| Epidemiological
studies of Clonorchis sinensis in the coastal areas of Kyungpook; Korea |
| Epidemiological studies of Clonorchis sinensi in the Coastal Areas of Kyungpook Korea |
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이수형; 안성훈; 주종윤 |
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| Abstract |
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In order to determine the
epidemiological patterns of the liver fluke; the infection rates for Clonorchis larvae in the snails and fish hosts; and the prevalence of C. sinensis among the residents in the coastal areas of Kyungpook Province were studied from April; 1992 to September; 1993.
Four snail habitats were found in the river Hyungsan and some streams. One area had snails infected with Clonorchis cercaria; but the proportion of infected snails was very low; the average rates varying from zero to 0.081 percent. Of the 19 species of fish; 3 species were infected with the encysted larvae of C. sinensis. Infection rates varied greatly by the fish species; and ranged from 6.7 percent in P. herzi to 88.9 percent in G. artomaculatus. In the intensity of infection with C. sinensis; G. atwmaculatus was the most heavily infected species; the average number of cysts per gram of the fish flesh being 72.2; followed by P. herzi with 53.0 cysts.
The infection rate for C. sinensis among the residents was relatively high; being found to be 5.9 percent with a prevalence of 7.0 percent in males and 5.1 percent in females. The difference in the rate of infection between males and females is found to be statistically significant(t>2).
For the quantitative analysis of epidemiology of C. sinensis; a special type of simple catalytic model was applied to the sex and age infection rates revealed by stool examination for Clonorchis eggs. The simple catalytic curve for males was y=0.21(l-e "
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| Key Words:
Clonorchis sinensis,
Metacercaria, Snail and fish intermediate hosts, Epidemiology, Kyungpook Province, Catalytic model, prevalence |
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