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Korean J Parasitol > Volume 8(3):1970 > Article

Original Article
Korean J Parasitol. 1970 Dec;8(3):81-89. English.
Published online Mar 20, 1994.  http://dx.doi.org/10.3347/kjp.1970.8.3.81
Copyright © 1970 by The Korean Society for Parasitology
Study on the analysis of snails(Semisulcospira libertina), the first intermediate host of Paragonimus westermani in the Haenam area
Chung Wook Kim
Department of Parasitology, College of Medicine, Yonsei University, Seoul, Korea.
Abstract

Studies of the water analysis of the breeding place of the first intermediate host(Semisulcospira libertina) was carried out. The breeding place of Semisulcospira libertina in the Haenam area were found mainly in pebbly and sandy riverbed of the upper stream and halfway up the Donghae river, but we could not find the habitats of Semisulcospira libertina in the spring, paddyfield and tidal part of flow in which the content of Cl ion, Ca ion, total alkalinity, total hardness and pH were obviously higher than those of the breeding place.

The range of physical and chemical characters of the Semisulcospira libertina breeding water were as follows. 0.05-0.7 m/s of optimal flowing velocity of fresh water, 20-50 cm in depth, 7.12±0.17 of optimal pH range 19.4±4.92(mg/L)in total alkalinity, 9.4±2.97(mg/L) of Ca ion, 9.8±2.3(mg/L) of Cl ion content, 115.1±34.2(mg/L) of total hardness, but there were no remarkable differences between the habitat water and the contrasts in their specific gravities.

In the comparison of analytical result of the breeding water at Haenam, the content of Ca ion, Cl ion, total alkalinity, total hardness and pH showed a gradually higher value in the lower reaches of the river than those of the upper stream and halfway up the river.

Figures


Fig. 1
Distribution of streams in Haenam Gun.


Fig. 2
pH range in the water.


Fig. 3
Total alkalinity of the water.


Fig. 4
Ca ion content in the water.


Fig. 5
Cl ion content in the water.


Fig. 6
Optimal pH range in the water.


Fig. 7
Total alkalinity.


Fig. 8
Ca ion content in the water.


Fig. 9
Cl ion on content in the water.


Fig. 10
Total hardness.

Tables


Table 1
Flowing velocity of fresh waters at Haenam relative to the density of S. Libertina


Table 2
The depth of fresh waters at Haenam relative to the density of S. Libertina


Table 3
pH of fresh waters at Haenam relative to the density of Semisulcospira libertina


Table 4
Specific gravity of fresh waters at Haenam relative to the density of S. Libertina


Table 5
Alkalinity of fresh waters at Haenam relative to the density of S. Libertina


Table 6
Ca++ content of fresh waters at Haenam relative to the density of S. Libertina


Table 7
Cl-content of fresh waters at Haenam relative to the density of S. Libertina


Table 8
Total hardness (CaCo3) of fresh waters at Haenam relative to the density of S. Libertina


Table 9
Non-Calcium hardness of fresh waters at Haenam relative to the density of S. Libertina

References
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