Trematodes obtained from the thiarid freshwater snail Melanoides tuberculata (Müller, 1774) as vector of human infections in Thailand

Krailas, Duangduen; Namchote, Suluck; Koonchornboon, Tunyarut; Dechruksa, Wivitchuta; Boonmekam, Dusit

doi:10.3897/zse.90.7306

Cited by 43 publications

(58 citation statements)

References 37 publications

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“…According to this study, the morphology of the cercaria was found to be similar to that which was described in previous reports [1,15,18]. In recent studies, T. granifera and M. tuberculata have been noted as having a high level of susceptibility for heterophyid cercariae infection [18,30].…”

Section: Discussionsupporting

confidence: 87%

“…Two species of heterophyid trematodes have been identified in this study, namely, H. taichui and H. pumilio, which are known to infect humans and other mammals, and are widely distributed in many provinces of Thailand such as Chiang Mai, Phitsanulok, Mae Hong Son, Kamphaeng Phet, and Tak [10,23,30], as well as in other close countries, like Lao PDR, Korea and Vietnam [2,5,7,16]. A recent study conducted in Lao PDR revealed that many patients were infected with H. taichui, with a 99.8% of the trematode specimens identified in patients [2].…”

Section: Discussionmentioning

confidence: 99%

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Molecular confirmation of trematodes in the snail intermediate hosts from Ratchaburi Province, Thailand

Anucherngchai¹,

Tejangkura²,

Chontananarth³

2017

APJTD

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Molecular confirmation of trematodes in the snail intermediate hosts from Ratchaburi Province, Thailand

Anucherngchai¹,

Tejangkura²,

Chontananarth³

2017

APJTD

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“…Especially as liver flukes and intestinal flukes human infecting parasites are highly prevalent in Southeast Asian countries (Wongratanacheewin et al 2001, Krailas et al 2014. Infections caused by these flukes have a major public health impact and are also of economic importance in veterinary medicine.…”

Section: Introductionmentioning

confidence: 99%

Exploring the evolutionary potential of parasites: Larval stages of pathogen digenic trematodes in their thiarid snail host Tarebia granifera in Thailand

Veeravechsukij¹,

Namchote²,

Neiber³

et al. 2018

ZSE

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Minute intestinal flukes from several distinct families of endoparasitic platyhelminths are a medically important group of foodborne trematodes prevalent throughout Southeast Asia and Australasia. Their lifecycle is complex, with freshwater snails as primary intermediate hosts, with infecting multiple species of arthropods and fish as second intermediate hosts, and with birds and mammals including humans as definitive hosts. In Southeast Asian countries, the diversity of snail species of the Thiaridae which are frequently parasitized by trematode species is extremely high. Here, the thiarid Tarebiagranifera in Thailand was studied for variation of trematode infections, by collecting the snails every two months for one year from each locality during the years 2004–2009, and during 2014–2016 when snails from the same localities were collected and new localities found. From ninety locations a total of 15,076 T.granifera were collected and examined for trematode infections. With 1,577 infected snails the infection rate was found to be 10.46 %. The cercariae were categorized into fifteen species from eight morphologically distinguishable types representing several distinct families, viz. (i) virgulate xiphidiocercariae (Loxogenoidesbicolor, Loxogenesliberum and Acanthatriumhistaense), (ii) armatae xiphidiocercariae cercariae (Maritreminoidescaridinae and M.obstipus); (iii) parapleurophocercous cercariae (Haplorchispumilio, H.taichui and Stictodoratridactyla); (iv) pleurophocercous cercariae (Centrocestusformosanus); (v) megarulous cercariae (Philophthalmusgralli); (vi) furcocercous cercariae (Cardicolaalseae, Alariamustelae and Transversotremalaruei); as well as (vii) echinostome-type cercariae, and (viii) gymnocephalous-type cercariae. In addition, a phylogenetic marker (internal transcribed spacers 2, ITS2) was employed in generic and infrageneric level classifications of these trematodes, using sequences obtained from shed cercariae isolated from T.granifera specimens of the second study period collected in various regions in Thailand. We obtained ITS2 sequences of cercariae from nine species (of seven types): Loxogenoidesbicolor, Loxogenesliberum, Maritreminoidesobstipus, Haplorchistaichui, Stictodoratridactyla, Centrocestusformosanus, Philophthalmusgralli, as well as from one species each of echinostome cercariae and gymnocephalous cercariae. Thus, this analysis combines the parasites’ data on morphology and geographical occurrence with molecular phylogeny, aiming to provide the groundwork for future studies looking into more details of the parasite-snail evolutionary relationships.

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“…A checklist from 136 scientific published studies revealed that Melanoides tuberculata could be host for flukes, identified as belonging to 17 families, 25 genera, and 37 species. These trematodes are both animals and human parasites (17), and the presence of various cercariae of Melanopsis snails in some parts of Khuzestan province and their potential to make zoonotic diseases such as heterophyiasis, echinostomiasis and philophthalmiasis in human and animals was previously proved (18). The identification of medically important snails helps to control them.…”

Section: Discussionmentioning

confidence: 99%

Identification of Medically Important Snails of Miangran Lake in Izeh, Khuzestan Province of Iran

Nouroozi¹

2015

Avicenna J Clin Microbiol Infect

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Background: Some freshwater snails are acting as intermediate hosts for digenetic trematodes. Studies on distribution of freshwater snails are important to determine the transmission patterns of the trematoda. Objectives: The current study aimed to identify medically important snails of Miangran Lake in Izeh, Khuzestan province, Iran. Materials and Methods: Sampling was conducted in fourteen sites around Miangran Lake in 2014. The collected samples were placed in plastic containers containing 70% ethyl alcohol, prior to consideration. The identification was carried out according to shell characteristics. Data were analyzed descriptively. Results: All sampling sites were positive for medically important snails. Overall, nine genera and thirteen species were identified. The most diversity in genus was found in Melanopsis. Five genera of snails detected in the study with known medical importance include: Bithynia spp., Bulinus spp., Lymnaea spp., Melanoides spp. and Melanopsis spp. Melanoides spp. was observed in thirteen and Bellamya spp. was identified in two sites. Also, in this study Melanoides spp., Bulinus spp., and Lymnaea spp. were widespread snails around Miangran Lake. Conclusions: The reason for difference in the detected snail genera in sampling sites may be due to various physicochemical factors. According to the current study, medically important snails exist in Miangran Lake and they could be a source of trematode infections for the local people. Controlling measures after comprehensive studies should be applied.

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Trematodes obtained from the thiarid freshwater snail Melanoides tuberculata (Müller, 1774) as vector of human infections in Thailand

Cited by 43 publications

References 37 publications

Molecular confirmation of trematodes in the snail intermediate hosts from Ratchaburi Province, Thailand

Molecular confirmation of trematodes in the snail intermediate hosts from Ratchaburi Province, Thailand

Exploring the evolutionary potential of parasites: Larval stages of pathogen digenic trematodes in their thiarid snail host Tarebia granifera in Thailand

Identification of Medically Important Snails of Miangran Lake in Izeh, Khuzestan Province of Iran

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