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Phylogenetic Relationships of 3 Korean Neodiplostomum Species (Digenea: Neodiplostomidae) Based on Partial CO1 Gene: Kyoung-Ho Pyo, Jo Woon Yi Lee, Jin-Ju Lee, Yun-Kyu Park, Eun-Hee Shin, Jong-Yil Chai; Korean J Parasitol 2014;52(3):325-329.
Published online June 26, 2014; DOI: https://doi.org/10.3347/kjp.2014.52.3.325

Abstract
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The phylogenetic relationships of the 3 Neodiplostomum spp. (Digenea: Neodiplostomidae) occurring in Korea (N. seoulense, N. leei, and N. boryongense) were analyzed using the partial mitochondrial cytochrome c oxidase subunit 1 (CO1) gene. The adult flukes were recovered from Sprague-Dawley rats (N. seoulense) and newborn chicks (N. leei and N. boryongense) experimentally infected with the neodiplostomula from the grass snake, Rhabdophis tigrinus tigrinus. The genomic DNA was amplified using specific primers, and the sequence of CO1 was obtained. According to the results, the pairwise similarity was 96.1% between N. boryongense and N. seoulense, but was 95.0% between N. boryongense and N. leei and 94.2% between N. leei and N. seoulense. The results demonstrated a closer phylogenetic relationship between N. seoulense and N. boryongense. This high relationship of N. seoulense and N. boryongense may be related to their similar morphologic features including the limited distribution of vitellaria and the presence of a genital cone. N. leei is distinct on the other hand with an extensive distribution of vitellaria and the absence of a genital cone.

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Neodiplostomum cf. seoulense (Seo, Rim, Lee, 1964) sensu Pyo et al., 2014 (Trematoda: Diplostomidae Poirier, 1886): morphology, life cycle, and phylogenetic relationships
A. V. Izrailskaia, V. V. Besprozvannykh
Journal of Helminthology.2023;[Epub] CrossRef
Paraphyly of Conodiplostomum Dubois, 1937
Petr Heneberg, Jiljí Sitko, Miroslav Těšínský
Parasitology International.2020; 76: 102033. CrossRef
New data on Neodiplostomum americanum Chandler and Rausch, 1947 (Digenea: Diplostomidae), in the Great Horned Owl Bubo virginianus Gmelin, 1788 and the Eastern Screech Owl Megascops asio Linnaeus, 1758 in Mississippi, USA
Ethan T. Woodyard, Thomas G. Rosser, Matt J. Griffin
Parasitology Research.2017; 116(8): 2075. CrossRef

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No Detection of Severe Fever with Thrombocytopenia Syndrome Virus from Ixodid Ticks Collected in Seoul: Heejin Ham, Sukju Jo, Jungim Jang, Sungmin Choi; Korean J Parasitol 2014;52(2):221-224.
Published online April 18, 2014; DOI: https://doi.org/10.3347/kjp.2014.52.2.221

Abstract
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Larvae, nymphs, and adult stages of 3 species of ixodid ticks were collected by tick drag methods in Seoul during June-October 2013, and their infection status with severe fever with thrombocytopenia syndrome (SFTS) virus was examined using RT-PCR. During the period, 732 Haemaphysalis longicornis, 62 Haemaphysalis flava, and 2 Ixodes nipponensis specimens were collected. Among the specimens of H. longicornis, the number of female adults, male adults, nymphs, and larvae were 53, 11, 240, and 446, respectively. Ticks were grouped into 63 pools according to the collection site, species, and developmental stage, and assayed for SFTS virus. None of the pools of ticks were found to be positive for SFTS virus gene.

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Severe fever with thrombocytopenia syndrome virus from ticks: a molecular epidemiological study of a patient in the Republic of Korea
Seong Yoon Kim, Choong Won Seo, Hee Il Lee
Experimental and Applied Acarology.2023; 89(2): 305. CrossRef
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Nan Zhang, Xiao-Qing Cheng, Bin Deng, Jia Rui, Luxia Qiu, Zeyu Zhao, Shengnan Lin, Xingchun Liu, Jingwen Xu, Yao Wang, Meng Yang, Yuanzhao Zhu, Jiefeng Huang, Chan Liu, Weikang Liu, Li Luo, Zhuoyang Li, Peihua Li, Tianlong Yang, Zhi-Feng Li, Shu-Yi Liang,
Parasites & Vectors.2021;[Epub] CrossRef
Hard Ticks as Vectors Tested Negative for Severe Fever with Thrombocytopenia Syndrome in Ganghwa-do, Korea during 2019-2020
Kyoung Jin, Yeon-Ja Koh, Seong Kyu Ahn, Joonghee Cho, Junghwan Lim, Jaeyong Song, Jinyoung Lee, Young Woo Gong, Mun Ju Kwon, Hyung Wook Kwon, Young Yil Bahk, Tong-Soo Kim
The Korean Journal of Parasitology.2021; 59(3): 281. CrossRef
Vectors, Hosts, and the Possible Risk Factors Associated with Severe Fever with Thrombocytopenia Syndrome
Jin-Na Wang, Tian-Qi Li, Qin-Mei Liu, Yu-Yan Wu, Ming-Yu Luo, Zhen-Yu Gong, Marco Di Luca
Canadian Journal of Infectious Diseases and Medical Microbiology.2021; 2021: 1. CrossRef
Tick‐borne viruses: Current trends in large‐scale viral surveillance
Ki Beom Park, Yong Hun Jo, Nam‐Yeon Kim, Wook‐Gyo Lee, Hee‐Il Lee, Shin‐Hyeong Cho, Bharat Bhusan Patnaik, Yeon Soo Han
Entomological Research.2020; 50(8): 379. CrossRef
Distribution of Tick Vectors of Severe Fever with Thrombocytopenia Syndrome Virus (SFTSV) Collected from Four Environments in Jeju
Kyoung A Chung, Hyeon Je Song, Hyeok Jae Lee, Chul Park, Min Yeung Seo
The Korean Journal of Clinical Laboratory Science.2020; 52(4): 356. CrossRef
Prevalence of Severe Fever with Thrombocytopenia Syndrome Virus in Ticks Collected from National Parks in Korea
Young-Sun Jo, Jun-Gu Kang, Jeong-Byoung Chae, Yoon-Kyoung Cho, Jeong-Hwa Shin, Weon-Hwa Jheong, Joon-Seok Chae
Vector-Borne and Zoonotic Diseases.2019; 19(4): 284. CrossRef
Four Year Surveillance of the Vector Hard Ticks for SFTS, Ganghwa-do, Republic of Korea
Myung-Deok Kim-Jeon, Seung Jegal, Hojong Jun, Haneul Jung, Seo Hye Park, Seong Kyu Ahn, Jinyoung Lee, Young Woo Gong, Kwangsig Joo, Mun Ju Kwon, Jong Yul Roh, Wook-Gyo Lee, Young Yil Bahk, Tong-Soo Kim
The Korean Journal of Parasitology.2019; 57(6): 691. CrossRef
Distribution of ticks carrying Severe Fever with Thrombocytopenia Syndrome Virus (SFTSV) around Jiri walking trails of Jeollanam-do, Korea
Byung Joon Song, Hyun Cheol Lim, Tae Man Ha, Doo Yung Jeon, Soo In Yang, Hyeon Je Song
Korean Journal of Veterinary Service.2016; 39(2): 75. CrossRef
Pathogenic potential and growth kinetics of Muko virus in mice and human-derived cells
Gianne Eduard L. Ulanday, Satoshi Shimada, Ngwe Tun Mya Myat, Takeshi Nabeshima, Kouichi Morita, Daisuke Hayasaka
Tropical Medicine and Health.2016;[Epub] CrossRef
Haemaphysalis longicornisTicks as Reservoir and Vector of Severe Fever with Thrombocytopenia Syndrome Virus in China
Li-Mei Luo, Li Zhao, Hong-Ling Wen, Zhen-Tang Zhang, Jian-Wei Liu, Li-Zhu Fang, Zai-Feng Xue, Dong-Qiang Ma, Xiao-Shuang Zhang, Shu-Jun Ding, Xiao-Ying Lei, Xue-jie Yu
Emerging Infectious Diseases.2015; 21(10): 1770. CrossRef
Epidemiological Survey of Severe Fever with Thrombocytopenia Syndrome Virus in Ticks in Nagasaki, Japan
Daisuke Hayasaka, Satoshi Shimada, Kotaro Aoki, Yuki Takamatsu, Leo Uchida, Masahiro Horio, Yu Fuxun, Kouichi Morita
Tropical Medicine and Health.2015; 43(3): 159. CrossRef

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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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Scientific Reports.2022;[Epub] CrossRef
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Oyetunde T. Oyeyemi, Ifeoluwa T. Oyeyemi, Isaac A. Adesina, Adebisi M. Tiamiyu, Yinka D. Oluwafemi, Roseangela I. Nwuba, Rafaella F. Q. Grenfell
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Brief Communication

Depressed Neuronal Growth Associated Protein (GAP)-43 Expression in the Small Intestines of Mice Experimentally Infected with Neodiplostomum seoulense: Kyoung-Ho Pyo, Eun-Young Kang, Bong-Kwang Jung, Jung-Ho Moon, Jong-Yil Chai, Eun-Hee Shin; Korean J Parasitol 2012;50(1):89-93.
Published online March 6, 2012; DOI: https://doi.org/10.3347/kjp.2012.50.1.89

Abstract
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Neodiplostomum seoulense (Digenea: Neodiplostomidae) is an intestinal trematode that can cause severe mucosal pathology in the small intestines of mice and even mortality of the infected mice within 28 days after infection. We observed neuronal growth associated protein-43 (GAP-43) expression in the myenteric plexus of the small intestinal wall of N. seoulense-infected mice until day 35 post-infection (PI). BALB/c mice were infected with 200 or 500 N. seoulense metacercariae isolated from naturally infected snakes and were killed every 7 days for immunohistochemical demonstration of GAP-43 in the small intestines. N. seoulense-infected mice showed remarkable dilatation of intestinal loops compared with control mice through days 7-28 PI. Conversely, GAP-43 expression in the mucosal myenteric plexus was markedly (P<0.05) reduced in the small intestines of N. seoulense-infected mice during days 7-28 PI and was slightly normalized at day 35 PI. From this study, it is evident that neuronal damage occurs in the intestinal mucosa of N. seoulense-infected mice. However, the correlation between intestinal pathology, including the loop dilatation, and depressed GAP-43 expression remains to be elucidated.

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Enhanced serotonin signaling increases intestinal neuroplasticity
Chasen J. Greig, Neeru Gandotra, John J. Tackett, Michaela C. Bamdad, Robert A. Cowles
Journal of Surgical Research.2016; 206(1): 151. CrossRef

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Original Articles

A Ten-year Survey of Giardia Cysts in Drinking Water Supplies of Seoul, the Republic of Korea: Mok-Young Lee, Eun-Joo Cho, Jin-Hyo Lee, Sun-Hee Han, Yong-Sang Park; Korean J Parasitol 2011;49(1):9-15.
Published online March 18, 2011; DOI: https://doi.org/10.3347/kjp.2011.49.1.9

Abstract
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To understand the distribution of Giardia cysts in drinking water supplies in Seoul, Korea, we collected water samples quarterly at 6 intakes in the Han River, its largest stream and 6 conventional water treatment plants (WTPs) serving drinking water, from 2000 to 2009. Giardia cysts in each of 10 L water were confirmed in 35.0% of intake water samples and the arithmetic mean was 1.65 cysts/10 L (range 0-35 cysts/10 L). The lowest cyst density was observed at Paldang and Kangbuk intakes, and the pollution level was higher at 4 intakes downstream. It seemed that these 4 intakes were under influence of Wangsuk stream at the end of which cysts were found in all samples with the mean of 140 cysts/10 L. The annual mean number of cysts was 0.21-4.21 cysts/10 L, and the cyst level at the second half of the 10 years was about 1/5 of that at first half on average. The cysts were more frequently found in winter, and their mean density was 3.74 cysts/10 L in winter and 0.80-1.08 cysts/10 L in other seasons. All finished water samples collected at 6 WTPs were negative for Giardia in each of 100 L sample for 10 years and cyst removal by physical process was average 2.9-log. It was concluded that conventional water treatment at 6 WTPs of Seoul appears to remove the cysts effectively under the present level of their source water. Domestic wastewater from the urban region could be an important source of Giardia pollution in the river.

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Haeseung Lee, Dongmi Kwak
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Mark Raymond A. Vejano, Laurice Beatrice Raphaelle O. dela Peña, Windell L. Rivera
Environmental Monitoring and Assessment.2021;[Epub] CrossRef
Multilocus genotyping of Giardia duodenalis from pigs in Korea
Haeseung Lee, ByeongYeal Jung, Jun-Sik Lim, Min-Goo Seo, Seung-Hun Lee, Kwang-Ho Choi, Mi-Hye Hwang, Tae-Hwan Kim, Oh-Deog Kwon, Dongmi Kwak
Parasitology International.2020; 78: 102154. CrossRef
Multilocus genotyping and risk factor analysis of Giardia duodenalis in dogs in Korea
Ha-Young Kim, Haeseung Lee, Seung-Hun Lee, Min-Goo Seo, Seonju Yi, Jong Wan Kim, Chung Hyun Kim, Yu-Ran Lee, ByungJae So, Oh-Deog Kwon, Dongmi Kwak
Acta Tropica.2019; 199: 105113. CrossRef
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Young Yil Bahk, Pyo Yun Cho, Sung Kyu Ahn, Sangjung Park, Won Hwa Jheong, Yun-Kyu Park, Ho-Joon Shin, Sang-Seob Lee, Okjae Rhee, Tong-Soo Kim
The Korean Journal of Parasitology.2018; 56(2): 205. CrossRef
Prevalence and molecular characterisation of Giardia duodenalis in calves with diarrhoea
S. H. Lee, D. VanBik, H. Y. Kim, A. Cho, J. W. Kim, J. W. Byun, J. K. Oem, S. I. Oh, D. Kwak
Veterinary Record.2016; 178(25): 633. CrossRef
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The Korean Journal of Medicine.2015; 89(3): 312. CrossRef
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Hyeng-Il Cheun, Byung-Suk Chung, Da-Won Ma, Bo-La Goo, Shin-Hyeong Cho, Mi-jung Ji, Won-Ja Lee
Osong Public Health and Research Perspectives.2013; 4(3): 146. CrossRef

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A Survey of Cryptosporidium Oocysts in Water Supplies during a 10-Year Period (2000-2009) in Seoul: Mok Young Lee, Eun Joo Cho, Jin Hyo Lee, Sun Hee Han, Yong Sang Park; Korean J Parasitol 2010;48(3):219-224.
Published online September 16, 2010; DOI: https://doi.org/10.3347/kjp.2010.48.3.219

Abstract
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This study has been conducted to estimate the occurrence of Cryptosporidium oocysts in water supplies in the Metropolitan area of Seoul, South Korea, for 10 years from 2000 to 2009. Water samples were collected quarterly at 6 intakes in the Han River and its largest stream and 6 conventional Water Treatment Plants (WTPs) serving drinking water for 10 million people of Seoul. Cryptosporidium oocysts were found in 22.5% of intake water samples and arithmetic mean was 0.65 oocysts/10 L (range 0-22 oocysts/10 L). Although the annual mean of oocyst number was as low as 0.04-1.90 oocysts/10 L, 3 peaks in 2004 and 2007 were observed and the pollution level was a little higher in winter. The lowest density was observed at Paldang intake and the pollution level increased at Kuui and Jayang intakes. At the end of the largest stream, oocysts were found in 70% of collected samples (mean 5.71 oocysts/10 L) and it seemed that its joining the Han River resulted in the increase at Kuui intake and downstream. Oocyst removal by physical process exceeded 2.0-2.3 log and then all finished water samples collected at 6 WTPs were negative for Cryptosporidium in each 100 L sample for 10 years. These results suggested that domestic wastewater from the urban region could be a source of Cryptosporidium pollution and separating sewage systems adjacent to the intakes could be meaningful for some intakes having weakness related to parasitological water quality.

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The Korean Journal of Parasitology.2019; 57(5): 531. CrossRef
Monitoring of Noxious Protozoa for Management of Natural Water Resources
Young Yil Bahk, Pyo Yun Cho, Sung Kyu Ahn, Sangjung Park, Won Hwa Jheong, Yun-Kyu Park, Ho-Joon Shin, Sang-Seob Lee, Okjae Rhee, Tong-Soo Kim
The Korean Journal of Parasitology.2018; 56(2): 205. CrossRef
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Yadong Kong, Ping Lu, Tao Yuan, Jinghui Niu, Zhaoji Li, Baisong Yang
Canadian Journal of Infectious Diseases and Medical Microbiology.2017; 2017: 1. CrossRef
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Seobo Sim, Jua Won, Jae-Whan Kim, Kyungjin Kim, Woo-Yoon Park, Jae-Ran Yu
The Korean Journal of Parasitology.2017; 55(2): 137. CrossRef
Development of a Diagnostic Kit to Detect Cryptosporidium parvum and Giardia lamblia
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Osong Public Health and Research Perspectives.2013; 4(3): 146. CrossRef
Health Risk Assessment of Cryptosporidium in Tap Water in Korea
Mok-Young Lee, Sang-Jung Park, Eun-Joo Cho, Su-Jeong Park, Sun-Hee Han, Oh-Sang Kwon
Korean Journal of Environmental Health Sciences.2013; 39(1): 32. CrossRef
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The Korean Journal of Parasitology.2013; 51(4): 461. CrossRef
A Ten-year Survey ofGiardia Cystsin Drinking Water Supplies of Seoul, the Republic of Korea
Mok-Young Lee, Eun-Joo Cho, Jin-Hyo Lee, Sun-Hee Han, Yong-Sang Park
The Korean Journal of Parasitology.2011; 49(1): 9. CrossRef

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Brief Communication

Antibody Responses in Sera of Different Mouse Strains Experimentally Infected with Neodiplostomum seoulense: Eun-Taek Han, Jun-Hu Chen, Jong-Yil Chai; Korean J Parasitol 2008;46(4):279-283.
Published online December 20, 2008; DOI: https://doi.org/10.3347/kjp.2008.46.4.279

Abstract
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To examine humoral immune responses in the host, we measured serum antibody levels in different strains of mice (ICR, BALB/c, and C3H) experimentally infected with Neodiplostomum seoulense. Specific IgG antibody levels were increased remarkably with little difference among 3 strains of mice infected with N. seoulense from day 7 to 35 post-infection. More target proteins of adult parasites reacted with IgG at the time when the worm recovery decreased compared with other times. More than 20 protein bands, from 14 kDa to 94 kDa in size, were separated from the crude antigen of N. seoulense adults by SDS-PAGE, and among them 26, 30, 35, 43, 54, 67, and 94 kDa proteins were the major antigenic proteins. The results suggest that significant IgG antibody responses occur against N. seoulense in mice and this may be related with expulsion of worms.

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Foodborne Intestinal Flukes in Southeast Asia
Jong-Yil Chai, Eun-Hee Shin, Soon-Hyung Lee, Han-Jong Rim
The Korean Journal of Parasitology.2009; 47(Suppl): S69. CrossRef

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Case Report

Reemergence of the bedbug Cimex lectularius in Seoul, Korea: In-Yong Lee, Han-Il Ree, Song-Jun An, John Alderman Linton, Tai-Soon Yong; Korean J Parasitol 2008;46(4):269-271.
Published online December 20, 2008; DOI: https://doi.org/10.3347/kjp.2008.46.4.269

Abstract
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A healthy 30-yr-old woman carrying an insect that had been caught in her living room visited the International Clinic at Severance Hospital, Seoul, in December 2007. The insect she brought was identified to be a nymph of a bedbug, Cimex lectularius, and her skin rashes looked typical bedbug's bites. Her apartment was investigated, and a dead body of a bedbug, cast skins, and hatched eggs were found in her rooms and neighbors' rooms in the same building. She was living in that apartment in Seoul for 9 months since she had moved from New Jersey, USA. We assume that the bedbugs were introduced from abroad, since there had been no report on bedbugs in Seoul for more than 2 decades at least. This is a report of a reemergence of the common bedbug, C. lectularius in Seoul, Korea.

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Brief Communication

Apodemus agrarius as a new definitive host for Neodiplostomum seoulense: Jong-Yil Chai, Jae-Hwan Park, Sang-Mee Guk, Jae-Lip Kim, Hyo-Jin Kim, Won-Hee Kim, Eun-Hee Shin, Terry A. Klein, Heung-Chul Kim, Sung-Tae Chong, Jin-Won Song, Luck-Ju Baek; Korean J Parasitol 2007;45(2):157-161.
Published online June 20, 2007; DOI: https://doi.org/10.3347/kjp.2007.45.2.157

Abstract
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A total of 1,496 rodents and insectivores were live-trapped at Yeoncheon-gun (n = 351), Paju-shi (804), and Pocheon-gun (343), Gyeonggi-do (Province), and examined for intestinal helminths, including Neodiplostomum seoulense, seasonally from December 2004 to September 2005. Six species of rodents, including Apodemus agrarius (1,366), Mus musculus (32), Micronytus fortis (28), Eothenomys regulus (9), Micronys minutus (6), and Cricetulus triton (3), and 1 species of insectivores Crocidura lasiura (54) were collected. A total of 321 adult N. seoulense were collected from 19 (1.4%) A. agrarius. The worm burden ranged from 1 to 101 per A. agrarius (mean; 16.9). No N. seoulense was observed in other rodent or insectivore species examined. The infection rate during autumn (4.5%) was higher than those during spring (0.8%), summer (0.8%), and winter (0.5%). The average number of N. seoulense in infected A. agrarius was the highest in spring (66.0 specimens), followed by autumn (15.2), winter (4.5), and summer (3.3). This study first confirms that A. agrarius is a natural definitive host for N. seoulense, and demonstrates that the infection rates and intensities vary seasonally and geographically.

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The genetic structure of populations of Isthmiophora melis (Schrank, 1788) (Digenea: Echinostomatidae). Does the host’s diet matter?
Grzegorz Zaleśny, Gerard Kanarek, Ewa Pyrka, Marta Kołodziej-Sobocińska, Andrzej Zalewski, Joanna Hildebrand
Parasites & Vectors.2023;[Epub] CrossRef
Neodiplostomum cf. seoulense (Seo, Rim, Lee, 1964) sensu Pyo et al., 2014 (Trematoda: Diplostomidae Poirier, 1886): morphology, life cycle, and phylogenetic relationships
A. V. Izrailskaia, V. V. Besprozvannykh
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Woon-Mok Sohn, Byoung-Kuk Na, Hyeon-Je Song, Chung-Mo Kim, Gi-Jin Nam
The Korean Journal of Parasitology.2014; 52(4): 419. CrossRef
Trematodes Recovered in the Small Intestine of Stray Cats in the Republic of Korea
Jong-Yil Chai, Young Yil Bahk, Woon-Mok Sohn
The Korean Journal of Parasitology.2013; 51(1): 99. CrossRef
Ecological surveillance of small mammals at Dagmar North Training Area, Gyeonggi Province, Republic of Korea, 2001-2005
Heung Chul Kim, Terry A. Klein, Hae Ji Kang, Se Hun Gu, Sung Sil Moon, Luck Ju Baek, Sung Tae Chong, Monica L. O'Guinn, John S. Lee, Michael J. Turell, Jin-Won Song
Journal of Vector Ecology.2011; 36(1): 42. CrossRef
Echinostome Infections in the Striped-Field Mouse, Apodemus agrarius, and the Ussuri White-Toothed Shrew, Crocidura lasiura, Caught Near the Demilitarized Zone, Gyeonggi-do (Province), Republic of Korea
Jong-Yil Chai, Jae-Hwan Park, Bong-Kwang Jung, Sang-Mee Guk, Jae-Lip Kim, Eun-Hee Shin, Terry A. Klein, Heung-Chul Kim, Sung-Tae Chong, Luck Ju Baek, Jin-Won Song
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Journal of Vector Ecology.2008; 33(2): 370. CrossRef

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Original Articles

Complement-mediated tail degradation of Neodiplostomum seoulense cercariae: Yun-Kyu Park, Myung-Ki Hwang, Yun-Jung Jung; Korean J Parasitol 2006;44(2):127-131.
Published online June 20, 2006; DOI: https://doi.org/10.3347/kjp.2006.44.2.127

Abstract
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The furcocercus cercariae of Neodiplostomum seoulense (Digenea: Neodiplostomidae) penetrate the skins of tadpoles and shed their tails. The speculated mechanism of this tail loss was physical efforts required to produce a vigorous zigzag motion during skin penetration; no other mechanism has been proposed. We examined the relationship between the host serum and cercarial tail loss. Cercariae of N. seoulense were collected from experimentally infected Segmentina hemisphaerula, and lots of 300 cercariae were cultured in medium 199 contained several types of sera. Cercarial tail degradation was induced in all media, but all the cercariae cultured except those cultured in media containing fetal bovine serum (FBS) died within 48 hr. After 72 hr cultivation in media containing FBS, cercarial tail degradation was induced in 67.0%; in continuous cultivation 13.3% of larvae survived for 7 days. Tail degradation did not occur in the absence of serum and when serum was heat inactivated at 56℃ for 30 min. The addition of 20 mM ethylenediaminetetraacetic acid (EDTA) blocked cercarial tail degradation completely. Moreover, the addition of 20 mM MgCl₂ restored tail degradation blocked by EDTA. These results suggest that the alternative complement pathway is related with the N. seoulense cercarial tail degradation induced by serum.

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Effects of anti-allergic drugs on intestinal mastocytosis and worm expulsion of rats infected with Neodiplostomum seoulense: Eun-Hee Shin, Tae-Heung Kim, Sung-Jong Hong, Jae-Hwan Park, Sang-Mee Guk, Jong-Yil Chai; Korean J Parasitol 2003;41(2):81-87.
Published online June 20, 2003; DOI: https://doi.org/10.3347/kjp.2003.41.2.81

Abstract
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The effects of anti-allergic drugs on intestinal mastocytosis and the expulsion of Neodiplostomum seoulense were observed in Sprague-Dawley rats, after oral infection with 500 metacercariae. The drugs used were hydroxyzine (a histamine receptor H₁ blocker), cimetidine (a H₂ blocker), cyclosporin-A (a helper T-cell suppressant), and prednisolone (a T- and B-cell suppressant). Infected, but untreated controls, and uninfected controls, were prepared. Worm recovery rate and intestinal mastocytosis were measured on weeks 1, 2, 3, 5, and 7 post-infection. Compared with the infected controls, worm expulsion was significantly (P < 0.05) delayed in hydroxyzine- and cimetidine-treated rats, despite mastocytosis being equally marked in the duodenum of all three groups. In the cyclosporin-A- and prednisolone-treated groups, mastocytosis was suppressed, but worm expulsion was only slightly delayed, without statistical significance. Our results suggest that binding of histamine to its receptors on intestinal smooth muscles is more important in terms of the expulsion of N. seoulense from rats than the levels of histamine alone, or mastocytosis.

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Asmaa M. I. Abuzeid, Mahmoud M. Hefni, Yue Huang, Long He, Tingting Zhuang, Guoqing Li
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Sang Hyub Lee, Bong-Kwang Jung, Jae-Hwan Park, Eun-Hee Shin, Jong-Yil Chai
The Korean Journal of Parasitology.2014; 52(3): 273. CrossRef
Mast cell histamine promotes the immunoregulatory activity of myeloid-derived suppressor cells
Rebecca K Martin, Sheinei J Saleem, Lauren Folgosa, Hannah B Zellner, Sheela R Damle, Giang-Kim T Nguyen, John J Ryan, Harry D Bear, Anne-Marie Irani, Daniel H Conrad
Journal of Leukocyte Biology.2014; 96(1): 151. CrossRef
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Genetic analyses of Acanthamoeba isolates from contact lens storage cases of students in Seoul, Korea: Hak-Sun Yu, Kyung-Hee Choi, Hyo-Kyung Kim, Hyun-Hee Kong, Dong-Il Chung; Korean J Parasitol 2001;39(2):161-170.
Published online June 30, 2001; DOI: https://doi.org/10.3347/kjp.2001.39.2.161

Abstract
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We conducted both the small subunit ribosomal DNA (SSU rDNA) polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and mitochondrial (mt) DNA RFLP analyses for a genetic characterization of Acanthamoeba isolates from contact lens storage cases of students in Seoul, Korea. Twenty-three strains of Acanthamoeba from the American Type Culture Collection and twelve clinical isolates from Korean patients were used as reference strains. Thirty-nine isolates from contact lens storage cases were classified into seven types (KA/LS1, KA/LS2, KA/LS4, KA/LS5, KA/LS7, KA/LS18, KA/LS31). Four types (KA/LS1, KA/LS2, KA/LS5, KA/LS18) including 33 isolates were regarded as A. castellanii complex by riboprints. KA/LS1 type was the most predominant (51.3%) in the present survey area, followed by KA/LS2 (20.9%), and KA/LS5 (7.7%) types. Amoebae of KA/LS1 type had the same mtDNA RFLP and riboprint patterns as KA/E2 and KA/E12 strains, clinical isolates from Korean keratitis patients. Amoebae of KA/LS2 type had the identical mtDNA RFLP patterns with A. castellanii Ma strain, a corneal isolate from an American patient as amoebae of KA/LS5 type, with KA/E3 and KA/E8 strains from other Korean keratitis patients. Amoebae of KA/LS18 type had identical patterns with JAC/E1, an ocular isolate from a Japanese patient. Three types, which remain unidentified at species level, were not corresponded with any clinical isolate in their mtDNA RFLP and riboprint patterns. Out of 39 isolates analyzed in this study, mtDNA RFLP and riboprint patterns of 33 isolates (84.6%) were identical to already known clinical isolates, and therefore, they may be regarded as potentially keratopathogenic. These results suggest that contact lens wearers in Seoul should pay more attention to hygienic maintenance of contact lens storage cases for the prevention of Acanthamoeba keratitis.

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Toxoplasma gondii antibody titers in sera of children admitted to the Seoul National University Children's Hospital: Jina Kook, Hong-Jin Lee, Beyong Il Kim, Chong-Ku Yun, Sang-Mee Guk, Min Seo, Yun-Kyu Park, Sung-Tae Hong, Jong-Yil Chai; Korean J Parasitol 1999;37(1):27-32.
Published online March 20, 1999; DOI: https://doi.org/10.3347/kjp.1999.37.1.27

Abstract
PDF

A total of 542 children under 10 years of age, admitted to the Seoul National University Children's Hospital, was examined for antibody titers of Toxoplasma gondii using indirect latex agglutination (ILA) test. Among them, 7.7% showed positive titers higher than 1:32, without significant difference between males (7.3%) and females (8.5%). The seropositive rate increased with age although the statistical significance was negligible (0.05<P<0.1). By residential areas, the prevalence appeared higher among children from southern provinces (Kyongsang-do and Cholla-do) than those from other areas, but the statistical significance was also very low (0.05<P<0.1). When the seropositive cases were analyzed by coincidental diseases, the prevalence was significantly higher in patients with congenital diseases than in patients with non-congenital diseases (P<0.05). The results showed that the seropositive rate of toxoplasmosis in children examined was not high compared with other endemic countries. Some correlations are suggested between toxoplasmosis and congenital anomalies in Korea.

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Brief Communication

Karyotype analysis of Neodiplostomum seoulense: Gab-Man Park, Soo-Ung Lee, Hyun-Young Park, Sun Huh; Korean J Parasitol 1998;36(4):277-279.
Published online December 20, 1998; DOI: https://doi.org/10.3347/kjp.1998.36.4.277

Abstract
PDF

A karyotype analysis of the chromosome of Neodiplostomum seoulense, one of causative agents of human intestinal trematodiasis, was done from the gonad tissue by the squashing method. The chromosome number was n = 10 and 2n = 20. Chromosome length was 1.30-4.0 ?m. Chromosome pairs in the complement consisted of two pairs of metacentric, five pairs of submetacentrics/subtelocentric and three pairs of telocentric chromosomes. These data were comparable with those of other intestinal trematodes.

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