Parasites, Hosts and Diseases

"Cheong-Ha Yun"

Brief Communication

Current Status of Human Taeniasis in Lao People's Democratic Republic: Hyeong-Kyu Jeon, Tai-Soon Yong, Woon-Mok Sohn, Jong-Yil Chai, Duk-Young Min, Cheong-Ha Yun, Han-Jong Rim, Tiengkham Pongvongsa, Virasack Banouvong, Bounnaloth Insisiengmay, Bounlay Phommasack, Keeseon S. Eom; Korean J Parasitol 2013;51(2):259-263.
Published online April 25, 2013; DOI: https://doi.org/10.3347/kjp.2013.51.2.259

Abstract
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Human taeniasis was investigated in Lao People's Democratic Republic (Lao PDR) between 2000 and 2011 as part of the nation's helminthiasis survey. A total of 55,038 inhabitants, including 29,846 school children, were examined using the Kato-Katz and scotch-tape anal swab method, and morphological observation of adult worms. Molecular identification of Taenia tapeworms was performed by multiplex PCR or DNA sequence analysis of the mitochondrial cox1 gene. Taenia eggs were present at a rate of 1.5% (845/55,038) in the subject population. Adult tapeworms were identified as T. solium or T. saginata by analyzing the collectable stool specimens (n=126). Three specimens identified as T. solium were found in Luang Prabang, while the remaining 123 specimens, which were T. saginata, were found in Bokeo, Bolikhamxay, Champasak, Houaphan, Khammouane, Luang Namta, Luang Prabang, Oudomxay, Phongsaly, Saysomboune, Saravane, Savannakhet, Xayaboury, Xekong, Xieng Khouang Province, and Vientiane Municipality.

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Original Article

Serologic Survey of Toxoplasmosis in Seoul and Jeju-do, and a Brief Review of Its Seroprevalence in Korea: Hyemi Lim, Sang-Eun Lee, Bong-Kwang Jung, Min-Ki Kim, Mi Youn Lee, Ho-Woo Nam, Jong-Gyun Shin, Cheong-Ha Yun, Han-Ik Cho, Eun-Hee Shin, Jong-Yil Chai; Korean J Parasitol 2012;50(4):287-293.
Published online November 26, 2012; DOI: https://doi.org/10.3347/kjp.2012.50.4.287

Abstract
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Knowledge of the prevalence of human Toxoplasma gondii infection is required in the Republic of Korea. In this study, we surveyed the seroprevalence of T. gondii infection and analyzed the risk factors associated with seropositivity among residents in 2 administrative districts; Seoul and the island of Jeju-do, which have contrasting epidemiologic characteristics. Sera and blood collected from 2,150 residents (1,114 in Seoul and 1,036 in Jeju-do) were checked for IgG antibody titers using ELISA and for the T. gondii B1 gene using PCR. In addition, participants completed a questionnaire that solicited information on gender, age, occupation, eating habits, history of contact with animals, and travel abroad. The T. gondii B1 gene was not detected in all residents examined. However, ELISA showed 8.0% (89 of 1,114 sera) positive for IgG antibodies against T. gondii in Seoul and 11.3% (117 of 1,036 sera) in Jeju-do. In both districts, the positive rates were higher in males than in females, and those 40-79 years of age showed higher rates than other ages. In Seoul, residents older than 70 years of age showed the highest positive rate, 14.9%, whereas in Jeju-do the highest prevalence, 15.6%, was in those in their sixties. The higher seropositive rate in Jeju-do than in Seoul may be related to eating habits and occupations. The present results and a review of related literature are indicative of an increased seroprevalence of T. gondii in Korea in recent years.

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