Parasites, Hosts and Diseases

"Cheong-Ha Yoon"

Original Articles

Prevalence of Intestinal Helminths among Inhabitants of Cambodia (2006-2011): Tai-Soon Yong, Jong-Yil Chai, Woon-Mok Sohn, Keeseon S. Eom, Hoo-Gn Jeoung, Eui-Hyug Hoang, Cheong-Ha Yoon, Bong-Kwang Jung, Soon-Hyung Lee, Muth Sinuon, Duong Socheat; Korean J Parasitol 2014;52(6):661-666.
Published online December 23, 2014; DOI: https://doi.org/10.3347/kjp.2014.52.6.661

Abstract
PDF

In order to investigate the status of intestinal helminthic infections in Cambodia, epidemiological surveys were carried out on a national scale, including 19 provinces. A total of 32,201 fecal samples were collected from schoolchildren and adults between 2006 and 2011 and examined once by the Kato-Katz thick smear technique. The overall egg positive rate of intestinal helminths was 26.2%. The prevalence of hookworms was the highest (9.6%), followed by that of Opisthorchis viverrini/minute intestinal flukes (Ov/MIF) (5.7%), Ascaris lumbricoides (4.6%), and Trichuris trichiura (4.1%). Other types of parasites detected were Enterobius vermicularis (1.1%), Taenia spp. (0.4%), and Hymenolepis spp. (0.2%). The northwestern regions such as the Siem Reap, Oddar Meanchey, and Banteay Meanchey Provinces showed higher prevalences (17.4-22.3%) of hookworms than the other localities. The southwestern areas, including Koh Kong and Preah Sihanouk Provinces showed higher prevalences of A. lumbricoides (17.5-19.2%) and T. trichiura (6.1-21.0%). Meanwhile, the central and southern areas, in particular, Takeo and Kampong Cham Provinces, showed high prevalences of Ov/MIF (23.8-24.0%). The results indicate that a considerably high prevalence of intestinal helminths has been revealed in Cambodia, and thus sustained national parasite control projects are necessary to reduce morbidity due to parasitic infections in Cambodia.

Citations

Citations to this article as recorded by

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Prevalence of Foodborne Trematodes in Small Indigenous Fish Species in Local Markets of Phnom Penh, Cambodia
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An Integrated Coproscopic and Molecular Method Provides Insights into the Epidemiology of Zoonotic Intestinal Helminths of Dogs across Cambodia
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Transboundary and Emerging Diseases.2023; 2023: 1. CrossRef
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PLOS Neglected Tropical Diseases.2023; 17(3): e0011073. CrossRef
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Scientific Reports.2023;[Epub] CrossRef
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Ting-Ting Zhao, Yi-Jing Feng, Pham Ngoc Doanh, Somphou Sayasone, Virak Khieu, Choosak Nithikathkul, Men-Bao Qian, Yuan-Tao Hao, Ying-Si Lai
eLife.2021;[Epub] CrossRef
Prevalence of meat-transmitted Taenia and Trichinella parasites in the Far East countries
Yi Liu, Zijian Dong, Jianda Pang, Mingyuan Liu, Xuemin Jin
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Prevalence and Intensity of Opisthorchis viverrini Metacercarial Infection in Fish from Phnom Penh, Takeo, and Kandal Provinces, Cambodia
Woon-Mok Sohn, Seung-Ho Choi, Bong-Kwang Jung, Sooji Hong, Seungwan Ryoo, Taehee Chang, Keon Hoon Lee, Byoung-Kuk Na, Sung-Jong Hong, Virak Khieu, Jong-Yil Chai
The Korean Journal of Parasitology.2021; 59(5): 531. CrossRef
Epidemiology of Taenia saginata taeniosis/cysticercosis: a systematic review of the distribution in East, Southeast and South Asia
Ramon M. Eichenberger, Lian F. Thomas, Sarah Gabriël, Branco Bobić, Brecht Devleesschauwer, Lucy J. Robertson, Anastasios Saratsis, Paul R. Torgerson, Uffe C. Braae, Veronique Dermauw, Pierre Dorny
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Morphological and Molecular Diagnosis of Necator americanus and Ancylostoma ceylanicum Recovered from Villagers in Northern Cambodia
Taehee Chang, Bong-Kwang Jung, Woon-Mok Sohn, Sooji Hong, Hyejoo Shin, Seungwan Ryoo, Jeonggyu Lee, Keon Hoon Lee, Virak Khieu, Rekol Huy, Jong-Yil Chai
The Korean Journal of Parasitology.2020; 58(6): 619. CrossRef
Low-Grade Endemicity of Opisthorchiasis, Yangon, Myanmar
Woon-Mok Sohn, Bong-Kwang Jung, Sung-Jong Hong, Keon-Hoon Lee, Jong-Bok Park, Hyun-Seung Kim, Seon Cho, Thi Thi Htoon, Htay Htay Tin, Jong-Yil Chai
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Thiamine dose response in human milk with supplementation among lactating women in Cambodia: study protocol for a double-blind, four-parallel arm randomised controlled trial
Kyly C Whitfield, Hou Kroeun, Tim Green, Frank T Wieringa, Mam Borath, Prak Sophonneary, Jeffrey R Measelle, Dare Baldwin, Lisa N Yelland, Shalem Leemaqz, Kathleen Chan, Jelisa Gallant
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Strongyloides stercoralis and hookworm co-infection: spatial distribution and determinants in Preah Vihear Province, Cambodia
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Human liver fluke Opisthorchis viverrini (Trematoda, Opisthorchiidae) in Central Myanmar: New records of adults and metacercariae identified by morphology and molecular analysis
Oranuch Sanpool, Win Pa Pa Aung, Rutchanee Rodpai, Wanchai Maleewong, Pewpan M. Intapan
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Zoonotic Trematode Metacercariae in Fish from Phnom Penh and Pursat, Cambodia: Jong-Yil Chai, Woon-Mok Sohn, Byoung-Kuk Na, Tai-Soon Yong, Keeseon S. Eom, Cheong-Ha Yoon, Eui-Hyug Hoang, Hoo-Gn Jeoung, Duong Socheat; Korean J Parasitol 2014;52(1):35-40.
Published online February 19, 2014; DOI: https://doi.org/10.3347/kjp.2014.52.1.35

Abstract
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A survey was performed to investigate the infection status of freshwater fish with zoonotic trematode metacercariae in Phnom Penh and Pursat Province, Cambodia. All collected fish with ice were transferred to our laboratory and examined using the artificial digestion method. In fish from Phnom Penh, 2 kinds of metacercariae (Opisthorchis viverrini and Haplorchis yokogawai) were detected. O. viverrini metacercariae were positive in 37 (50.0%) of 74 fish in 11 species (average no. metacercariae/fish, 18.6). H. yokogawai metacercariae were detected in 23 (57.5%) of 40 fish in 5 species (average no. metacercariae/fish, 21.0). In fish from Pursat Province, 5 kinds of metacercariae (O. viverrini, H. yokogawai, Haplorchis pumilio, Centrocestus formosanus, and Procerovum sp.) were detected; O. viverrini metacercariae (n=3) in 2 fish species (Henicorhynchus lineatus and Puntioplites falcifer), H. yokogawai metacercariae (n=51) in 1 species (P. falcifer), H. pumilio metacercariae (n=476) in 2 species (H. lineatus and Pristolepis fasciata), C. formosanus metacercariae (n=1) in 1 species (H. lineatus), and Procerovum sp. metacercariae (n=63) in 1 species (Anabas testudineus). From the above results, it has been confirmed that various freshwater fish play the role of a second intermediate host for zoonotic trematodes (O. viverrini, H. yokogawai, H. pumilio, C. formosanus, and Procerovum sp.) in Cambodia.

Citations

Citations to this article as recorded by

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Brief Communications

High Prevalence of Opisthorchis viverrini Infection in a Riparian Population in Takeo Province, Cambodia: Tai-Soon Yong, Eun-Hee Shin, Jong-Yil Chai, Woon-Mok Sohn, Keeseon S. Eom, Dong-Min Lee, Keunhee Park, Hoo-Gn Jeoung, Eui-Hyug Hoang, Yoon-Hee Lee, Hyun-Ju Woo, Ji-Hwa Lee, Sin-Il Kang, Jae-Ku Cha, Keon-Hoon Lee, Cheong-Ha Yoon, Muth Sinuon, Duong Socheat; Korean J Parasitol 2012;50(2):173-176.
Published online May 24, 2012; DOI: https://doi.org/10.3347/kjp.2012.50.2.173

Abstract
PDF

Opisthorchis viverrini infection was found to be highly prevalent in 3 riverside villages (Ang Svay Chek A, B, and C) of the Prey Kabas District, Takeo Province. This area is located in the southern part of Cambodia, where the recovery of adult O. viverrini worms was recently reported. From May 2006 until May 2010, fecal examinations were performed on a total of 1,799 villagers using the Kato-Katz thick smear technique. In the 3 villages, the overall positive rate for helminth eggs ranged from 51.7 to 59.0% (av. 57.4%), and the percentage positive for O. viverrini was 46.4-50.6% (47.5%). Other helminths detected included hookworms (13.2%), echinostomes (2.9%), Trichuris trichiura (1.3%), Ascaris lumbricoides (0.6%), and Taenia spp. (0.06%). The prevalence of O. viverrini eggs appeared to reflect a lower infection in younger individuals (<20 years) than in the adult population (>20 years). Men (50.4%) revealed a significantly higher (P=0.02) prevalence than women (44.3%). The Ang Svay Chek villages of the Prey Kabas District, Takeo Province, Cambodia have been confirmed to be a highly endemic area for human O. viverrini infection.

Citations

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Scientific Reports.2023;[Epub] CrossRef
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Patsy A. Zendejas-Heredia, Vito Colella, Lucas G. Huggins, Roland Schaper, Bettina Schunack, Rebecca J. Traub, Long-Xian Zhang
Transboundary and Emerging Diseases.2023; 2023: 1. CrossRef
Foodborne zoonotic parasites of the family Opisthorchiidae
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Detection of Gnathostoma spinigerum Third-Stage Larvae in Snakeheads Purchased from a Central Part of Myanmar: Bong-Kwang Jung, Jin-Ju Lee, Kyoung-Ho Pyo, Hyeong-Jin Kim, Hoo-Gn Jeong, Cheong-Ha Yoon, Soon-Hyung Lee, Eun-Hee Shin, Jong-Yil Chai; Korean J Parasitol 2008;46(4):285-288.
Published online December 20, 2008; DOI: https://doi.org/10.3347/kjp.2008.46.4.285

Abstract
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To examine the infection status of freshwater fish with Gnathostoma spp. larvae in Myanmar, we purchased 15 snakeheads, Channa striatus, from a local market in a suburban area of Naypyidaw, the new capital city. Two larval gnathostomes were collected using an artificial digestion technique, and observed by a light microscope and a scanning electron microscope. The size of an intact larva was 2.65 mm long and 0.32 mm wide. The characteristic morphology of the larvae included the presence of a long esophagus (0.80 mm long), 2 pairs of cervical sacs (0.43 mm long), and a characteristic head bulb with 4 rows of hooklets. The number of hooklets in the 1st, 2nd, 3rd, and 4th row was 45, 48, 50, and 52, respectively. Based on these morphological characters, the larvae were identified as the advanced 3rd-stage larvae of Gnathostoma spinigerum. This is the first report of detection of G. spinigerum 3rd-stage larvae in the central part of Myanmar. Our study suggests that intake of raw meat of snakehead fish in Myanmar may result in human gnathostomiasis.

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Original Article

A survey of Heterophyes nocens and Pygidiopsis summa metacercariae in mullets and gobies along the coastal areas of the Republic of Korea: Sang-Mee Guk, Eun-Hee Shin, Jae-Lip Kim, Woon-Mok Sohn, Kwang-Sun Hong, Cheong-Ha Yoon, Soon-Hyung Lee, Han-Jong Rim, Jong-Yil Chai; Korean J Parasitol 2007;45(3):205-211.
Published online September 20, 2007; DOI: https://doi.org/10.3347/kjp.2007.45.3.205

Abstract
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The infection status of mullets Mugil cephalus (n = 139) and gobies (n = 35) Acanthogobius flavimanus with metacercariae of Heterophyes nocens and Pygidiopsis summa was examined in 11 western, southern, and eastern coastal areas of the Republic of Korea, using a digestion technique. Heterophyid metacercariae were highly prevalent in mullets from western and southern coastal areas; Shinan-gun (100% for H. nocens and 100% for P. summa), Muan-gun (93% and 100%), Buan-gun (42% and 75%), Seocheon-gun (73% and 53%), Ganghwa-gun (47% and 100%), Sacheon-shi (47% and 77%), and Gangjin-gun (50% and 70%, respectively). Only 1 (10%) of 10 mullets from an eastern coastal area, i.e., Donghae-shi, was positive for P. summa metacercariae. Metacercarial densities were the highest in the trunk of mullets for H. nocens and the gill for P. summa. Gobies from Muan-gun were positive for H. nocens (40%) and P. summa metacercariae (40%), and gobies from Seocheon-gun revealed H. nocens metacercariae (20%). The metacercarial density was remarkably higher in mullets than in gobies. The results revealed that H. nocens and P. summa metacercariae are prevalent in mullets and gobies from coastal areas of the Republic of Korea, and the prevalence and intensity of infection vary according to geographical locality.

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