Osong Public Health and Research Perspectives

Brief Report

Follow-up Study of Patients Previously Diagnosed with Lymphatic Filariasis in Korea: 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; Osong Public Health Res Perspect. 2017;8(6):421-424. Published online December 31, 2017; DOI: https://doi.org/10.24171/j.phrp.2017.8.6.10

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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.

Methods

We followed up a total of 83 patients who had been diagnosed with LF between 2002 and 2010 in endemic LF areas.

Results

Fifty-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.

Conclusion

In this follow-up study, we did not find any evidence indicating the potential re-emergence of LF in Korea.

Citations

Citations to this article as recorded by

Lymphatic filariasis in Asia: a systematic review and meta-analysis
Negar Bizhani, Saeideh Hashemi Hafshejani, Neda Mohammadi, Mehdi Rezaei, Mohammad Bagher Rokni
Parasitology Research.2021; 120(2): 411. CrossRef
Status of common parasitic diseases in Korea in 2019
Sun Huh
Journal of the Korean Medical Association.2019; 62(8): 437. CrossRef

Original Article

Prevalence and Risk Factors of Clonorchiasis among the Populations Served by Primary Healthcare Posts along Five Major Rivers in South Korea: Kyung Ja June, Shin Hyeong Cho, Won Ja Lee, Chunmi Kim, Kyung-Soon Park; Osong Public Health Res Perspect. 2013;4(1):21-26. Published online February 28, 2013; DOI: https://doi.org/10.1016/j.phrp.2012.12.002

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Abstract PDF

Objectives
Clonorchiasis is an infectious disease caused by the Chinese liver fluke Clonorchis sinensis. In this study, we investigated the prevalence and risk factors of clonorchiasis among the populations served by primary healthcare posts along five major rivers in South Korea.
Methods
Forty primary healthcare posts that are located less than 5 km from one of the five rivers were selected from 26 counties. For the purpose of the survey, community health practitioners selected the nearest villages from the riversides in their own catchment area. From January to May 2009, a total of 2788 stool samples were collected and examined using the formalin–ether sedimentation technique. Village inhabitants were also interviewed by means of questionnaires in order to obtain information on potential risk factors.
Results
The prevalence rates of clonorchiasis at various river basins were as follows: Seomjin River, 21.3%; Nakdong River, 13.5%; Geum River, 9.2%; Han River, 7.6%; and Yeongsan River, 4.9%. The total number of people infected with C. sinensis was 329 (11.3%). By gender, 14.3% of males and 7.6% of females were infected. In case of both males and females, the prevalence rate was highest in those in their 40s. Consumption of raw freshwater fish was confirmed as a risk factor based on a logistic regression analysis.
Conclusion
The present findings suggest that clonorchiasis is still highly prevalent among the inhabitants of riverside areas in southern Korea, and, accordingly, it is necessary to implement a systematic control program in the endemic areas.

Citations

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Infection Characteristics of Clonorchis sinensis Metacercariae in Fish from Republic of Korea
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Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Cheon-Hyeon Kim, Min-Ah Hwang, Kyeong-Woo No, Jai-Dong Kim
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Prevalence and Infection Intensity of Zoonotic Trematode Metacercariae in Fish from Soyang-cheon (Stream), in Wanju-gun, Jeollabuk-do, Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Jung-Won Ju, Cheon-Hyeon Kim, Min-Ah Hwang, Kyeong-Woo No, Jong-Ho Park
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Survey of Zoonotic Trematode Metacercariae in Fish from Irrigation Canal of Togyo-jeosuji (Reservoir) in Cheorwon-gun, Gangwon-do, Republic of Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Hee Il Lee, Jung-Won Ju, Myoung-Ro Lee, Eun-Joo Lim, Sung Yong Son, Eunmi Ko, Jaeseok Choi
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Endemicity of Zoonotic Trematode Metacercariae in Fish from Deokcheon-gang (River) in Sancheong-gun, Gyeongsangnam-do, Republic of Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Hee Il Lee, Jung-Won Ju, Myoung-Ro Lee, Jeong-Gil Park, Jihee Ahn
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Ting-Jun Zhu, Ying-Dan Chen, Men-Bao Qian, Hui-Hui Zhu, Ji-Lei Huang, Chang-Hai Zhou, Xiao-Nong Zhou
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Sang-Eun Lee, Hee-Eun Shin, Myoung-Ro Lee, Yang-Hee Kim, Shin-Hyeong Cho, Jung-Won Ju
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Prevalence and Related Factors of Clonorchiasis among Five Major Riverside Residents in South Korea
Chunmi Kim, Kyung Ja June, Shin Hyeong Cho, Kyung Soon Park, Hung Sa Lee, Ji Yeon Park
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Prevalence and Risk Factors of Clonorchiasis among Residents of Riverside Areas in Muju-gun, Jeollabuk-do, Korea
Do-Soon Park, Sung-Jin Na, Shin Hyeong Cho, Kyung Ja June, Young-Chae Cho, Young-Ha Lee
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Effects of a Clonorchiasis Prevention Education Program for Clonorchiasis Prevention Lecturers
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Articles

Spatial and Temporal Distribution of Plasmodium vivax Malaria in Korea Estimated with a Hierarchical Generalized Linear Model: Maengseok Noh, Youngjo Lee, Seungyoung Oh, Chaeshin Chu, Jin Gwack, Seung-Ki Youn, Shin Hyeong Cho, Won Ja Lee, Sun Huh; Osong Public Health Res Perspect. 2012;3(4):192-198. Published online December 31, 2012; DOI: https://doi.org/10.1016/j.phrp.2012.11.003

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Abstract PDF

Objectives
The spatial and temporal correlations were estimated to determine Plasmodium vivax malarial transmission pattern in Korea from 2001–2011 with the hierarchical generalized linear model.
Methods
Malaria cases reported to the Korea Centers for Disease Control and Prevention from 2001 to 2011 were analyzed with descriptive statistics and the incidence was estimated according to age, sex, and year by the hierarchical generalized linear model. Spatial and temporal correlation was estimated and the best model was selected from nine models. Results were presented as diseases map according to age and sex.
Results
The incidence according to age was highest in the 20–25-year-old group (244.52 infections/100,000). Mean ages of infected males and females were 31.0 years and 45.3 years with incidences 7.8 infections/100,000 and 7.1 infections/100,000 after estimation. The mean month for infection was mid-July with incidence 10.4 infections/100,000. The best-fit model showed that there was a spatial and temporal correlation in the malarial transmission. Incidence was very low or negligible in areas distant from the demilitarized zone between Republic of Korea and Democratic People’s Republic of Korea (North Korea) if the 20–29-year-old male group was omitted in the diseases map.
Conclusion
Malarial transmission in a region in Korea was influenced by the incidence in adjacent regions in recent years. Since malaria in Korea mainly originates from mosquitoes from North Korea, there will be continuous decrease if there is no further outbreak in North Korea.

Citations

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Surveillance and Vector Control of Lymphatic Filariasis in the Republic of Korea: Shin Hyeong Cho, Da Won Ma, Bo Ra Koo, Hee Eun Shin, Wook Kyo Lee, Byong Suk Jeong, Chaeshin Chu, Won Ja Lee, Hyeng Il Cheun; Osong Public Health Res Perspect. 2012;3(3):145-150. Published online June 30, 2012; DOI: https://doi.org/10.1016/j.phrp.2012.07.008

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Abstract PDF

Objectives
Until the early 2000s, lymphatic filariasis would commonly break out in the coastal areas in Korea. Through steady efforts combining investigation and treatment, filariasis was officially declared eradicated in 2008. This study surveyed the density of vector species of filariasis in past endemic areas, and inspected filariasis DNA from collected mosquitoes for protection against the reemergence of filariasis.
Methods
Between May and October 2009, mosquitoes were caught using the black night trap in past endemic coastal areas: Gyeongsangnam-do, Jeollanamdo, and Jeju-do. The collected mosquitoes were identified, and the extracted DNA from the collected vector mosquitoes was tested by polymerase chain reaction for Brugia malayi filariasis.
Results
Ochletotatus togoi, Anophel es (Hyrcanus) group and Culex pipiens were most frequently caught in Jeollanam-do (Geomun Island, Bogil Island, Heuksan Island), Jeju-do (Namone-ri, Wimi-ri). and Gyeongsangnam-do (Maemul Island). DNA of B malayi was not found in Och Togoi and An (Hyrcanus) group as main vectors of filariasis.
Conclusion
Lymphatic filariasis was not found in the vector mosquitoes collected in past endemic areas. However, considering that the proportion of vector species is quite high, there is a potential risk that filariasis could be reemerging through overseas travel or trade. Thus, there is a need to continuously monitor vector mosquitoes of lymphatic filariasis.

Citations

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Young Yil Bahk, Eun-Hee Shin, Shin-Hyeong Cho, Jung-Won Ju, Jong-Yil Chai, Tong-Soo Kim
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