Parasites, Hosts and Diseases

"Haplorchis pumilio"

Original Articles

Infection Status of Zoonotic Trematode Metacercariae in Fishes from Vientiane Municipality and Champasak Province in Lao PDR: Keeseon S. Eom, Han-Sol Park, Dongmin Lee, Woon-Mok Sohn, Tai-Soon Yong, Jong-Yil Chai, Duk-Young Min, Han-Jong Rim, Bounnaloth Insisiengmay, Bounlay Phommasack; Korean J Parasitol 2015;53(4):447-453.
Published online August 25, 2015; DOI: https://doi.org/10.3347/kjp.2015.53.4.447

Abstract
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The infection status of fishborne zoonotic trematode (FZT) metacercariae was investigated in fishes from 2 localities of Lao PDR. Total 157 freshwater fishes (17 species) were collected in local markets of Vientiane Municipality and Champasak Province in December 2010 and July 2011, and each fish was examined by the artificial digestion method. Total 6 species of FZT metacercariae, i.e., Opisthorchis viverrini, Haplorchis taichui, Haplorchis yokogawai, Haplorchis pumilio, Centrocestus formosanus, and Procerovum varium, were detected in fishes from Vientiane Municipality. The metacercariae of O. viverrini were detected in 50 (49.5%) out of 101 fishes (6 species), and their average number was 154 per fish infected. The remaining 5 species of heterophyid metacercariae were detected in 36.8%, 65.8%, 9.4%, 23.9%, and 5.1% fishes examined, and their average densities were 12, 1,038, 4, 15, and 13 per infected fish, respectively. In fishes from Champasak Province, 3 species of FZT metacercariae, i.e., O. viverrini, H. taichui, and H. yokogawai, were detected. Only 2 O. viverrini metacercariae were found in only 1 Barbonymus schwanefeldi. The metacercariae of H. taichui and H. yokogawai were detected in 60.0% and 50.0% of fishes examined, and their average densities were 47 and 28 per fish infected. By the present study, it has been confirmed that several species of FZT metacercariae are prevalent in fishes from Vientiane Municipality, with P. varium being a new member of FZT in Lao PDR. In comparison, FZT metacercariae are less prevalent in fishes from Champasak Province.

Citations

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Re‐evaluation of certain aspects of the EFSA Scientific Opinion of April 2010 on risk assessment of parasites in fishery products, based on new scientific data. Part 2
Ana Allende, Avelino Alvarez‐Ordóñez, Valeria Bortolaia, Sara Bover‐Cid, Alessandra De Cesare, Wietske Dohmen, Laurent Guillier, Lieve Herman, Liesbeth Jacxsens, Maarten Nauta, Lapo Mughini‐Gras, Jakob Ottoson, Luisa Peixe, Fernando Perez‐Rodriguez, Panag
EFSA Journal.2024;[Epub] CrossRef
Infection rate of Opisthorchis viverrini metacercariae in cyprinoid fish from the markets and its association to human opisthorchiasis in the local community in the Northeast Thailand
Lakhanawan Charoensuk, Alexis Ribas, Kacha Chedtabud, Suksanti Prakobwong
Acta Tropica.2022; 225: 106216. CrossRef
Similarities and differences among the Opisthorchiidae liver flukes: insights from Opisthorchis felineus
Maria Y. Pakharukova, Viatcheslav A. Mordvinov
Parasitology.2022; 149(10): 1306. CrossRef
Diagnosis of Centrocestus formosanus Infection in Zebrafish (Danio rerio) in Italy: A Window to a New Globalization-Derived Invasive Microorganism
Antonino Pace, Ludovico Dipineto, Serena Aceto, Maria Concetta Censullo, Maria Carmen Valoroso, Lorena Varriale, Laura Rinaldi, Lucia Francesca Menna, Alessandro Fioretti, Luca Borrelli
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Discovery of Carcinogenic Liver Fluke Metacercariae in Second Intermediate Hosts and Surveillance on Fish-Borne Trematode Metacercariae Infections in Mekong Region of Myanmar
Ei Ei Phyo Myint, Amornpun Sereemaspun, Joacim Rocklöv, Choosak Nithikathkul
International Journal of Environmental Research and Public Health.2020; 17(11): 4108. CrossRef
Larval Gnathostomes and Zoonotic Trematode Metacercariae in Fish from a Local Market in Yangon City, Myanmar
Jong-Yil Chai, Bong-Kwang Jung, Keon Hoon Lee, Jin-Youp Ryu, Hyeon-Seung Kim, Sung-Jong Hong, Thi Thi Htoon, Htay Htay Tin, Byoung-Kuk Na, Woon-Mok Sohn
The Korean Journal of Parasitology.2020; 58(6): 701. CrossRef
Infection status with zoonotic trematode metacercariae in fish from Lao PDR
Jong-Yil Chai, Soon-Hyung Lee, Han-Jong Rim, Woon-Mok Sohn, Bounlay Phommasack
Acta Tropica.2019; 199: 105100. CrossRef
Ultrasonographic investigation of cholangiocarcinoma in Lao PDR
Ju Yeong Kim, Tai-Soon Yong, Han-Jong Rim, Jong-Yil Chai, Duk-Young Min, Keeseon S. Eom, Woon-Mok Sohn, Jae Hoon Lim, Dongil Choi, Sithat Insisiengmay, Bounlay Phommasack, Bounnaloth Insisiengmay
Acta Tropica.2018; 182: 128. CrossRef
Opisthorchis viverrini infection in the snail and fish intermediate hosts in Central Vietnam
Ha Thanh Thi Dao, Veronique Dermauw, Sarah Gabriël, Apiporn Suwannatrai, Smarn Tesana, Giang Thanh Thi Nguyen, Pierre Dorny
Acta Tropica.2017; 170: 120. CrossRef
Metacercaria Infection Status of Fishborne Zoonotic Trematodes, Except for Clonorchis sinensis in Fish from the Heilongjiang Province, China
Jian-Hua Qiu, Ying Zhang, Xiao-Xuan Zhang, Yuan Gao, Qi Li, Qiao-Cheng Chang, Chun-Ren Wang
Foodborne Pathogens and Disease.2017; 14(8): 440. CrossRef
Fishborne zoonotic heterophyid infections: An update
Jong-Yil Chai, Bong-Kwang Jung
Food and Waterborne Parasitology.2017; 8-9: 33. CrossRef
Prevalence of Centrocestus formosanus Metacercariae in Ornamental Fish from Chiang Mai, Thailand, with Molecular Approach Using ITS2
Atcharaphan Wanlop, Chalobol Wongsawad, Pongphol Prattapong, Pheravut Wongsawad, Thapana Chontananarth, Jong-Yil Chai
The Korean Journal of Parasitology.2017; 55(4): 445. CrossRef
Zoonotic Trematode Metacercariae in Fish from Yangon, Myanmar and Their Adults Recovered from Experimental Animals
Jong-Yil Chai, Woon-Mok Sohn, Byoung-Kuk Na, Jong-Bok Park, Hoo-Gn Jeoung, Eui-Hyug Hoang, Thi Thi Htoon, Htay Htay Tin
The Korean Journal of Parasitology.2017; 55(6): 631. CrossRef

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Intestinal Helminths Recovered from Humans in Xieng Khouang Province, Lao PDR with a Particular Note on Haplorchis pumilio Infection: Jong-Yil Chai, Woon-Mok Sohn, Bong-Kwang Jung, Tai-Soon Yong, Keeseon S. Eom, Duk-Young Min, Bounnaloth Insisiengmay, Sithat Insisiengmay, Bounlay Phommasack, Han-Jong Rim; Korean J Parasitol 2015;53(4):439-445.
Published online August 25, 2015; DOI: https://doi.org/10.3347/kjp.2015.53.4.439

Abstract
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A survey of intestinal helminths was undertaken in riparian people in Xieng Khouang Province, Lao PDR. Fecal specimens were collected from 643 people (289 males and 354 females) residing in 4 districts (Nonghet, Kham, Phoukout, and Pek) and were examined by the Kato-Katz technique. The overall helminth egg positive rate was 41.2%, and hookworms revealed the highest prevalence (32.7%) followed by Trichuris trichiura (7.3%) and Ascaris lumbricoides (5.6%). The positive rate for small trematode eggs (STE), which may include Opisthorchis viverrini, heterophyids, and lecithodendriids, was 4.4%. For recovery of adult helminths, 12 STE or nematode/cestode egg-positive people were treated with 40 mg/kg praziquantel and 15 mg/kg pyrantel pamoate, and then purged. Mixed infections with 2 Haplorchis species (H. pumilio and H. taichui), Centrocestus formosanus, Opisthorchis viverrini, a species of cestode (Taenia saginata), and several species of nematodes including hookworms and Enterobius vermicularis were detected. The worm load for trematodes was the highest for H. pumilio with an average of 283.5 specimens per infected person followed by C. formosanus, H. taichui, and O. viverrini. The worm load for nematodes was the highest for hookworms (21.5/infected case) followed by E. vermicularis (3.2/infected case). The results revealed that the surveyed areas of Xieng Khouang Province, Lao PDR are endemic areas of various species of intestinal helminths. The STE found in the surveyed population were verified to be those of heterophyids, particularly H. pumilio.

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Foodborne intestinal flukes: A brief review of epidemiology and geographical distribution
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Echinostoma aegyptica (Trematoda: Echinostomatidae) Infection in Five Riparian People in Savannakhet Province, Lao PDR
Jong-Yil Chai, Bong-Kwang Jung, Taehee Chang, Hyejoo Shin, Woon-Mok Sohn, Keeseon S. Eom, Tai-Soon Yong, Duk-Young Min, Bounlay Phammasack, Bounnaloth Insisiengmay, Han-Jong Rim
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Haplorchis pumilio (Trematoda: Heterophyidae) as a new fish-borne zoonotic agent transmitted by Melanoides tuberculata (Mollusca: Thiaridae) in Brazil: A morphological and molecular study
André S. Lopes, Eduardo A. Pulido-Murillo, Alan L. Melo, Hudson A. Pinto
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Anh Kieu Thi Tran, Hoa Thuy Doan, Anh Ngoc Do, Van Thi Nguyen, Su Xuan Hoang, Huong Thu Thi Le, Hoa Thi Hoang, Nam Hoang Le, Quyen Bao Thi Le, Tran-Anh Le
BioMed Research International.2019; 2019: 1. CrossRef
Infection status with zoonotic trematode metacercariae in fish from Lao PDR
Jong-Yil Chai, Soon-Hyung Lee, Han-Jong Rim, Woon-Mok Sohn, Bounlay Phommasack
Acta Tropica.2019; 199: 105100. CrossRef
Echinochasmus caninus n. comb. (Trematoda: Echinostomatidae) Infection in Eleven Riparian People in Khammouane Province, Lao PDR
Jong-Yil Chai, Taehee Chang, Bong-Kwang Jung, Hyejoo Shin, Woon-Mok Sohn, Keeseon S. Eom, Tai-Soon Yong, Duk-Young Min, Bounlay Phammasack, Bounnaloth Insisiengmay, Han-Jong Rim
The Korean Journal of Parasitology.2019; 57(4): 451. CrossRef
Ultrasonographic investigation of cholangiocarcinoma in Lao PDR
Ju Yeong Kim, Tai-Soon Yong, Han-Jong Rim, Jong-Yil Chai, Duk-Young Min, Keeseon S. Eom, Woon-Mok Sohn, Jae Hoon Lim, Dongil Choi, Sithat Insisiengmay, Bounlay Phommasack, Bounnaloth Insisiengmay
Acta Tropica.2018; 182: 128. CrossRef
Echinostoma ilocanum Infection in Two Residents of Savannakhet Province, Lao PDR
Jong-Yil Chai, Woon-Mok Sohn, Jaeeun Cho, Keeseon S. Eom, Tai-Soon Yong, Duk-Young Min, Eui-Hyug Hoang, Bounlay Phommasack, Bounnaloth Insisiengmay, Han-Jong Rim
The Korean Journal of Parasitology.2018; 56(1): 75. CrossRef
Fishborne zoonotic heterophyid infections: An update
Jong-Yil Chai, Bong-Kwang Jung
Food and Waterborne Parasitology.2017; 8-9: 33. CrossRef

10,788 View
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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.

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Kulthida Kopolrat, Paiboon Sithithaworn, Smarn Tesana, Ross H. Andrews, Trevor N. Petney
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Infection Status of Zoonotic Trematode Metacercariae in Fishes from Vientiane Municipality and Champasak Province in Lao PDR
Keeseon S. Eom, Han-Sol Park, Dongmin Lee, Woon-Mok Sohn, Tai-Soon Yong, Jong-Yil Chai, Duk-Young Min, Han-Jong Rim, Bounnaloth Insisiengmay, Bounlay Phommasack
The Korean Journal of Parasitology.2015; 53(4): 447. CrossRef

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Hyperendemicity of Haplorchis taichui Infection among Riparian People in Saravane and Champasak Province, Lao PDR: Jong-Yil Chai, Tai-Soon Yong, Keeseon S. Eom, Duk-Young Min, Hyeong-Kyu Jeon, Tae-Yun Kim, Bong-Kwang Jung, Lay Sisabath, Bounnaloth Insisiengmay, Bounlay Phommasack, Han-Jong Rim; Korean J Parasitol 2013;51(3):305-311.
Published online June 30, 2013; DOI: https://doi.org/10.3347/kjp.2013.51.3.305

Abstract
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In this study, we found that Haplorchis taichui, a heterophyid intestinal fluke, is highly prevalent, with heavy worm loads, among riparian people in Saravane and Champasak province, Lao PDR. Fecal specimens were collected from 1,460 people (717 men and 743 women) in 12 riparian (Mekong river) districts and were examined by the Kato-Katz fecal smear technique. The overall helminth egg positive rate was 78.8% and 66.4% in Saravane and Champasak province, respectively. The positive rate for small trematode eggs (STE), which included H. taichui and other heterophyids, Opisthorchis viverrini, and lecithodendriids, was 69.9% and 46.3% in Saravane and Champasak province, respectively. To obtain adult flukes, 30 STE-positive people were treated with 40 mg/kg praziquantel and then purged. Whole diarrheic stools were collected 4-5 times for each person and searched for fluke specimens using a stereomicroscope. Mixed infections with various species of trematodes (H. taichui, Haplorchis pumilio, O. viverrini, Prosthodendrium molenkampi, Centrocestus formosanus, and Echinochasmus japonicus) and a species of cestode (Taenia saginata) were found. However, the worm load was exceptionally high for H. taichui compared with other trematode species, with an average of 21,565 and 12,079 specimens per infected person in Saravane and Champasak province, respectively, followed by H. pumilio (41.9 and 22.5, respectively) and O. viverrini (9.4 and 1.5, respectively). These results show that diverse species of intestinal and liver flukes are prevalent among riparian people in Saravane and Champasak province, Lao PDR, with H. taichui being the exceptionally dominant species.

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Foodborne Trematode Metacercariae in Fish from Northern Vietnam and Their Adults Recovered from Experimental Hamsters: Jong-Yil Chai, Nguyen Van De, Woon-Mok Sohn; Korean J Parasitol 2012;50(4):317-325.
Published online November 26, 2012; DOI: https://doi.org/10.3347/kjp.2012.50.4.317

Abstract
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The prevalence of foodborne trematode (FBT) metacercariae was investigated in fish from 2 localities of northern Vietnam in 2004-2005. Freshwater fish (9 species) were collected from local markets in Hanoi City (n=76) and Nam Dinh Province (n=79), and were examined for FBT metacercariae using the artificial digestion technique. Adult flukes were obtained from hamsters experimentally infected with the metacercariae at day 8 post-infection. Three (Haplorchis pumilio, Centrocestus formosanus, and Procerovum varium) and 6 (Haplorchis taichui, H. pumilio, C. formosanus, P. varium, Stellantchasmus falcatus, and Heterophyopsis continua) species of FBT metacercariae were detected in the 2 regions, respectively. Overall, among the positive fish species, H. pumilio metacercariae were detected in 104 (80.0%) of 130 fish examined (metacercarial density per infected fish; 64.2). C. formosanus metacercariae were found in 37 (40.2%) of 92 fish (metacercarial density; 14.7). P. varium metacercariae were detected in 19 (63.3%) of 30 fish (Anabas testudineus and Mugil cephalus) (metacercarial density; 247.7). S. falcatus metacercariae were found in all 10 M. cephalus examined (metacercarial density; 84.4). H. continua metacercariae (2 in number) were detected in 1 fish of Coilia lindmani. Morphologic characteristics of the FBT metacercariae and their experimentally obtained adults were described. The results have demonstrated that various FBT species are prevalent in northen parts of Vietnam.

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Fishborne Trematode Metacercariae in Freshwater Fish from Guangxi Zhuang Autonomous Region, China: Woon-Mok Sohn, Keeseon S. Eom, Duk-Young Min, Han-Jong Rim, Eui-Hyug Hoang, Yichao Yang, Xueming Li; Korean J Parasitol 2009;47(3):249-257.
Published online August 28, 2009; DOI: https://doi.org/10.3347/kjp.2009.47.3.249

Abstract
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A survey was performed to investigate the infection status of fishborne trematode (FBT) metacercariae in freshwater fish from Guangxi Zhuang Autonomous Region, China. A total of 307 freshwater fish of 31 species were collected from 5 administrative regions of Guangxi Zhuang Autonomous Region. They were examined by artificial digestion method from July 2003 to August 2004. No metacercariae were detected in fish from Fusui-xian. In fish from Mashan-xian and a market in Nanning, 3 species of metacercariae, Haplorchis taichui, Haplorchis pumilio, and Centrocestus formosanus, were mainly detected. Metacercariae (8 in number) of Clonorchis sinensis were found in 1 Chanodichthys dabryi purchased from a market in Nanning. In fish from Yangshuo, Metagonimus yokogawai metacercariae were detected from all 18 fish species examined. Total 13 C. sinensis metacercariae were found in 3 out of 10 Hemibarbus maculatus from Yangshuo. All 7 Zacco platypus from Yangshuo were infected with 8-112 Echinochasmus perfoliatus metacercariae. In fish from Binyang-xian, H. pumilo metacercariae were mainly detected in all 5 fish species examined, and only 1 metacercaria of C. sinensis was found in a Hemiculter leucisculus. From the above results, it was confirmed that some species of freshwater fish play a role of second intermediate hosts for FBT in Guangxi Zhuang Autonomous Region, China. In particular, 4 species of intestinal flukes, M. yokogawai, H. taichui, H. pumilio, and C. formosanus, were prevalent in fish hosts, whereas C. sinensis metacercariae were detected only in 3 fish species.

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