- Follow-up Study of Patients Previously Diagnosed with Lymphatic Filariasis in Korea
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Hyeng Il Cheun, Hee Eun Shin, Da Won Ma, Sung Hee Hong, Tae Yun Kim, Sang Eun Lee, JungWon Ju, Yun-Kyu Park, Tong-Soo Kim, Shin Hyeong Cho
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Osong Public Health Res Perspect. 2017;8(6):421-424. Published online December 31, 2017
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DOI: https://doi.org/10.24171/j.phrp.2017.8.6.10
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 Abstract
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- Objectives
Korea was an endemic area for lymphatic filariasis (LF), caused by the nematode parasite Brugia malayi, until the 1970s. The World Health Organization recognized Korea as LF-free in June 2008. However, it is necessary to confirm that patients that have had LF in the past still test negative, to prevent the re-emergence of LF in Korea. MethodsWe followed up a total of 83 patients who had been diagnosed with LF between 2002 and 2010 in endemic LF areas. ResultsFifty-two of the 83 subjects were negative for LF, whereas 31 subjects had re-located to a different city or province, were dead, or were unaccounted for. Most subjects with negative test results still exhibited edema in the legs or the arms, and some complained of redness and swelling in the legs or ankle joints. However, we found that these symptoms were due to diseases other than LF. ConclusionIn this follow-up study, we did not find any evidence indicating the potential re-emergence of LF in Korea.
- Prevalence of Clonorchis sinensis Infections Along the Five Major Rivers in Republic of Korea, 2007
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Hyun-Kyung Kim, Hyeng-Il Cheun, Byung-Suk Cheun, Ki-Yeon Lee, Tong-Soo Kim, Sang-Eun Lee, Won-ja Lee, Shin-Hyeong Cho
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Osong Public Health Res Perspect. 2010;1(1):43-49. Published online December 31, 2010
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DOI: https://doi.org/10.1016/j.phrp.2010.12.010
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1,240
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Abstract
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- Objectives
The prevalence of Clonorchis sinensis infection was investigated among residents of the five major river basins, that is, Hangang, Nakdonggang, Seomjingang, Yeongsangang, and Geumgang River basins in Korea.
Methods
From January to December 2007, a total of 31,268 stool samples were collected from 29 localities and examined by the formalin-ether sedimentation technique.
Results
Intestinal parasite eggs and/or protozoan cysts were detected from 2957 (9.5%) inhabitants. Number of residents harbouring helminth eggs in the faeces was 2542 (8.1%) for C. sinensis, 255 (0.8%) for Heterophyes spp., 36 (0.1%) for Echinostoma spp., 30 (0.1%) for Trichuris trichiura, 8 (0.03%) for Ascaris lumbricoides, 7 (0.02%) for Gymnophalloide seoi, and 50 (0.02%) for Trichostrongylus orientalis. Number of residents harbouring protozoan cysts in the faeces was 133 (1.3%) for Entamoeba spp. and 50 (0.2%) for Giardia lamblia. The positive rates of C. sinensis in Nakdonggang, Seomjingang, Yeongsangang, Geumgang, and Hangang River basins were 12.2%, 9.5%, 3.3%, 3.0%, and 1.0%, respectively. The egg positive rate of C. sinensis was higher in male (10.6%) than in female (6.1%), and the age group of 50s had the highest positive rate (10.4%).
Conclusion
The result of this study revealed little decrease in positive rate of C. sinensis compared with the result of southern endemic areas of Korea in 2006.
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