorchis in Korea. The metacercariae were found from 89 (76.7%) out of 116 snails examined and the average metacercarial burden was 4.7 per infected snail. Some developmental characteristics of 5. cinetorchis were observed after experimental infection of the metacercariae to rats and mice.

• Parasites, Hosts and Diseases
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• v.28 no.1
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• pp.39-44
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• 1990

The life history of Echinostoma cinetorchis was completed in the laboratory using Hippeutis cantors as the first and second intermediate host. The incubation for maturation of eggs and hatching of miracidia took 24 days at 28℃. On the 66th day after miracidial challenge, 16 snails were crushed and examined for the presence of E. cinetorchis larvae. The metacercariae were detected in all of the snails, and from three of them were found the rediae and cercariae. The morphological characteristics of the larvae and the experimentally obtained adults were compatible with that of E. cinetorchis.

• Parasites, Hosts and Diseases
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• v.26 no.3
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• pp.179-188
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• 1988

The life cycle of Fibricola seoulensis was studied in the laboratory and in the field, with special interests in the larval developments within the eggs and in the intermediate hosts. The first emergence of miracidia after incubation of eggs in 26C water began on the ninth day. The miracidia, elongate and cylindrical shape, had epidermal plates in the formula of 6, 9, 4 and 3, with two pairs of flame cells and lateral processes. A kind of fresh water snail, Hippeutis (H.) cantori, was found to shed furcocercous cercariae from the 13th day after experimental challenge with miracidia while Physa acute failed to shed. The same kind of snail collected from the field also shed the same cercariae. The cercariae were equipped with 2 pairs of penetration glands and 5 pairs of fame cells. The tadpoles of Rana nigromaculata were found susceptible to experimental infection with the cercariae. The same kind of tadpoles collected from various areas were also found naturally infected. The metacercariae in the tadpoles which were infected experimentally became infective to the definitive host in 21 days. The metacercariae were located free in the body cavity of tadpoles, and attained sexual maturity in rats in 7 days. The present study successfully followed the complete life cycle of F. seoulensis and found that it is possible to maintain the life cycle in the laboratory.