Adult notocotylid flukes (Digenea: Notocotylidae) were recovered from the ceca of Pitalah ducks (Anas sp.) in Aceh Province, Indonesia. These flukes were morphologically characterized by a median ventral ridge with 2 lateral rows of ventral papillae and the absence of both a ventral sucker and pharynx, consistent with the characteristics of the genus Catatropis. They exhibited a genital pore located just posterior to the oral sucker, 10–11 pairs of ventral papillae, a deep and multi-lobed ovary and testes, a metraterm equal in length to the cirrus sac, and ceca bearing numerous diverticula; accordingly, they were identified as Catatropis indicus Srivastava, 1935. Adult specimens measured 3.01–3.77 mm (average 3.47 mm) in length and 0.98–1.21 mm (average 1.11 mm) in width (n=8). Uterine eggs measured 0.016–0.023 mm (average 0.019 mm) in length and 0.008–0.014 mm (average 0.012 mm) in width (n=20), each bearing 2 long polar filaments. These specimens resembled Catatropis vietnamensis Izrailskaia et al., 2019, and Catatropis pakistanensis Schuster and Wibbelt, 2012, sharing features such as a genital pore immediately posterior to the oral sucker and other morphological traits. However, they differed from C. vietnamensis by having a larger body, ceca with numerous diverticula, and a broader anterior distribution of vitelline follicles. They also differed from C. pakistanensis in possessing a longer esophagus and ceca with multiple diverticula. In 28S rDNA sequence analysis, our specimens showed 99.1% identity with both C. indicus and C. vietnamensis. In contrast, internal transcribed spacer 2 (ITS2) sequence comparisons revealed only 96.0%–96.1% identity with C. vietnamensis (no GenBank data available for C. indicus), suggesting that our specimens are phylogenetically distant from C. vietnamensis. This represents the first report of C. indicus from ducks in Indonesia. A brief review of Catatropis species is provided.
Stray cats serve as reservoir hosts for various zoonotic parasites, posing a significant risk of transmission to humans. This study aimed to assess the prevalence of parasitic infections in stray cats from Gimpo-si, Gyeonggi-do, Korea. A total of 101 fecal and 237 blood (serum) samples were collected from 237 stray cats captured through the trapneuter-return program in 2021. The samples were analyzed using microscopy, nested-PCR, and ELISA to detect parasitic infections. Fecal examination revealed that Toxocara cati eggs were present in 26.7% (27/101) of samples, while eggs of Spirometra sp. (2%), Clonorchis sinensis (1%), and Trichuris sp. (1%) were also detected. PCR analysis identified Toxoplasma gondii DNA in 17 (16.8%) fecal samples, while genetic markers of Cryptosporidium felis and Enterocytozoon bieneusi were each detected in 4 (4%) samples. Positive rates of IgM and IgG were 21.9% (52/237) and 21.1% (50/237) in serological tests for T. gondii-specific antibodies. This study confirms the widespread presence of zoonotic parasites in stray cats from Gimpo-si, highlighting the potential public health risks associated with these infections. Continuous surveillance and control measures are essential from a One Health perspective to reduce the risk of zoonotic transmission.
Citations
Citations to this article as recorded by
Molecular detection of Toxoplasma gondii in wild oysters and seawater on the southeast coast of South Korea Hyejoo Shin, Sooji Hong, Seungwan Ryoo, Jong-Yil Chai, Bong-Kwang Jung Food Microbiology.2026; 134: 104925. CrossRef
Standard- and large-sized eggs of Trichuris trichiura were found in the feces of schoolchildren in Yangon, Myanmar during epidemiological surveys and mass deworming with albendazole in 2017-2019. The standard-sized eggs were identified as those of T. trichiura, but it was necessary to exclude the possibility of the large-sized eggs belonging to Trichuris vulpis, a dog whipworm. We conducted morphological and molecular studies to determine the species of the 2 types of Trichuris eggs. Individual eggs of both sizes were isolated from Kato-Katz fecal smears (n=20) and mechanically destroyed using a 23G injection needle. Nuclear DNA was extracted, and the 18S rRNA region was sequenced in 15 standard-sized eggs and 15 large-sized eggs. The average size of standard-sized eggs (T. trichiura) was 55.2×26.1 μm (range: 51.7-57.6×21.3-28.0 μm; n=97), whereas the size of large-sized eggs was 69.3×32.0 μm (range: 65.1-76.4×30.1-34.5 μm; n=20), slightly smaller than the known size of T. vulpis. Regarding standard-sized eggs, the 18S rRNA nucleotide sequences exhibited 100% homology with T. trichiura deposited in GenBank and 88.6-90.5% homology with T. vulpis. Regarding large-sized eggs, the nucleotide sequences showed 99.8-100% homology with T. trichiura in GenBank and 89.6-90.7% homology with T. vulpis. Both standard- and large-sized eggs of Trichuris spp. found in Myanmar schoolchildren during 2017-2019 were morphologically and molecularly confirmed to belong to T. trichiura. The conversion of eggs from smaller to large sizes might be due to anthelmintic treatments with albendazole.
Citations
Citations to this article as recorded by
Paleoparasitology research on ancient helminth eggs and larvae in the Republic of Korea Jong-Yil Chai, Min Seo, Dong Hoon Shin Parasites, Hosts and Diseases.2023; 61(4): 345. CrossRef
Head louse infestation is a significant public health problem across the world, particularly among preschool and primary schoolchildren. This study investigated the trends of head louse infestation in the Republic of Korea over a 9-year period (2011-2019), targeting primary schoolchildren in 3 areas of Seoul, 4 other large cities, and 9 provinces. A survey was administered annually by the health staff of each regional office (n= 16) of the Korea Association of Health Promotion (KAHP). The branch offices of KAHP examined a total of 51,508 primary schoolchildren, comprising 26,532 boys and 24,976 girls. Over the 9-year survey, a total of 1,107 (2.1%) schoolchildren tested positive for adults and/or nits of Pediculus humanus capitis. The prevalence was 2.8% (133/4,727) in 2011-2012 and gradually decreased to 0.8% (49/6,461) in 2019 (P< 0.05). Head lice were found more frequently in girls (3.0%; 746/24,976) than in boys (1.4%; 361/26,532) (P< 0.05). In terms of geographic localities, the highest infestation rate, 4.7% (average prevalence over 9 years), was observed in southern Seoul (Gangnam branch of KAHP), whereas the lowest infestation rate, 0.7%, was seen in Gyeongsang (north and south provinces) and western Seoul. Although the prevalence decreased significantly during the 9-year period, head louse infestation remains a health and hygiene issue among primary schoolchildren in the Republic of Korea. Regular surveys along with health education are needed to further improve children’s hair hygiene.
Citations
Citations to this article as recorded by
Prevalence and Risk Factors of Head Lice Among Schoolchildren in Kirkuk Fatema W. Abdul Aziz Academia Open.2025;[Epub] CrossRef
A case of co-infection with head lice and varicella in a child: considerations for rational management O.V. Shvaratska, V.V. Mavrutenkov, T.V. Svyatenko, O.M. Yakunina CHILD`S HEALTH.2024; 19(1): 30. CrossRef
Prevalence and associated factors of head lice infestation among primary school children in low- and middle-income countries: systematic review and meta-analysis Amare Mebrat Delie, Mihret Melese, Liknaw Workie Limenh, Dereje Esubalew, Nigus Kassie Worku, Eneyew Talie Fenta, Mickiale Hailu, Alemwork Abie, Molla Getie Mehari, Tenagnework Eseyneh Dagnaw BMC Public Health.2024;[Epub] CrossRef
Epidemiology of pediculosis in the school-going children of district Hyderabad, Sindh, Pakistan Saima Naz, Maria Rebecca, Ahmad Kamran Khan, Irfan Ahmed International Journal of Tropical Insect Science.2023; 43(5): 1811. CrossRef
Head lice infestation and the role of some cognitive‐behavioral factors in its spread and prevention among adolescent girls: A cross‐sectional study in Northwest Iran Towhid Babazadeh, Khalil Maleki Chollou, Sanaz Abedi‐Nerbin, Salar Abedi‐Nerbin, Farzaneh Shahnavaz‐Yoshanluie, Soheila Ranjbaran Health Science Reports.2023;[Epub] CrossRef
A 12-year nationwide survey (2008-2019) was performed to investigate the prevalence of Enterobius vermicularis infection among preschool children in Seoul, 4 large cites (Busan, Incheon, Daegu, and Ulsan), and 9 provinces (grouped into 5 localities) in the Republic of Korea (=Korea). The survey was carried out once a year by 16 regional offices of the Korea Association of Health Promotion. The cello-tape perianal swab method (1 smear per child) was applied to detect eggs of E. vermicularis and other helminths. According to the results, the egg positive rate of E. vermicularis infection in 2008-2009 was 1.8-2.0%, but it decreased gradually to 0.6% in 2019 (P<0.05). The prevalence was significantly higher in boys (0.7-5.0%, mean 1.8%) than in girls (0.5-2.8%, mean 1.3%) (P<0.05). The 2 most southern localities, Jejudo (Province) and Jeolla-do (inclusive of Jeollabuk-do and Jeollanam-do) and a mid-western province, Gyeonggi-do, revealed higher prevalences, whereas Seoul and Gangwon-do showed lower prevalences. The results indicate that a low-grade prevalence of E. vermicularis infection (less than 4%) has been maintained for the recent 12 years among preschool children in Korea. Continuous monitoring of enterobiasis in the child age group is necessary in Korea.
Citations
Citations to this article as recorded by
Parasitoses intestinales infantiles P. Bourée EMC - Traité de médecine AKOS.2025; 28(3): 1. CrossRef
Enterobius vermicularis infection and its risk factors among rural schoolchildren in Zhejiang Province: a cross-sectional study Jialie Jin, Wei Ruan, Wenjie Xu, Xuan Zhang, Kegen Yu, Hualiang Chen, Jiaqi Zhang, Jimin Sun, Jianmin Jiang, Xiaoxiao Wang Parasitology Research.2025;[Epub] CrossRef
Impacts of environmental pollutants and environmentally transmitted parasites on male fertility and sperm quality Hend Abd El-Halim Mansour, Al- Shaimaa Mohsen Sadek Discover Applied Sciences.2025;[Epub] CrossRef
Pinworm (Enterobius Vermicularis) Infestation: An Updated Review Alexander K.C. Leung, Joseph M. Lam, Benjamin Barankin, Alex H.C. Wong, Kin F. Leong, Kam L. Hon Current Pediatric Reviews.2025; 21(4): 333. CrossRef
Parasitosis intestinales en niños P. Bourée EMC - Tratado de Medicina.2025; 29(4): 1. CrossRef
Parassitosi intestinali infantili P. Bourée EMC - AKOS - Trattato di Medicina.2025; 27(4): 1. CrossRef
2023년 국내 장내기생충 감염 조사 명노 이, 정원 주, 선옥 백, 영주 이, 은솔 이, 희일 이 Public Health Weekly Report.2024; 17(28): 1227. CrossRef
Association Between Anthropometric and Hematological Parameters and the Diagnosis of Intestinal Parasitosis in Low-Income Children Bruno Freire, Alessandra Marques Sohn, Ricardo Rojas-Humpire, Salomon Huancahuire-Vega Children.2024; 11(12): 1416. CrossRef
Positive rates for Enterobius vermicularis eggs among preschool children in Yeosu-si, Jeollanam-do, Korea (2017-2021) Myoung-Ro Lee, Hee-Eun Shin, Seon-Ok Back, Young-Ju Lee, Jung-Won Ju, Chun Soon Park, Hee-Il Lee Parasites, Hosts and Diseases.2023; 61(1): 84. CrossRef
Acanthoparyphium shinanense n. sp. (Digenea: Echinostomatidae) is described from chicks experimentally infected with the metacercariae encysted in 2 brackish water clam species, Ruditapes philippinarum and Coecella chinensis, in the Republic of Korea. The metacercariae were round to oval, armed with 23 collar spines, and 0.216 (0.203-0.226) mm in diameter. From 5 chicks experimentally infected each with 200 metacercariae, 34 juvenile (5-day-old worms) and 104 adult flukes (7-day-old worms) were harvested from their small intestines, with the average worm recovery rate of 13.8%. The adult flukes were 3.18 (2.89-3.55) mm long and 0.68 (0.61-0.85) mm wide, with an elongated, posteriorly tapering body, and a prominent head collar armed with 23 collar spines arranged in a single uninterrupted row. The posterior testis of A. shinanense was longitudinally elongated, which is similar to Acanthoparyphium spinulosum Johnston, 1917 but unique from the other closely related species, including Acanthoparyphium tyosenense Yamaguti, 1939, Acanthoparyphium kurogamo Yamaguti, 1939, and Acanthoparyphium marilae Yamaguti, 1934. The eggs of A. shinanense were larger than those of A. spinulosum, and the anterior extent of 2 lateral groups of vitellaria was slightly more limited in A. shinanense than in A. spinulosum. Molecular analysis of nuclear and mitochondrial genes revealed low homology with A. spinulosum from USA (96.1% in 5.8S rRNA) and Ukraine (97.9% in 28S rRNA), Acanthoparyphium n. sp. from USA (98.0% in 28S rRNA), and Acanthoparyphium sp. from Australia, Kuwait, and New Zealand. Biological characteristics, including its first intermediate host and natural definitive hosts, as well as its zoonotic capability, should be elucidated.
Citations
Citations to this article as recorded by
Supplemental Description of Caballerotrema annulatum (Diesing, 1850) Ostrowski de Núñez and Sattmann, 2002 (Digenea: Caballerotrematidae) from a New Host (Electrophorus Cf. Varii) and Locality (Amazon River, Colombia) with Phylogenetic Analysis and Emende Kamila Cajiao-Mora, John H. Brule, Haley R. Dutton, Stephen A. Bullard Journal of Parasitology.2024;[Epub] CrossRef
Human infection with Taenia asiatica or a hybrid between Taenia saginata and T. asiatica has not been reported in Cambodia. We detected for the first time a hybrid form between T. saginata and T. asiatica in Preah Vihear Province, Cambodia. An adult tapeworm specimen, i.e., 75 cm long strobila without scolex, was expelled from a 27-year-old man after praziquantel medication and purging. It was morphologically indistinguishable between T. saginata and T. asiatica. Several proglottids were molecularly analyzed to confirm the tapeworm species. The mitochondrial gene encoding cytochrome c oxidase subunit 1 (cox1) and nuclear genes encoding elongation factor-1α (ef1) and ezrin-radixin-moesin (ERM)-like protein (elp) were sequenced, and a single-allele analysis was performed to confirm the haploid genotype. The results revealed that our sample showed a discrepancy between the mitochondrial and 2 nuclear genes. It possessed homozygous sequences typical of T. saginata at cox1 and ef1 loci. However, it was heterozygous at the elp locus, with 1 allele in T. asiatica (elpA) and 1 in T. saginata (elpC), which indicates that it is a hybrid between T. saginata and T. asiatica. The present results confirmed the presence of a hybrid between T. saginata and T. asiatica in Cambodia and strongly suggest the existence of also ‘pure’ T. asiatica in Cambodia.
Citations
Citations to this article as recorded by
Molecular Identification and Appraisal of the Genetic Variation of Taenia saginata in Central Regions of Vietnam Giang Tran Thi, Ilenia Azzena, Fabio Scarpa, Piero Cossu, Cong Danh Le, Phuong Anh Ton Nu, Thi Minh Chau Ngo, Daria Sanna, Marco Casu Life.2022; 12(1): 70. CrossRef
Case Report: Molecular Diagnosis Revealing an Intestinal Infection of a Hybridized Tapeworm (Taenia saginata and Taenia asiatica) to Human in Yunnan, China Kan-Kan Chu, Ye Qiu, Ce-Heng Liao, Zhi You, Zuo-Shun He, Wen Fang, Hong-Ying Li, Peter Daszak, Jun-Jie Hu, Yun-Zhi Zhang, Xing-Yi Ge Frontiers in Gastroenterology.2022;[Epub] CrossRef
Life cycle stages, including daughter sporocysts, cercariae, and metacercariae, of Parvatrema duboisi (Dollfus, 1923) Bartoli, 1974 (Digenea: Gymnophallidae) have been found in the Manila clam Ruditapes philippinarum from Aphaedo (Island), Shinan-gun, Jeollanam-do, Korea. The daughter sporocysts were elongated sac-like and 307-570 (av. 395) μm long and 101-213 (av. 157) μm wide. Most of the daughter sporocysts contained 15-20 furcocercous cercariae each. The cercariae measured 112-146 (av. 134) μm in total length and 35-46 (av. 40) μm in width, with 69-92 (av. 85) μm long body and 39-54 (av. 49) μm long tail. The metacercariae were 210-250 (av. 231) μm in length and 170-195 (av. 185) μm in width, and characterized by having a large oral sucker, genital pore some distance anterior to the ventral sucker, no ventral pit, and 1 compact or slightly lobed vitellarium, strongly suggesting P. duboisi. The metacercariae were experimentally infected to ICR mice, and adults were recovered at day 7 post-infection. The adult flukes were morphologically similar to the metacercariae except in the presence of up to 20 eggs in the uterus. The daughter sporocysts and metacercariae were molecularly (ITS1-5.8S rDNA-ITS2) analyzed to confirm the species, and the results showed 99.8-99.9% identity with P. duboisi reported from Kyushu, Japan and Gochang, Korea. These results confirmed the presence of various life cycle stages of P. duboisi in the Manila clam, R. philippinarum, playing the role of the first as well as the second intermediate host, on Aphae-do (Island), Shinan-gun, Korea.
Citations
Citations to this article as recorded by
Spatial patterns of trematode-induced pits on bivalve skeletons: Challenges and prospects for research on parasite-host dynamics Alexis Rojas, John Warren Huntley, Monica Caffara, Daniele Scarponi The Holocene.2025; 35(12): 1259. CrossRef
Pearl formation associated with gymnophallid metacercariae in Mytilus galloprovincialis from the Northwestern Adriatic coast: Preliminary observations Erica Marchiori, Francesco Quaglio, Giovanni Franzo, Ginevra Brocca, Sonja Aleksi, Pietrogiovanni Cerchier, Rudi Cassini, Federica Marcer Journal of Invertebrate Pathology.2023; 196: 107854. CrossRef
Molecular phylogeny, distribution, and pathogenicity of a novel thraustochytrid protist in the Manila clam, Ruditapes philippinarum, on the west and south coasts of Korea Biyun Zhao, Seung-Hyeon Kim, Dae-Woong Koh, S.D.N.K. Bathige, Kwang-Sik Choi, Kyung-Il Park Aquaculture.2023; 575: 739779. CrossRef
Biotic and abiotic drivers affect parasite richness, prevalence and abundance inMytilus galloprovincialisalong the Northern Adriatic Sea C. Bommarito, M. Wahl, D.W. Thieltges, C. Pansch, M. Zucchetta, F. Pranovi Parasitology.2022; 149(1): 15. CrossRef
Effects of larval trematode parasitism on the reproductive capacity of Manila clam Ruditapes philippinarum in a sandy-mud tidal flat on the west coast of Korea Young-Ghan Cho, Hye-Mi Lee, Jeong-Hwa Kim, Jong-Seop Shin, Hee-Do Jeung, Kwang-Sik Choi Frontiers in Marine Science.2022;[Epub] CrossRef
Negative Impacts of Perkinsus olseni Infection in Manila Clam Ruditapes philippinarum Observed from Tidal Flats in Anmyeondo Island on the West Coast of Korea During Post-Spawning Period Hye-Mi Lee, Kyung-Il Park, Hyun-Sung Yang, Kwang-Sik Choi Ocean Science Journal.2021; 56(3): 307. CrossRef
Jong-Yil Chai, Bong-Kwang Jung, Taehee Chang, Hyejoo Shin, Jaeeun Cho, Jin-Youp Ryu, Hyun-Seung Kim, Kwanghoon Park, Mun-Hyoo Jeong, Eui-Hyug Hoang, Marzuki Bin Muhammad Abdullah
Korean J Parasitol 2021;59(1):35-45. Published online February 19, 2021
Adult echinostomes having 37 collar spines collected from the intestine of Pitalah ducks in Aceh Province, Indonesia in 2018 were morphologically and molecularly determined to be Echinostoma miyagawai Ishii, 1932 (Digenea: Echinostomatidae). Among 20 ducks examined, 7 (35.0%) were found to be infected with this echinostome, and the number of flukes collected was 48 in total with average 6.9 (1-17) worms per duck. The adult flukes were 7.2 (6.1-8.5) mm in length and 1.2 (1.0-1.4) mm in width (pre-ovarian or testicular level) and characterized by having a head collar armed with 37 collar spines (dorsal spines arranged in 2 alternating rows), including 5 end group spines, and variable morphology of the testes, irregularly or deeply lobed (3-5 lobes) at times with horizontal extension. The eggs within the worm uterus were 93 (79-105) ?m long and 62 (56-70) ?m wide. These morphological features were consistent with both E. miyagawai and Echinostoma robustum, for which synonymy to each other has been raised. Sequencing of 2 mitochondrial genes, cox1 and nad1, revealed high homology with E. miyagawai (98.6-100% for cox1 and 99.0-99.8% for nad1) and also with E. robustum (99.3-99.8% for nad1) deposited in GenBank. We accepted the synonymy between the 2 species and diagnosed our flukes as E. miyagawai (syn. E. robustum) with redescription of its morphology. Further studies are required to determine the biological characteristics of E. miyagawai in Aceh Province, Indonesia, including the intermediate host and larval stage information.
Citations
Citations to this article as recorded by
Development of a duplex loop-mediated isothermal amplification together with lateral flow dipstick assay for the detection and discrimination of parasitic infections in chickens between cestodes belonging to genus Raillietina and trematodes in family Echi Wasin Panich, Thanawan Tejangkura, Thapana Chontananarth Research in Veterinary Science.2025; 185: 105539. CrossRef
The Nuclear Ribosomal Transcription Units of Two Echinostomes and Their Taxonomic Implications for the Family Echinostomatidae Yu Cao, Ye Li, Zhong-Yan Gao, Bo-Tao Jiang Biology.2025; 14(8): 1101. CrossRef
Phylogeny and morphology of some Palearctic echinostomatid digeneans from rallid bird Fulica atra Linnaeus, 1758 Sergei A. Vlasenkov, Mikhail Yu. Shchelkanov, Sergey G. Sokolov Biologia.2025; 80(11): 3079. CrossRef
Catatropis indicus (Digenea: Notocotylidae) from ducks in Indonesia with a brief review of the genus Catatropis Jong-Yil Chai, Bong-Kwang Jung, Taehee Chang, Sooji Hong, Hyejoo Shin, Marzuki Bin Muhammad Abdullah Parasites, Hosts and Diseases.2025; 63(4): 303. CrossRef
Development and utilization of a visual loop-mediated isothermal amplification coupled with a lateral flow dipstick (LAMP-LFD) assay for rapid detection of Echinostomatidae metacercaria in edible snail samples Wasin Panich, Phonkawin Jaruboonyakorn, Awika Raksaman, Thanawan Tejangkura, Thapana Chontananarth International Journal of Food Microbiology.2024; 418: 110732. CrossRef
Molecular epidemiological analyses reveal extensive connectivity between Echinostoma revolutum (sensu stricto) populations across Eurasia and species richness of zoonotic echinostomatids in England Egie E. Enabulele, Scott P. Lawton, Anthony J. Walker, Ruth S. Kirk, Hudson Alves Pinto PLOS ONE.2023; 18(2): e0270672. CrossRef
A new cryptic species of Echinostoma (Trematoda: Echinostomatidae) closely related to Echinostoma paraensei found in Brazil Marisa C. Valadão, Philippe V. Alves, Danimar López-Hernández, Jordana C. A. Assis, Paulo R. S. Coelho, Stefan M. Geiger, Hudson A. Pinto Parasitology.2023; 150(4): 337. CrossRef
A new species ofEchinostoma(Trematoda: Echinostomatidae) from the ‘revolutum’ group found in Brazil: refuting the occurrence ofEchinostoma miyagawai(=E. robustum) in the Americas Marisa C. Valadão, Danimar López-Hernández, Philippe V. Alves, Hudson A. Pinto Parasitology.2022; 149(3): 325. CrossRef
Echinostoma mekongi: Discovery of Its Metacercarial Stage in Snails, Filopaludina martensi cambodjensis, in Pursat Province, Cambodia Jong-Yil Chai, Woon-Mok Sohn, Jaeeun Cho, Bong-Kwang Jung, Taehee Chang, Keon Hoon Lee, Virak Khieu, Rekol Huy The Korean Journal of Parasitology.2021; 59(1): 47. CrossRef
Human hookworm infections caused by adult Ancylostoma spp. and Necator americanus are one of the most important tropical diseases. We performed a survey of intestinal helminths using the Kato-Katz fecal examination technique targeting 1,156 villagers residing in 2 northern provinces (Preah Vihear and Stung Treng) of Cambodia in 2018. The results revealed a high overall egg positive rate of intestinal helminths (61.9%), and the egg positive rate of hookworms was 11.6%. Nine of the hookworm egg positive cases in Preah Vihear Province were treated with 5-10 mg/kg pyrantel pamoate followed by purging with magnesium salts, and a total of 65 adult hookworms were expelled in diarrheic stools. The adult hookworms were analyzed morphologically and molecularly to confirm the species. The morphologies of the buccal cavity and dorsal rays on the costa were observed with a light microscope, and the nucleotide sequences of mitochondrial cytochrome c oxidase subunit 1 (cox1) gene were analyzed. The majority of the hookworm adults (90.7%) were N. americanus, whereas the remaining 9.3% were Ancylostoma ceylanicum, a rare hookworm species infecting humans. The results revealed a high prevalence of hookworm infections among people in a northern part of Cambodia, suggesting the necessity of a sustained survey combined with control measures against hookworm infections.
Citations
Citations to this article as recorded by
The occurrence of cross-host species soil-transmitted helminth infections in humans and domestic/livestock animals: A systematic review Uniqueky Gratis Mawrie, Riviarynthia Kharkongor, María Martínez Valladares, Stella Kepha, Sitara S. R. Ajjampur, Rajiv Sarkar, Rachel Pullan, Muhammad Asaduzzaman PLOS Global Public Health.2025; 5(8): e0004614. CrossRef
Hookworm infections in carnivores in Iran: a One Health concern Meysam Sharifdini, Aida Vafae Eslahi, Majid Pirestani, Ali Asghari, Giovanni Sgroi, Elham Hajialilo, Arian Ghannadi Karimi, Anastasia Diakou, Milad Badri BMC Veterinary Research.2025;[Epub] CrossRef
Integrated Eco-Health approach significantly reduces helminth infections in endemic Khong islands with emphasis on Schistosoma mekongi Somphou Sayasone, Youthanavanh Vonghachack, Shang Xia, Shan Lv, Xiao-Nong Zhou, Peter Odermatt Infectious Diseases of Poverty.2024;[Epub] CrossRef
Prevention of Ancylostomiasis Transmission in Livestock and Stockmen with Good Hygiene Behavior and Cage Sanitation Meiningtiyas Indriyanti, Sayono Sayono, Wahyu Handoyo, Tri Dewi Kristini, Didik Sumanto International Journal of Medical Parasitology and Epidemiology Sciences.2024; 5(1): 11. CrossRef
High endemicity of Opisthorchis viverrini infection among people in northern Cambodia confirmed by adult worm expulsion Bong-Kwang Jung, Sooji Hong, Taehee Chang, Jaeeun Cho, Seungwan Ryoo, Keon Hoon Lee, Jeonggyu Lee, Woon-Mok Sohn, Sung-Jong Hong, Virak Khieu, Rekol Huy, Jong-Yil Chai Scientific Reports.2023;[Epub] CrossRef
Hookworm infection in central China: morphological and molecular diagnosis Fang Fang Xu, Yu Fei Niu, Wen Qing Chen, Sha Sha Liu, Jing Ru Li, Peng Jiang, Zhong Quan Wang, Jing Cui, Xi Zhang Parasites & Vectors.2021;[Epub] CrossRef
Taenia saginata infection has seldom been reported in Cambodia. In this study, we performed a survey of intestinal parasites in 1,156 residents of Preah Vihear and Stung Treng Provinces in 2018. The results revealed that 26 (2.4%) cases were positive for Taenia spp. eggs. In order to obtain the strobilae of the tapeworms, 2 patients in Preah Vihear were treated with praziquantel and purged with magnesium salts. The proglottids expelled after the medication were morphologically and molecularly analyzed to determine the species. The main uterine lateral braches in gravid proglottids were >15 in number suggesting that they are either T. saginata or Taenia asiatica. The sequences of the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene and 2 nuclear loci, elongation factor-1 alpha (ef1) and ezrin-radixin-moesin-like protein (elp), were identical to the sequences of T. saginata available in GenBank but distant from Taenia solium, T. asiatica, and T. saginata-T. asiatica hybrid. This is the first report of the presence of T. saginata in the northern part of Cambodia bordering Lao PDR based on a molecular confirmation.
Citations
Citations to this article as recorded by
High endemicity of Opisthorchis viverrini infection among people in northern Cambodia confirmed by adult worm expulsion Bong-Kwang Jung, Sooji Hong, Taehee Chang, Jaeeun Cho, Seungwan Ryoo, Keon Hoon Lee, Jeonggyu Lee, Woon-Mok Sohn, Sung-Jong Hong, Virak Khieu, Rekol Huy, Jong-Yil Chai Scientific Reports.2023;[Epub] CrossRef
Occurrence of a Hybrid Between Taenia saginata and Taenia asiatica Tapeworms in Cambodia Taehee Chang, Bong-Kwang Jung, Sooji Hong, Hyejoo Shin, Seungwan Ryoo, Jeonggyu Lee, Keon Hoon Lee, Hansol Park, Keeseon S. Eom, Virak Khieu, Rekol Huy, Woon-Mok Sohn, Jong-Yil Chai The Korean Journal of Parasitology.2021; 59(2): 179. CrossRef
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
Gymnophallid metacercariae found in the Manila clam Ruditapes philippinarum (‘Banjirak’ in Korean) from Gochang-gun, Jeollabuk-do, Korea were morphologically and molecularly confirmed to be Parvatrema duboisi (Dollfus, 1923) Bartoli, 1974. The metacercariae were morphologically characterized by having a large oral sucker, small ventral sucker, genital pore some distance anterior to the ventral sucker, no ventral pit, and 1 compact or slightly lobed vitellarium, which were all compatible with P. duboisi. Some of the metacercariae were experimentally fed to mice, and adult flukes were recovered at day 7 post-infection. The morphology of the adult flukes was basically the same as that of the metacercariae except for the presence of uterine eggs; the uterus was filled with up to 40 eggs. The nucleotide sequences (1,193 bp) from ITS regions (ITS1, 5.8S rDNA, and ITS2) of the metacercariae showed 99.7% identity with P. duboisi and 75.7% identity with Gymnophalloides seoi deposited in GenBank. These results confirmed the presence of P. duboisi metacercariae in the Manila clam R. philippinarum in an estuary region of Gochang-gun, Korea.
Citations
Citations to this article as recorded by
Survey of trematodes in Manila clam Ruditapes philippinarum on the west coast of Korea: A preliminary study Cuong Thanh Le, Hee-Do Jeung, Young-Ghan Cho, Kwang-Sik Choi Journal of Invertebrate Pathology.2024; 206: 108172. CrossRef
Description of a New Species of Bacciger (Digenea: Gymnophalloidea) Infecting the American Gizzard Shad, Dorosoma cepedianum (Lesueur, 1818), and Molecular Characterization of Cercaria rangiae Wardle, 1983, with Molecular Phylogeny of Related Digenea Stephen S. Curran, Micah B. Warren, Stephen A. Bullard Comparative Parasitology.2022;[Epub] CrossRef
Parvatrema duboisi (Digenea: Gymnophallidae) Life Cycle Stages in Manila Clams, Ruditapes philippinarum, from Aphae-do (Island), Shinan-gun, Korea Bong-Kwang Jung, Taehee Chang, Hyejoo Shin, Seungwan Ryoo, Sooji Hong, Jeonggyu Lee, Hyemi Song, Jaeeun Cho, Deok-Gyu Kim, Hojong Jun, Min-Jae Kim, Eun Jeong Won, Eun-Taek Han, Eun-Hee Shin, Jong-Yil Chai The Korean Journal of Parasitology.2021; 59(1): 83. CrossRef
Morphological and molecular characterization of larval digenean trematodes (Parvatrema: Gymnophallidae) and their pathological effects on the clam Leukoma thaca (=Protothaca thaca) (Bivalvia:Veneridae) (Molina, 1782) from northern Chile Diana Montenegro, María Soledad Romero, María Teresa González Parasitology International.2021; 80: 102238. CrossRef
Human infection with Echinostoma aegyptica Khalil and Abaza, 1924 (Trematoda: Echinostomatidae) is extremely rare. In this study, we confirmed E. aegyptica infection in 5 riparian residents living along the Mekong River in Savannakhet Province, Lao PDR. The patients revealed eggs of Opisthorchis viverrini/minute intestinal flukes, echinostomes, and other parasites in fecal examinations using the Kato-Katz technique. Following treatment with praziquantel 30-40 mg/kg and pyrantel pamoate 10-15 mg/kg in a single dose and purging with magnesium salts, adult specimens of various helminth species were collected. Among the trematodes, echinostome flukes of 4.5-7.6 mm in length (n = 134; av. 22.3 specimens per case) were of taxonomic interest and subjected in this study. The flukes were morphologically characterized by having total 43-45 collar spines arranged in 2 alternating rows (corner spines usually 5 on each side) and compatible with previous descriptions of E. aegyptica. The patients were mixed-infected with other helminths, so specific clinical manifestations due to this echinostome fluke were difficult to determine. The present paper describes for the first time human E. aegyptica infections in Lao PDR. This is the second report of human infection (2nd-6th cases) with E. aegyptica in the world following the first one from China.
Citations
Citations to this article as recorded by
High endemicity of Opisthorchis viverrini infection among people in northern Cambodia confirmed by adult worm expulsion Bong-Kwang Jung, Sooji Hong, Taehee Chang, Jaeeun Cho, Seungwan Ryoo, Keon Hoon Lee, Jeonggyu Lee, Woon-Mok Sohn, Sung-Jong Hong, Virak Khieu, Rekol Huy, Jong-Yil Chai Scientific Reports.2023;[Epub] CrossRef
Neglected food-borne trematodiases: echinostomiasis and gastrodiscoidiasis Rafael Toledo, María Álvarez-Izquierdo, J. Guillermo Esteban, Carla Muñoz-Antoli Parasitology.2022; 149(10): 1319. CrossRef
Echinostoma mekongi n. sp. (Digenea: Echinostomatidae) from Riparian People along the Mekong River in Cambodia Jaeeun Cho, Bong-Kwang Jung, Taehee Chang, Woon-Mok Sohn, Muth Sinuon, Jong-Yil Chai The Korean Journal of Parasitology.2020; 58(4): 431. CrossRef
Anisakiasis (anisakidosis) refers to a foodborne zoonosis caused by ingesting raw or undercooked marine fish or cephalopods infected with anisakid larvae. The present study was performed to investigate the prevalence of anisakid larvae in anchovies (Engraulisjaponica) purchased from 2 local markets in Gyeongsangnam-do, the Republic of Korea (=Korea), during 2018-2019. Anchovies were transported to our laboratory and examined by pepsin-HCl artificial digestion technique followed by microscopic observations and molecular analyses. The overall prevalence of anisakid larvae was 19.5% (39/200), from which a total of 51 larvae (av. 1.3 larvae/infected anchovy) were recovered. Sequencing of the larvae targeting the ITS region, including ITS1, 5.8S rRNA, and ITS2 genes confirmed the species of larvae as Anisakispegreffii (54.9%; 28/51), Hysterothylaciumsinense (23.5%; 12/51), and Hysterothylaciumaduncum (21.5%; 11/51). The results suggested that anchovies could be a potential source of human anisakiasis in Korea.
Citations
Citations to this article as recorded by
Occurrence and molecular identification of anisakid nematodes in anchovies from the Gulf of California, Mexico Dania López-Moreno, Marta Valmaseda-Angulo, Jesús Servando Hernández-Orts, José A. Cruz-Barraza, Emigdio Marín-Enríquez, Rebeca Sánchez-Cárdenas, Marlenne Manzano-Sarabia, Felipe Amezcua, Juan R.F. Vallarta-Zarate, Francisco N. Morales-Serna Food Control.2026; 180: 111657. CrossRef
Genetic analyses of Anisakis pegreffii (Nematoda: Anisakidae) from the East Asian finless porpoise Neophocaena asiaeorientalis sunameri (Cetacea: Phocoenidae) in Korean waters Sunmin Kim, Jong Yoon Jeon, Kyunglee Lee, Hyunjoo Lee, Han Chan Park, Kyung Eun Lee, Hang Lee, Sung Bin Lee, Sang Wha Kim, Se Chang Park, Seongjun Choe, Heejeong Youn Parasitology Research.2024;[Epub] CrossRef
Diatoms-endoparasite association in fish from the marine pacific coast of Colombia (Buenaventura) Vanessa Potosi-Pai, Carlos E. Agudelo Morales, Javier Antonio Benavides-Montaño, Shawky M. Aboelhadid PLOS ONE.2024; 19(12): e0312015. CrossRef
Adult specimens of Echinochasmus caninus n. comb. (Verma, 1935) (Trematoda: Echinostomatidae) (syn. Episthmium caninum Yamaguti, 1958) were recovered from 11 riparian people who resided along the Mekong River in Khammouane Province, Lao PDR. In fecal examinations done by the Kato-Katz technique, the cases revealed eggs of Opisthorchis viverrini/minute intestinal flukes, hookworms, and in 2 cases echinostome eggs. To recover the adult helminths, praziquantel 30-40 mg/kg and pyrantel pamoate 10-15 mg/kg in a single dose were given and purged with magnesium salts. Various species of trematodes (including O. viverrini and Haplorchis spp.), cestodes, and nematodes were recovered from their diarrheic stools. Among the trematodes, small echinostome flukes (n=42; av. 3.8 specimens per case) of 0.7-1.2 mm in length are subjected in this study. They are morphologically characterized by having 24 collar spines interrupted dorsally and anterior extension of vitellaria from the cirrus sac or genital pore level to the posterior end of the body. Particularly based on this extensive distribution of vitellaria, the specific diagnosis was made as Echinochasmus caninus. The cases were co-infected with various other helminth parasites; thus, clinical manifestations specific for this echinostome infection were difficult to determine. The present paper describes for the first time human E. caninus infections in Lao PDR. Our cases marked the 4-14th human infections with this echinostome around the world following the 3 previous cases reported from Thailand.
Citations
Citations to this article as recorded by
Neglected food-borne trematodiases: echinostomiasis and gastrodiscoidiasis Rafael Toledo, María Álvarez-Izquierdo, J. Guillermo Esteban, Carla Muñoz-Antoli Parasitology.2022; 149(10): 1319. CrossRef
General overview of the current status of human foodborne trematodiasis Jong-Yil Chai, Bong-Kwang Jung Parasitology.2022; 149(10): 1262. CrossRef
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 The Korean Journal of Parasitology.2020; 58(1): 67. CrossRef
Echinostoma mekongi n. sp. (Digenea: Echinostomatidae) from Riparian People along the Mekong River in Cambodia Jaeeun Cho, Bong-Kwang Jung, Taehee Chang, Woon-Mok Sohn, Muth Sinuon, Jong-Yil Chai The Korean Journal of Parasitology.2020; 58(4): 431. CrossRef
Echinostoma macrorchis Metacercariae in Cipangopaludina chinensis malleata from Xiengkhuang Province, Lao PDR and Morphologies of Adults from Experimental Animals Woon-Mok Sohn, Byoung-Kuk Na, Dongmin Lee, Keeseon S. Eom, Tai-Soon Yong, Jong-Yil Chai, Duk-Young Min The Korean Journal of Parasitology.2019; 57(6): 657. CrossRef
First
Prev
