Echinostomes

Chai, Jong-Yil

doi:10.1007/978-94-024-1704-3_2

Cited by 7 publications

(3 citation statements)

References 382 publications

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“…Hypoderaeum conoideum is considered a neglected humaninfecting trematode. It is among the 23 zoonotic species representing 8 genera of the Echinostomatidae family distributed mostly in Southeast Asia and Europe (Saijuntha et al, 2013;Chai, 2019). These trematodes are transmitted via ingestion of raw or inadequately cooked fish, amphibians, and molluscs and can cause abdominal pain, fatigue, diarrhea and weight loss in humans (Saijuntha et al, 2013;Chai, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…It is among the 23 zoonotic species representing 8 genera of the Echinostomatidae family distributed mostly in Southeast Asia and Europe (Saijuntha et al, 2013;Chai, 2019). These trematodes are transmitted via ingestion of raw or inadequately cooked fish, amphibians, and molluscs and can cause abdominal pain, fatigue, diarrhea and weight loss in humans (Saijuntha et al, 2013;Chai, 2019). Hypoderaeum conoideum is commonly found in the small intestine of birds such as ducks, geese, swans, wild aquatic birds, and chickens in many regions of the world.…”

Section: Discussionmentioning

confidence: 99%

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Trematode Cercariae from Lymnaea gedrosiana in the Caspian Sea Littoral in Iran: a one health concern

et al. 2023

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IntroductionLymnaea gedrosiana snails are hosts to a variety of trematode cercaria of public and veterinary health importance. In Guilan Province, Iran, a region with a high level of fish and bird farming and wetlands important for migratory birds, little is known about the trematode cercaria from L. gedrosiana.MethodsFrom April 2020 to October 2021, six freshwater sites in Guilan Province were sampled for Lymnaeidae snails three times per season (spring, summer, autumn and winter). Snails were exposed to light and heat to induce cercaria shedding and shredded cercaria were identified morphologically and molecularly.ResultsIn total, 5,712 Lymnaeidae snails were collected of which 3,288 (57.6%) were identified to be L. gedrosiana with 54.3% containing trematode cercaria. Snail and cercaria recovery were highest in the spring and summer. Trematode cercaria identified included Telorchis assula, Hypoderaeum conoideum, Apharyngostrigea pipientis, Sanguinicola cf. inermis, Opisthioglyphe ranae, Diplostomum pseudospathaceum, and Australapatemon burti.DiscussionThe four trematodes D. pseudospathaceum, S. inermis, A. burti, and A. pipientis have not been previously reported in Iran; all four of these can infect migratory birds. The most common cercaria found, H. conoideum (18.3% of the snails) is of zoonotic importance. The third most common cercaria found, S. inermis (10.0% of the snails) is detrimental to fish production. Given the importance of the wetlands in the region for wildlife and migratory birds as well as the number of fish and bird farms in the area, efforts to control L. gedrosiana snails are needed to protect wildlife and human health. In addition, monitoring programs should be implemented to identify and prevent introductions of new trematode species.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Trematode Cercariae from Lymnaea gedrosiana in the Caspian Sea Littoral in Iran: a one health concern

et al. 2023

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“…and Radix spp. are the most important snail species [ 13 ], whereas, in E. miyagawai , Planorbis planorbis , Anisus vortex , and Radix peregra snails were reported to be natural first intermediate hosts [ 14 , 15 ]. Their cercariae are echinostome-type with an oral sucker armed with a spiny collar, ventral sucker, excretory bladder, and a moderately long tail [ 13 ].…”

Section: Discussionmentioning

confidence: 99%

Echinostoma mekongi: Discovery of Its Metacercarial Stage in Snails, Filopaludina martensi cambodjensis, in Pursat Province, Cambodia

et al. 2021

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Echinostoma mekongi was reported as a new species in 2020 based on specimens collected from humans in Kratie and Takeo Province, Cambodia. In the present study, its metacercarial stage has been discovered in Filopaludina martensi cambodjensis snails purchased from a local market nearby the Tonle Sap Lake, Pursat Province, Cambodia. The metacercariae were fed orally to an experimental hamster, and adult flukes were recovered at day 20 post-infection. They were morphologically examined using light and scanning electron microscopes and molecularly analyzed by sequencing of their mitochondrial cox1 and nad1 genes. A total of 115 metacercariae (1-8 per snail) were detected in 60 (60.0%) out of 100 Filopaludina snails examined. The metacercariae were round, 174 µm in average diameter (163-190 µm in range), having a thin cyst wall, a head collar armed with 37 collar spines, and characteristic excretory granules. The adult flukes were elongated, ventrally curved, 7.3 (6.4-8.2)×1.4 (1.1-1.7) mm in size, and equipped with 37 collar spines on the head collar (dorsal spines in 2 alternating rows), being consistent with E. mekongi. In phylogenetic analyses, the adult flukes showed 99.0-100% homology based on cox1 sequences and 98.9-99.7% homology based on nad1 sequences with E. mekongi. The results evidenced that F. martensi cambodjensis snails act as the second intermediate host of E. mekongi, and hamsters can be used as a suitable experimental definitive host. As local people favor to eat undercooked snails, these snails seem to be an important source of human infection with E. mekongi in Cambodia.

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Intron sequence variation of the echinostomes (Trematoda; Echinostomatidae): implications for genetic investigations of the 37 collar-spined, Echinostoma miyagawai Ischii, 1932 and E. revolutum (Fröelich, 1802)

et al. 2020

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Echinostomes

Cited by 7 publications

References 382 publications

Trematode Cercariae from Lymnaea gedrosiana in the Caspian Sea Littoral in Iran: a one health concern

Trematode Cercariae from Lymnaea gedrosiana in the Caspian Sea Littoral in Iran: a one health concern

Echinostoma mekongi: Discovery of Its Metacercarial Stage in Snails, Filopaludina martensi cambodjensis, in Pursat Province, Cambodia

Intron sequence variation of the echinostomes (Trematoda; Echinostomatidae): implications for genetic investigations of the 37 collar-spined, Echinostoma miyagawai Ischii, 1932 and E. revolutum (Fröelich, 1802)

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