Parasite surveys and environmental management for prevention of parasitic infection in cultivated Barbonymus gonionotus (Cyprinidae) in fishponds, in an opisthorchiasis endemic area of northeast Thailand

Tesana, Smarn; Thabsripair, Pairat; Suwannatrai, Apiporn; Haruay, Surat; Piratae, Supawadee; Khampoosa, Panita; Thammasiri, Chalida; Prasopdee, Sattrachai; Kulsantiwong, Jutharat; Chalorkpunrut, Prapart; Jones, Malcolm K.

doi:10.1016/j.aquaculture.2014.02.031

Cited by 13 publications

(10 citation statements)

References 17 publications

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“…Basically, notocotylid trematodes require birds and mammals as their definitive hosts and inhabit the small intestine, colon and caeca (Schell, 1970;Frandsen and Christensen, 1984;Zhytova et al, 2019;Selbach et al, 2020). Several studies in Thailand, particularly northern and northeastern regions, have reported monostome cercaria infections in bithyniid snails, as discovered in the current study (Ngern-klun et al, 2006;Chontananarth and Wongsawad, 2013;Tesana et al, 2014;Kiatsopit et al, 2015;Kulsantiwong et al, 2015;Namsanor et al, 2015;Anucherngchai et al, 2016;Kulsantiwong et al, 2017;Chantima et al, 2018).…”

Section: Discussionsupporting

confidence: 68%

Cercarial trematodes in freshwater snails from Bangkok, Thailand: prevalence, morphological and molecular studies and human parasite perspective

2020

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We investigated the prevalence, morphological characters and molecular classifications of trematode cercariae in freshwater snails randomly collected from 59 sampling localities in Bangkok from May 2018 to March 2019. We used a crushing technique to observe the cercarial stage inside each snail body and amplified the internal transcribed spacer 2 regions of cercarial DNA using polymerase chain reaction methodology. The associated phylogenetic tree was reconstructed using Bayesian inference analyses. A total of 517 of 15 621 examined snails were infected with trematode cercariae, and the infected snails were classified into 11 species of seven families with a 3.31% overall prevalence of the infection. The Bithynia siamensis siamensis snail displayed the highest prevalence of infection (16.16%), whereas the Physella acuta snail exhibited the lowest prevalence (0.08%) of infection. Eight morphological types of cercariae were observed. The highest prevalence of infection was observed in mutabile cercaria (1.86%). Based on molecular investigations, the phylogram revealed eight cercaria types assigned to at least nine digenean trematode families, of which five belong to groups of human intestinal flukes. Although, with the exception of schistosome cercaria, trematode cercariae are not known to directly damage humans, understanding the general biology of trematode cercariae (including diversity, distribution, infection rates and host range) is important and necessary for the prevention and control of parasitic transmission that impacts aquatic cultivations, livestock farming and human health.

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Section: Discussionsupporting

confidence: 68%

Cercarial trematodes in freshwater snails from Bangkok, Thailand: prevalence, morphological and molecular studies and human parasite perspective

2020

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“…In B. s. goniomphalos s.l. from Thailand, 15 groups of cercariae have been found: amphistome, echinostome, monostome, strigea, furcocercaria, pleurolophocercous, parapleurolophocercous, lophocercous, virgulate, ubiquita, xiphidiocercaria, ophthalmoxiphidiocercaria, tailless cercariae, cystophorous and gymnocephalous cercariae (Ito et al , 1962; Wykoff et al , 1965; Adam et al , 1993; Nithiuthai et al , 2002; Lohachit, 2004–2005; Kodcharin, 2005; Sri-Aroon et al , 2005, 2007; Tesana et al , 2014). Only O. viverrini and one pleurolophocercous species have been reported so far from B. s. goniomphalos s.l.…”

Section: Introductionmentioning

confidence: 99%

Trematode diversity in the freshwater snail Bithyniasiamensisgoniomphalos sensu lato from Thailand and Lao PDR

et al. 2015

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In order to obtain a comprehensive understanding of trematode diversity in Bithynia siamensis goniomphalos sensu lato, the first intermediate host of the liver fluke Opisthorchis viverrini s.l., the prevalence of larval trematode species was investigated in different localities in Thailand and Lao People's Democratic Republic (Lao PDR). In Thailand, snail samples were collected from 29 localities in the nine provinces: Buri Ram, Surin, Chaiya Phum, Maha Sarakham, Khon Kaen, Kalasin, Mukdahan, Sakon Nakhon and Nakhon Phanom. In Lao PDR, snail samples were collected from 21 localities in Vientiane Province and six localities in Savannakhet Province. Snails were identified by standard morphological criteria and then examined for trematode infection using the cercarial shedding method. Twenty different types of cercariae were detected and identified, based on morphological criteria. Virgulate type 1 emerged as the most common cercaria, with an average prevalence of 10.90% (range 0.26-54.22%) in Thailand and 6.58% (range 1.15-89.77%) in Lao PDR. Opisthorchis viverrini s.l. cercariae were the fourth most common in Thailand, with an average prevalence of 1.59% (0.15-6.93), while in Lao PDR their prevalence was 0.96% (0.08-8.37). The high diversity of trematode cercariae observed in this study indicates that B. s. goniomphalos s.l. is highly susceptible to infection with a variety of trematode species. However, the role of non-opisthorchiid trematodes as fish-borne parasites in human health is not fully known and further molecular identification is required.

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“…These often have several fold higher prevalences of infection than for O. viverrini s.l. 12 The xiphidiocercariae group, for example, has been subdivided into virgulate, ornatae, and armatae cercariae based on morphological differences. Virgulate cercariae are the most commonly found cercariae in B. s. goniomphalos.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Transmission of Opisthorchis viverrini sensu lato and a Lecithodendriid Trematode Species in Bithynia siamensis goniomphalos Snails in Northeast Thailand

Namsanor¹,

Sithithaworn²,

Kopolrat³

et al. 2015

The American Society of Tropical Medicine and Hygiene

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Abstract. Seasonal changes play roles in the transmission success of fish-borne zoonotic trematodes (FZT). This study examined the seasonal transmission patterns of Opisthorchis viverrini sensu lato (s.l.) and a virgulate cercaria (family Lecithodendriidae) in the snail intermediate host, Bithynia siamensis goniomphalos in northeast Thailand. Snail samples were collected monthly during the rainy, cool, and hot seasons during 2012-2013 to determine the prevalence and intensity of larval trematode infections. The prevalence of O. viverrini s.l. varied significantly with season, being 0.31%, 1.05%, and 0.37% in the rainy, cool, and hot seasons, respectively (P 0.05). Similarly, the prevalence of virgulate cercariae was 3.11%, 6.80%, and 1.64% in the rainy, cool, and hot seasons, respectively (P 0.05). The intensity of larval trematode infections also varied between seasons and peaked in the hot season (P 0.05) in both species. The snails infected with O. viverrini s.l. were significantly smaller (P 0.05) and those infected with virgulate cercariae were significantly larger (P 0.05) than uninfected snails. Seasonal variation and the different sizes of B. s. goniomphalos parasitized by O. viverrini s.l. and virgulate trematodes indicate complex host-parasite interactions with important implications for the epidemiology of O. viverrini s.l.

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Parasite surveys and environmental management for prevention of parasitic infection in cultivated Barbonymus gonionotus (Cyprinidae) in fishponds, in an opisthorchiasis endemic area of northeast Thailand

Cited by 13 publications

References 17 publications

Cercarial trematodes in freshwater snails from Bangkok, Thailand: prevalence, morphological and molecular studies and human parasite perspective

Cercarial trematodes in freshwater snails from Bangkok, Thailand: prevalence, morphological and molecular studies and human parasite perspective

Trematode diversity in the freshwater snail Bithyniasiamensisgoniomphalos sensu lato from Thailand and Lao PDR

Seasonal Transmission of Opisthorchis viverrini sensu lato and a Lecithodendriid Trematode Species in Bithynia siamensis goniomphalos Snails in Northeast Thailand

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