2020
DOI: 10.1371/journal.pntd.0008286
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Liver fluke infections by Amphimerus sp. (Digenea: Opisthorchiidae) in definitive and fish intermediate hosts in Manabí province, Ecuador

Abstract: Amphimerus sp. is a fluke that dwells in the biliary tracts of vertebrate definitive hosts including humans, domestic, and wild mammals in Latin America. Opisthorchiid liver infections are rarely studied in the Americas confirming its status as a neglected tropical disease. In Ecuador, small trematode eggs were reported in human cases from the province of Manabí in 1949, and recently, Amphimerus sp. adults were recovered from human and reservoir hosts in the province of Esmeraldas. Due to the lack of research … Show more

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Cited by 10 publications
(9 citation statements)
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References 40 publications
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“…The high prevalence of Aroapyrgus infection with Amphimerus found in this study of 15% (72/500 snails) is worrisome, but not surprising because the prevalence of infection reported in our previous study in humans in those same rural communities was 36%, as was likewise found in dogs and cats. 6 These data determine that the region studied is highly endemic in Amphimerus transmission, which pathogen is dynamic throughout the year. Therefore, in view of the high prevalence of parasitism in this gastropod, Aroapyrgus is evidently a highly efficient intermediate host in the life cycle of this liver fluke, whose endemicity is of great significance with respect to transmission to humans, domestic and wild mammals, and piscivorous avians.…”
Section: Discussionmentioning
confidence: 88%
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“…The high prevalence of Aroapyrgus infection with Amphimerus found in this study of 15% (72/500 snails) is worrisome, but not surprising because the prevalence of infection reported in our previous study in humans in those same rural communities was 36%, as was likewise found in dogs and cats. 6 These data determine that the region studied is highly endemic in Amphimerus transmission, which pathogen is dynamic throughout the year. Therefore, in view of the high prevalence of parasitism in this gastropod, Aroapyrgus is evidently a highly efficient intermediate host in the life cycle of this liver fluke, whose endemicity is of great significance with respect to transmission to humans, domestic and wild mammals, and piscivorous avians.…”
Section: Discussionmentioning
confidence: 88%
“…The streams surveyed were those that cross the rural villages studied in our previous publication and considered endemic for human and animal amphimeriasis. 6 The streams are part of the PPG River system, some with permanent water throughout the year. Numerous reservoirs are also present with relatively appropriate environmental conditions for providing suitable habitats for freshwater snails (Figure 1).…”
Section: Methodsmentioning
confidence: 99%
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