Parasites, Hosts and Diseases

"Hyo-Jin Kim"

Brief Communications

STAT6 Expression and IL-13 Production in Association with Goblet Cell Hyperplasia and Worm Expulsion of Gymnophalloides seoi from C57BL/6 Mice: Jin-Joo Lee, Donghee Kim, Kyoung-Ho Pyo, Min-Ki Kim, Hyo-Jin Kim, Jong-Yil Chai, Eun-Hee Shin; Korean J Parasitol 2013;51(5):589-594.
Published online October 31, 2013; DOI: https://doi.org/10.3347/kjp.2013.51.5.589

Abstract
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In intestinal helminth infections, Th2 immune respones are generally associated with mucin secretion for worm expulsion from the host intestine. In particular, IL-4 and IL-13 are the important cytokines related with intestinal mucus production via STAT6 signalling in nematode infections. However, this perspective has never been studied in Gymnophalloides seoi infection. The present study aimed to observe the STAT6 signalling and cytokine responses in C57BL/6 mice, a mouse strain resistant to infection with this trematode. The results showed that worm expulsion occurred actively during days 1-2 post-infection (PI), when goblet cells began to proliferate in the small intestine. The STAT6 gene expression in the mouse spleen became remarkable from day 2 PI. Moreover, G. seoi infection induced a significant increase of IL-13 from day 4 PI in the spleen of infected mice. Our results suggested that goblet cell hyperplasia and worm expulsion in G. seoi-infected mice should be induced by STAT6 signalling, in which IL-13 may be involved as a dominant triggering cytokine.

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Immune Regulation of Goblet Cell and Mucus Functions in Health and Disease
Jenny K. Gustafsson, Gunnar C. Hansson
Annual Review of Immunology .2025; 43(1): 169. CrossRef
The Interplay between Nutrition, Innate Immunity, and the Commensal Microbiota in Adaptive Intestinal Morphogenesis
Franziska Bayer, Olga Dremova, My Phung Khuu, Könül Mammadova, Giulia Pontarollo, Klytaimnistra Kiouptsi, Natalia Soshnikova, Helen Louise May-Simera, Kristina Endres, Christoph Reinhardt
Nutrients.2021; 13(7): 2198. CrossRef
Role of Goblet Cells in Intestinal Barrier and Mucosal Immunity
Songwei Yang, Min Yu
Journal of Inflammation Research.2021; Volume 14: 3171. CrossRef
The relationship between intestinal goblet cells and the immune response
Mingming Zhang, Chenchen Wu
Bioscience Reports.2020;[Epub] CrossRef
Developmental expression of STATs, nuclear factor-κB and inflammatory genes in the jejunum of piglets during weaning
Hongbo Yi, Denghu Jiang, Lin Zhang, Haitao Xiong, Feifei Han, Yizhen Wang
International Immunopharmacology.2016; 36: 199. CrossRef
Increased Intestinal Epithelial Cell Turnover and Intestinal Motility in Gymnophalloides seoi-Infected C57BL/6 Mice
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

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CD8⁺ T-cell Activation in Mice Injected with a Plasmid DNA Vaccine Encoding AMA-1 of the Reemerging Korean Plasmodium vivax: Hyo-Jin Kim, Bong-Kwang Jung, Jin-Joo Lee, Kyoung-Ho Pyo, Tae Yun Kim, Byung-il Choi, Tae Woo Kim, Hajime Hisaeda, Kunisuke Himeno, Eun-Hee Shin, Jong-Yil Chai; Korean J Parasitol 2011;49(1):85-90.
Published online March 18, 2011; DOI: https://doi.org/10.3347/kjp.2011.49.1.85

Abstract
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Relatively little has been studied on the AMA-1 vaccine against Plasmodium vivax and on the plasmid DNA vaccine encoding P. vivax AMA-1 (PvAMA-1). In the present study, a plasmid DNA vaccine encoding AMA-1 of the reemerging Korean P. vivax has been constructed and a preliminary study was done on its cellular immunogenicity to recipient BALB/c mice. The PvAMA-1 gene was cloned and expressed in the plasmid vector UBpcAMA-1, and a protein band of approximately 56.8 kDa was obtained from the transfected COS7 cells. BALB/c mice were immunized intramuscularly or using a gene gun 4 times with the vaccine, and the proportions of splenic T-cell subsets were examined by fluorocytometry at week 2 after the last injection. The spleen cells from intramuscularly injected mice revealed no significant changes in the proportions of CD8⁺ T-cells and CD4⁺ T-cells. However, in mice immunized using a gene gun, significantly higher (P<0.05) proportions of CD8⁺ cells were observed compared to UB vector-injected control mice. The results indicated that cellular immunogenicity of the plasmid DNA vaccine encoding AMA-1 of the reemerging Korean P. vivax was weak when it was injected intramuscularly; however, a promising effect was observed using the gene gun injection technique.

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Live Vaccination with Blood-Stage Plasmodium yoelii 17XNL Prevents the Development of Experimental Cerebral Malaria
Takashi Imai, Ha Ngo-Thanh, Kazutomo Suzue, Aoi Shimo, Akihiro Nakamura, Yutaka Horiuchi, Hajime Hisaeda, Takashi Murakami
Vaccines.2022; 10(5): 762. CrossRef
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Yan Liang, Lei Cui, Li Xiao, Xiao Liu, Yourong Yang, Yanbo Ling, Tong Wang, Lan Wang, Jie Wang, Xueqiong Wu
Frontiers in Immunology.2022;[Epub] CrossRef
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Leoneide Érica Maduro Bouillet, Mariana Oliveira Dias, Natália Alves Dorigo, Andrew Douglas Moura, Bruce Russell, Francois Nosten, Laurent Renia, Érika Martins Braga, Ricardo Tostes Gazzinelli, Maurício M. Rodrigues, Irene S. Soares, Oscar Bruna-Romero, J
Infection and Immunity.2011; 79(9): 3642. CrossRef

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Decrease of Metagonimus yokogawai Endemicity along the Tamjin River Basin: Jin-Ju Lee, Hyo-Jin Kim, Min-Jae Kim, Jo Woon Yi Lee, Bong-Kwang Jung, Ji-Youn Lee, Eun-Hee Shin, Jae-Lip Kim, Jong-Yil Chai; Korean J Parasitol 2008;46(4):289-291.
Published online December 20, 2008; DOI: https://doi.org/10.3347/kjp.2008.46.4.289

Abstract
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The Tamjin River which flows from Jangheung-gun via Gangjin-gun to the South Sea was reported to be a highly endemic area of Metagonimus yokogawai infection in 1977 and 1985. However, there were no recent studies demonstrating how much change occurred in the endemicity, in terms of prevalence and worm burden, of metagonimiasis in this river basin. Thus, a small-scale epidemiological survey was carried out on some residents along the Tamjin River basin in order to determine the current status of M. yokogawai infection. A total of 48 fecal samples were collected and examined by the Kato-Katz thick smear and formalin-ether sedimentation techniques. The egg positive rate of all helminths was 50.0%, and that of M. yokogawai was 37.5%, followed by C. sinensis 22.9% and G. seoi 4.2%. To obtain the adult flukes of M. yokogawai, 6 egg positive cases were treated with praziquantel 10 mg/kg in a single dose and purged with magnesium sulfate. A total of 5,225 adult flukes (average 871 specimens per person) of M. yokogawai were collected from their diarrheic stools. Compared with the data reported in 1977 and 1985, the individual worm burdens appeared to have decreased remarkably, although the prevalence did not decrease at all. It is suggested that the endemicity of M. yokogawai infection along the Tamjin River has been reduced. To confirm this suggestion, the status of infection in snail and fish intermediate hosts should be investigated.

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Infection characteristics of Metagonimus species (Digenea: Heterophyidae) metacercariae in fish from major rivers of Korea
Woon-Mok Sohn
Parasites, Hosts and Diseases.2024; 62(1): 1. CrossRef
Metagonimus suifunensis sp. n. (Trematoda: Heterophyidae) from the Russian Southern Far East: Morphology, life cycle, and molecular data
P.G. Shumenko, Y.V. Tatonova, V.V. Besprozvannykh
Parasitology International.2017; 66(1): 982. CrossRef
Prevalence ofClonorchis sinensisMetacercariae in Freshwater Fish from Three Latitudinal Regions of the Korean Peninsula
Shin-Hyeong Cho, Woon-Mok Sohn, Byoung-Kuk Na, Tong-Soo Kim, Yoon Kong, Keeseon Eom, Won-Seok Seok, Taejoon Lee
The Korean Journal of Parasitology.2011; 49(4): 385. CrossRef
Prevalence ofMetagonimusMetacercariae in Sweetfish,Plecoglossus altivelis, from Eastern and Southern Coastal Areas in Korea
Shin-Hyeong Cho, Tong-Soo Kim, Byoung-Kuk Na, Woon-Mok Sohn
The Korean Journal of Parasitology.2011; 49(2): 161. CrossRef
Fish-borne Parasitic Diseases
Jong-Yil Chai
Hanyang Medical Reviews.2010; 30(3): 223. CrossRef
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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Evaluation of the Korean Isolate-1 Tachyzoite Antigen for Serodiagnosis of Toxoplasmosis: Eun-Hee Shin, Dong-Hee Kim, Aifen Lin, Jo-Woon-Yi Lee, Hyo-Jin Kim, Myoung-Hee Ahn, Jong-Yil Chai; Korean J Parasitol 2008;46(1):45-48.
Published online March 20, 2008; DOI: https://doi.org/10.3347/kjp.2008.46.1.45

Abstract
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To evaluate the usefulness of the Korean Isolate-1 (KI-1) antigen for serodiagnosis of toxoplasmosis, antigen profiles of KI-1 tachyzoites were analyzed in comparison with RH tachyzoites by SDS-PAGE and immunoblotting. ELISA was performed on latex agglutination (LA)-positive and negative serum samples using KI-1 and RH antigens. Immunoblotting of the KI-1 antigen showed multiple antigen bands with molecular sizes of 22-105 kDa. Among them, 1 and 6 common bands were noted against a KI-1-infected and a RH-infected human serum, respectively, which represented differences in antigenic profiles between KI-1 and RH tachyzoites. However, all 9 LA-positive human sera were found positive by ELISA, and all 12 LA-negative sera were negative by ELISA; the correlation between the ELISA titers and LA titers was high (r = 0.749). Our results suggest that tachyzoites of KI-1 may be useful for serodiagnosis of human toxoplasmosis.

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Resistance toToxoplasma gondiiInfection in Mice Treated with Silk Protein by Enhanced Immune Responses
Joung-Ho Moon, Kyoung-Ho Pyo, Bong-Kwang Jung, Hyang Sook Chun, Jong-Yil Chai, Eun-Hee Shin
The Korean Journal of Parasitology.2011; 49(3): 303. CrossRef

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Case Report

A case of Diphyllobothrium latum infection with a brief review of diphyllobothriasis in the Republic of Korea: Eun Bin Lee, Jung Hoon Song, Nam Seon Park, Byung Kook Kang, Hyung Suk Lee, Yoon Ju Han, Hyo-Jin Kim, Eun-Hee Shin, Jong-Yil Chai; Korean J Parasitol 2007;45(3):219-223.
Published online September 20, 2007; DOI: https://doi.org/10.3347/kjp.2007.45.3.219

Abstract
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A case of Diphyllobothrium latum infection in a 49-year old man is described, and diphyllobothriasis latum in the Republic of Korea is briefly reviewed. An incomplete strobila of a tapeworm, 95 cm in length, without scolex and neck, was spontaneously discharged in the feces of a patient. On the basis of morphologic characteristics of the worm and eggs, the worm was identified as D. latum. The patient was successfully treated with a single dose (15 mg/kg) of praziquantel. The most probable source of infection was salmon flesh according to the past history of the patient. The first case of D. latum infection was documented in 1971, and this is the 43rd recorded case in the Republic of Korea. The 43 cases were briefly reviewed. The patients' main complaints were gastrointestinal troubles, such as mild abdominal pain, indigestion, and diarrhea, and discharge of tapeworm segments in the feces. The suspected infection sources included raw or improperly cooked flesh of fresh or brackish water fish, including the perch, mullet, salmon, and trout.

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The Korean Journal of Parasitology.2014; 52(6): 673. CrossRef
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Sang Hyun Park, Keeseon S. Eom, Min Sun Park, Oh Kyoung Kwon, Hyo Sun Kim, Jai Hoon Yoon
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Clinical Update on Parasitic Diseases
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Korean Journal of Medicine.2013; 85(5): 469. CrossRef
Molecular identification of Diphyllobothrium latum and a brief review of diphyllobothriosis in China
Ai-Jiang Guo, Kan Liu, Wei Gong, Xue-Nong Luo, Hong-Bin Yan, Song-Buo Zhao, Song-Nian Hu, Wan-Zhong Jia
Acta Parasitologica.2012;[Epub] CrossRef
Four Human Cases of Diphyllobothrium latum Infection
Hee-Jung Choi, Junghye Lee, Hyun-Jong Yang
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Diphyllobothriasis in a nine-year-old child in India: a case report
KV Ramana, Sanjeev Rao, Moses Vinaykumar, M Krishnappa, Rajeshwar Reddy, Mohammed Sarfaraz, Vamshikrishna Kondle, MS Ratnamani, Ratna Rao
Journal of Medical Case Reports.2011;[Epub] CrossRef
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Jong-Yil Chai
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Myoung-Hee Ahn
Hanyang Medical Reviews.2010; 30(3): 149. CrossRef
Morphologic and Genetic Identification of Diphyllobothrium nihonkaiense in Korea
Hyeong-Kyu Jeon, Kyu-Heon Kim, Sun Huh, Jong-Yil Chai, Duk-Young Min, Han-Jong Rim, Keeseon S. Eom
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M Detrait, L Poirier, D-C Roy, T Kiss, L Busque, S Cohen, S Lachance, G Sauvageau, J Roy
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Tomáš Scholz, Hector H. Garcia, Roman Kuchta, Barbara Wicht
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Trends in Parasitology.2008; 24(3): 143. CrossRef

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Brief Communications

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
Journal of Helminthology.2023;[Epub] CrossRef
Intestinal Helminthic Infections in Striped Field Mice,Apodemus agrarius, from Two Southern Regions of Korea
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
The Korean Journal of Parasitology.2009; 47(3): 311. CrossRef
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Jong-Yil Chai, Eun-Hee Shin, Soon-Hyung Lee, Han-Jong Rim
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Eun-Hee Shin, Jae-Lip Kim, Jong-Yil Chai
Journal of Parasitology.2008; 94(6): 1379. CrossRef
Ecological surveillance of small mammals at Firing Points 10 and 60, Gyeonggi Province, Republic of Korea, 2001–2005
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Plagiorchis muris infection in Apodemus agrarius from northern Gyeonggi-do (Province) near the demilitarized zone: 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):153-156.
Published online June 20, 2007; DOI: https://doi.org/10.3347/kjp.2007.45.2.153

Abstract
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The small intestines of 6 species of rodents and 1 species of insectivore were examined seasonally for Plagiorchis muris infection in 3 different localities in northern Gyeonggi-do (Province), near the demilitarized zone (DMZ). A total of 1,496 animals, including 1,366 Apodemus agrarius, 54 Crocidura lasiura (insectivore), 32 Mus musculus, 28 Micronytus fortis, 9 Eothenomys regulus, 6 Micronys minutus, and 3 Cricetulus triton, were live-trapped at Yeoncheon-gun (n = 351), Paju-shi (804) and Pocheon-gun (343) at 3-mo intervals from December 2004 to September 2005. A total of 1,647 P. muris were collected from 72 (5.3%) A. agrarius. The infection rate was the highest in Pocheon-gun (8.2%), followed by Yeoncheon-gun (5.0%) and Paju-shi (4.2%). A higher infection rate was observed in A. agrarius captured during September (19.4%) than those captured during December (3.0%), June (2.6%), or April (0%). However, the worm burden was the highest in June (av. 32.1/animal), followed by September (24.7), December (4.0), and April (0). None of the other animal species were found infected with P. muris. The results reveal that A. agrarius is a natural definitive host for P. muris, and infection rates and worm burdens vary seasonally and geographically.

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Infections of Intestinal Helminth at Two Species of Field Mice, Apodemus agrarius and A. Peninsulae, in Gangwondo and Chungcheongnam-do, Korea
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The Korean Journal of Parasitology.2018; 56(3): 301. CrossRef
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K. Boyce, G. Hide, P.S. Craig, C. Reynolds, M. Hussain, A.J. Bodell, H. Bradshaw, A. Pickles, M.T. Rogan
Journal of Helminthology.2014; 88(3): 310. CrossRef
Intestinal Helminthic Infections in Striped Field Mice,Apodemus agrarius, from Two Southern Regions of Korea
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
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Young-Il Lee, Hee-Jang Pyeon, Min Seo
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Ecological Indicators.2011;[Epub] CrossRef
Fish-borne Parasitic Diseases
Jong-Yil Chai
Hanyang Medical Reviews.2010; 30(3): 223. CrossRef
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
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
The Korean Journal of Parasitology.2009; 47(3): 311. CrossRef

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Original Article

A new endemic focus of Gymnophalloides seoi infection on Aphae Island, Shinan-gun, Jeollanam-do: Jae-Hwan Park, Sang-Mee Guk, Eun-Hee Shin, Hyo-Jin Kim, Jae-Lip Kim, Min Seo, Yun-Kyu Park, Jong-Yil Chai; Korean J Parasitol 2007;45(1):39-44.
Published online March 20, 2007; DOI: https://doi.org/10.3347/kjp.2007.45.1.39

Abstract
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A new endemic focus of Gymnophalloides seoi infection has been discovered on Aphae Island (Shinan-gun, Jeollanam-do), Republic of Korea. This area, which is referred to as Bokyong-ri, is a small seashore village located in the northern portion of the island. Fecal samples were collected from a total of 57 residents and examined by the Kato-Katz and formalin-ether sedimentation techniques. Helminth eggs were detected in 37 samples (64.9%); 33 samples were positive for G. seoi eggs (57.9%), 4 for Pygidiopsis summa (7.0%), 13 for other heterophyids (22.8%), 1 for Clonorchis sinensis (1.7%), and 1 for Trichuris trichiura (1.7%). Women (70.4%) revealed higher rates of G. seoi infection than did men (46.7%), and individuals older than 50 years of age also evidenced higher rates of G. seoi infection than in other age groups (P< 0.05). In worm collection from 13 G. seoi egg positive cases, G. seoi (total 86,558 specimens), Heterophyes nocens (278), Stictodora sp. (10), Heterophyopsis continua (3), P. summa (3), and unidentified flukes (42) were collected. Oysters, the source of G. seoi infection, were collected from an area proximal to the village and 50 were examined for metacercariae; 47 (94%) were found infected and the observed metacercarial density was 9.5 ± 8.9 per oyster. The results of this study indicate that Bokyong-ri is a new endemic area of G. seoi infection, with high rates of infection in humans and oysters.

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Brief Communication

A survey of cryptosporidiosis among 2,541 residents of 25 coastal islands in Jeollanam-do (Province), Republic of Korea: Jae-Hwan Park, Hyo-Jin Kim, Sang-Mee Guk, Eun-Hee Shin, Jae-Lip Kim, Han-Jong Rim, Soon-Hyung Lee, Jong-Yil Chai; Korean J Parasitol 2006;44(4):367-372.
Published online December 20, 2006; DOI: https://doi.org/10.3347/kjp.2006.44.4.367

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In order to determine the distribution and prevalence of human cryptosporidiosis on western and southern coastal islands of Jeollanam-do (Province), fecal samples were collected from 2,541 people residing on 25 islands, 13 in the western coasts and 12 in the southern coasts, during July and August 2000. Fecal smears were prepared following formalin-ether sedimentation of the samples and stained by a modified acid-fast procedure. The presence of Cryptosporidium oocysts was determined by light microscopy. Cryptosporidium oocysts were detected in 38 specimens (1.5%). The oocyst positive rate varied (0-6.0%) according to island; the highest was detected on Oenarodo (6.0%), followed by Naenarodo (5.6%) and Nakwoldo (5.4%). The majority (35 persons, 94.6%) of Cryptosporidium-infected individuals were older than 50 years of age. Men (22/1,159; 1.9%) were infected at a higher rate than women (16/1,382; 1.2%). The results of the present survey indicate that human Cryptosporidium infections (due to Cryptosporidium hominis and/or C. parvum) are maintained at a relatively low prevalence on coastal islands of Jeollanam-do, Republic of Korea.

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