Molecular, morphological and experimental assessment of the life cycle of Posthodiplostomum nanum Dubois, 1937 (Trematoda: Diplostomidae) from Brazil, with phylogenetic evidence of the paraphyly of the genus Posthodiplostomum Dubois, 1936

Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases
Danimar López-HernándezHudson A Pinto

Abstract

Species of the genus Posthodiplostomum are intestinal parasites of piscivorous birds with worldwide distribution. Recent molecular surveys have focused on developmental stages from vertebrate hosts, with few sequences from larvae found in molluscs. Moreover, most published molecular data are from collections in North America, Europe and Asia, and there are no data for South American species. In the present study, cercariae found in the freshwater limpet Gundlachia ticaga from Brazil were used for morphological, experimental and molecular studies. The longifurcate cercariae, Neascus-type metacercariae obtained in experimentally infected guppies (Poecilia reticulata), and an adult parasite recovered from a mouse were morphologically identified as Posthodiplostomum nanum. Sequences of DNA from internal transcribed spacer (ITS) rDNA and cytochrome c oxidase 1 (cox1) from the cercariae and metacercariae were compared with published data, yielding no matches (ITS divergence ≥ 5.5%, cox1 ≥ 13.9%). Phylogenetic analyses of the ITS sequences suggest paraphyly within the genus Posthodiplostomum, or misidentifications of parasites in molecular studies. For example, ITS sequences of Mesoophorodiplostomum pricei and Posthodiplostomum centra...Continue Reading

References

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Feb 9, 2017·Journal of Helminthology·I Blasco-Costa, R Poulin
Jun 2, 2017·Journal of Helminthology·A C F LacerdaM L Martins

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Citations

Mar 17, 2020·Journal of Parasitic Diseases : Official Organ of the Indian Society for Parasitology·Luciano P NegreirosMarcos Tavares-Dias
Jan 8, 2021·Parasitology Research·Dora DaviesMargarita Ostrowski de Núñez

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