This study investigate whether the factors of clonorchis sinensis infection among the residents in vicinity of Nakdong river and infection status with clonorchis sinensis metacercaria of fishes in the stream. In this study, we selected two regions around the midstream of Nakdong river and three regi...
This study investigate whether the factors of clonorchis sinensis infection among the residents in vicinity of Nakdong river and infection status with clonorchis sinensis metacercaria of fishes in the stream. In this study, we selected two regions around the midstream of Nakdong river and three regions around the upper stream of the river; collected freshwater fishes from the stream to examine their metacercarial infections; and studied the status and causes of clonorchis sinensis infection in 552 residents living within 5 kilometers from the river. Among the 552 residents studied, 13.8% of them are infected with C. sinensis The infection rate in man, 19.8%, is significantly higher than that in woman, 8.7%. According to regions selected, the infections rates in Andong, Uiseong, Mungyeong, Seongju, and Dalseong were 24.5%, 19.0%, 16.1%, 3.3%, and 6.2%, respectively, which indicates that the infection rates in residents living in upper stream areas are significantly higher than those of residents living in midstream area. Among 379 freshwater fishes of 20 species that were collected in the five regions, 41 fishes of 8 species were infected with clonorchis sinensis metacercaria. The freshwater fishes of clonorchis sinensis metacercaria infection rates caused by freshwater fishes that are known to the second intermediate hosts for C. sinensis are 30.6% in Andong region, 17.3% in Uiseong region, 8.6% in Seongju region, 5.7% in Mungyeong region, and 3.2% in Dalseong region. There is a highly positive correlation(by 0.795 correlation coefficient) between the C. sinensis infection rate in residents in the selected regions and fishes infected with clonorchis sinensis metacercaria in the stream (the relationship is defined as a linear regression model). However, there is no statistical significance among the regions because we have the data of only 5 regions. The study shows not only the fact that there is very high clonorchis sinensis infection rate in residents living in the midstream and upper stream of Nakdong river, but that many of freshwater fishes in the stream are infected with clonorchis sinensis metacercaria. Therefore, In order to prevent human clonorchis sinensis infection and develop to chronic liver disease, we need to design and to apply good programs such as continuous health education, Prevention through personal hygiene improvement, active effective medical treatment for those infected with C. sinensis, and stop eating habit of resident not to eat raw freshwater fish.
This study investigate whether the factors of clonorchis sinensis infection among the residents in vicinity of Nakdong river and infection status with clonorchis sinensis metacercaria of fishes in the stream. In this study, we selected two regions around the midstream of Nakdong river and three regions around the upper stream of the river; collected freshwater fishes from the stream to examine their metacercarial infections; and studied the status and causes of clonorchis sinensis infection in 552 residents living within 5 kilometers from the river. Among the 552 residents studied, 13.8% of them are infected with C. sinensis The infection rate in man, 19.8%, is significantly higher than that in woman, 8.7%. According to regions selected, the infections rates in Andong, Uiseong, Mungyeong, Seongju, and Dalseong were 24.5%, 19.0%, 16.1%, 3.3%, and 6.2%, respectively, which indicates that the infection rates in residents living in upper stream areas are significantly higher than those of residents living in midstream area. Among 379 freshwater fishes of 20 species that were collected in the five regions, 41 fishes of 8 species were infected with clonorchis sinensis metacercaria. The freshwater fishes of clonorchis sinensis metacercaria infection rates caused by freshwater fishes that are known to the second intermediate hosts for C. sinensis are 30.6% in Andong region, 17.3% in Uiseong region, 8.6% in Seongju region, 5.7% in Mungyeong region, and 3.2% in Dalseong region. There is a highly positive correlation(by 0.795 correlation coefficient) between the C. sinensis infection rate in residents in the selected regions and fishes infected with clonorchis sinensis metacercaria in the stream (the relationship is defined as a linear regression model). However, there is no statistical significance among the regions because we have the data of only 5 regions. The study shows not only the fact that there is very high clonorchis sinensis infection rate in residents living in the midstream and upper stream of Nakdong river, but that many of freshwater fishes in the stream are infected with clonorchis sinensis metacercaria. Therefore, In order to prevent human clonorchis sinensis infection and develop to chronic liver disease, we need to design and to apply good programs such as continuous health education, Prevention through personal hygiene improvement, active effective medical treatment for those infected with C. sinensis, and stop eating habit of resident not to eat raw freshwater fish.
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