- 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.
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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
- mRNA vaccine effectiveness against SARS-CoV-2 B.1.617.2 (Delta) and B.1.1.529 (Omicron) variant transmission from home care cases to household contacts in South Korea
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Hanul Park, Young Joon Park, Sang Eun Lee, Min Jei Lee, Hyungtae Ahn
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Received September 1, 2022 Accepted November 1, 2022 Published online November 28, 2022
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DOI: https://doi.org/10.24171/j.phrp.2022.0243
[Epub ahead of print]
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Abstract
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- Objectives
Household contacts of confirmed cases of coronavirus disease 2019 (COVID-19) are exposed to a high risk of viral transmission, and secondary incidence is an important indicator of community transmission. This study analyzed the secondary attack rate and mRNA vaccine effectiveness against transmission (VET) for index cases (patients treated at home) confirmed to be infected with the Delta and Omicron variants.
Methods
The subjects of the study were 4,450 index cases and 10,382 household contacts. Logistic regression analysis was performed to compare the secondary attack rate by vaccination status, and adjusted relative risk and 95% confidence intervals were identified.
Results
The secondary attack rate of the Delta variant was 27.3%, while the secondary attack rate of the Omicron variant was 29.8%. For the Delta variant, groups with less than 90 days and more than 90 days after 2 doses of mRNA vaccination both showed a VET of 37%. For the Omicron variant, a 64% VET was found among those with less than 90 days after 2 doses of mRNA vaccination.
Conclusion
This study provides useful data on the secondary attack rate and VET of mRNA vaccines for household contacts of COVID-19 cases in South Korea.
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