A SURVEY ON THE EPIDEMIOLOGICAL FACTORS OF CLONORCHIASIS IN THE POHANG INDUSTRIAL BELT ALONG THE HYUNGSAN RIVER KYONGSANGBUK-DO SOUTH KOREA
A SURVEY ON THE EPIDEMIOLOGICAL FACTORS OF CLONORCHIASIS IN THE POHANG INDUSTRIAL BELT ALONG THE HYUNGSAN RIVER KYONGSANGBUK-DO SOUTH KOREA
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DOI:
10.3347/kjp.1990.28.4.213
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发表时间:
1990-01-01
影响因子:
--
通讯作者:
HONG S-T
中科院分区:
文献类型:
--
作者:
KIM S S;HAN M H;HONG S-T
The employees at the Pohang industrial area, where Clonorchis sinensis has been known to be endemic along the Hyungsan River, were examined parasitologically for clonorchiasis and a part of the infected cases were surveyed with a questionaire to outline the recent infection status of C. sinensis and epidemiological parameters in the area. Total of 3,180 cases were tested by intradermal inoculation of C. sinensis antigen (Green Cross Co., Korea), and 834(26.2%) were found positive. Out of the positive cases, 598 were subjected to fecal examination for helminth ova. The examination revealed 129(21.6%) ova positive cases of C. sinensis, and Trichuris trichiura 1.7%, Ascaria lumbricoides 0.3%, and Metagonimus yokogawai 0.2%. The questionaire analysis showed some significant differences between the infected and noninfected(control) groups. The infected cases were less educated than the control, and they lived at the closer area to the river, and most of them lived there over 20 years. Also they preferred eating raw fresh water fish. Most of the detected cases were treated with praziquantel and found negative for the eggs in 85.3% of them 1 year after the treatment. The present data reveal markedly decreased endemicity of clonorchiasis compared with previous prevalence rates but still clonorchiasis is endemic in the Hyungsan river basin. A comprehensive measure including case detection, treatment and education for parasite control should be applied to control clonorchiasis in such endemic areas.