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경상남도 남강유역의 의용패류 분포 및 흡충류 유충의 감염실태 조사

Authors
 조해창 
Issue Date
1984
Description
의학과/석사
Abstract
[영문]

[한글]

경상남도 진주시, 진양군, 산청군, 하동군과 사천군등 5개 시, 군인 연접해 있는 진양

호는 남강댐의 준공으로 이루어진 인공호수로서 이에 근접되어 있는 여러지역이 새로운

간흡충 침윤지로 알려져 있다. 본 연구는 진양호 주변지역의 의용패류를 중심으로한 담수

패류의 분포를 조사하고, 그들의 서식환경 및 흡충류 유미유충(cercarial trematodes)의

감염 실태를 조사하고저 1983년 8월부터 11월까지 4개월간 현지에서 행한 패류생태학적

연구와 일환이다.

진양호 상, 중, 하류 6개지역에서 채집분류된 담수패류는 총9종으로서 복족류(Gastropo

da) 4종, 즉 다슬기 (Semisulcospira libertina), 논우렁(Cipangopaludina chinensis),

왜우렁(Parafossarulus manchouricus) 그리고 물달팽이(Radix auricularia)와 이매패류(P

elecypoda) 5종, 즉 말조개(Unio douglasiae), 펄조개(Anodonta woodiana), 곳체두드럭조

개(Lamprotula gottschei), 재첩(Corbicula fluminea) 그리고 민물담치(Limnoperma lucus

tris)등이었다.

인체기생흡충류 매개패류로서는 왜우렁, 다슬기, 물달팽이등 3종이 채집되었던 바 왜우

렁은 주로 수심이 얕은 상류지역 소택지에서, 다슬기는 이매패류와 함께 모두 댐하류 계

류에서 채집되었고 물달팽이는 왜우렁과 같은 서식지에서 공존해 있었다. 진양호주변 6개

채집지역의 수질분석 결과 용존산소량(dissolved oxygen)은 6.0-9.6ppm 범위였으며, 생

물화학적 산소요구량(biochemical oxygen demand, B0D^s)은 0.4-1.6ppm 범위이여서 비교

적 수중미생물이나 유기물질의 오염이 적은 지역임을 알 수 있었다. 일면 zinc, lead, ca

dmium, copper, manganese, calcium, magnesium, 및 mercury 이온함량을 측정하였던바 왜

우렁 서식지에서 calcium 이온 함량이 월등히 높았을 뿐 전 채집지역에서 모든 금속 이온

함량은 대체로 낮은 수준이였다.

왜우렁에 있어 흡충류 감염율은 6.9%이었고, 그중 간흡충(Clonorchis sinensis) 유미유

충 감염율은 0.14%로서 극소수의 왜우렁이 간흡충 유충에 감염되었음을 볼 수 있었다. 그

외에 Furcocercus cercariae, Loxogenus liberum type Ⅰ 및 Ⅱ의 흡충류 유충이 검출되

어 총 4종의 유미유충이 검출되었다.

다슬기에 있어 흡충류 감염율은 4.8%였으며, 그중 요꼬가와 흡충(Metagonimus yokogawa

i)유미유충 감염율은 1.5%였고 폐흡충 (Paragonimus westermani)유충은 검출되지 않았다.

그외에 Cercaria yoshidae(B type ), Cercaria cristata, Cercaria innominatum, Cercar

ia of Centrocestus formasanus와 Cercaria nipponensis등의 흡충류 유충이 검출되어 총

6종의 유미유충을 검출할 수 있었다.





Distribution of medically important freshwater snails and larval trematodes from

Parafossarulus manchouricus and Semisulcospira libertina around the Jinyang Lake in



Kyungsang-Nam-Do, Korea



Hae-Chang Cho

Department of Medical Science The Graduate School Yonsei University

(Directed by Professor Keun-Tae Lee, M.D.)



The Jinyang Lake is dammed up Nam River, and surrounded by Jinju City and four

counties ; Jinyang, Sanchong, Hadong, and Sachon in kyungsang-Nam-Do, Korea. The

areas around this man-made lake have been known as an endemic focus of

clonorchiasis in Korea. The present study was first aimed to know the distribution

of freshwater molluscs including medically important snails, and larval trematodes

shed from Parafossarulus manchouricus and Semisulcospira libertina. In addition to

above studies, water analyses in each snail habitat were carried out in order to

figure out a part of their environmental factors.

This malaco-ecological survey was done at the six areas around upper, middle and

lower parts of the lake for 4 months, August through November, 1983.

Total nine species of freshwater molluscs were collected throughout the study: 4

species of gastropods; Semisulcospira libertina, Cipangopaludina chinensis,

Parafossarulus manchouricus and Radix auricularia, and 5 species of bivalves; Unio

douglasiae, Anodonta woodiana, Lamprotula gottschei, Corbicula fluminea and

Limnoperma lucustris.

Out of nine species of freshwater molluscs, three species of gastropods; S.

liberlina, P. manchouricus and R. auricularia were medically important in terms of

the transmission of dugenetic trematodes to humans. P. manchouricus and R.

auricularia were mainly collected from the shallow ponds and the irrigation

channels with the muddy basin, but S. libertina and the bivalves were only

collected from the stream of Nam River where the gravels and rocks were dominant.

The Levels of dissolved oxygen(D.0.) and biological oxygen demand (B.0.D.5) of

the water specimens sampled from the study areas were ranged 6.0 ppm to 9.6 ppm and

0.4 to 1.6ppm, respectively. As a result, it is considered that water system around

the Jinyang Lake might be relatively clean without any heavy pollution of aquatic

microorganisms and organic materials during the period of this study. On the other

hand, eight metalic constituents from the water samples were aslo assayed, and all

metalic ions detected were remarkably low below the legal criteria.

However, calcium ion in the water samples from the habitats of p. manchouricus

was considerablly higher than others.

Infection rates of digenetic trematodes in the snails were 6.9% in P.

manchouricus and 4.8% in S. 1ibertina, respectively. P. manchouricus snails

harbored with the cercariae of Clonorchis sinensis were only 0.14% among the snails

examined, and other trematode cercariae except cercaria of C. sinensis were:

Furcocercus cercariae, cercaria of Loxogenus liberum type Ⅰ and Ⅱ. S. libertina

snails parasitized with the cercariae of Metagonimus yokogawai were 1.5% out of the

snails examined, and no cercaria of Paragonimus westermani was found in S.

libertina snails in the present study. Digenetic trematode cercariae other than M.

yokogawai observed in S. libertina snails were : Cercaria yoshidae(B type).

Cercaria cristata, cercaria innominatum, cercaria of Centrocestus formosanus and

cercaria nipponensis.
Full Text
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