Digenean parasites of Sigmodontinae rodents from Argentina: a list of species, new host, and geographical records

Abstract

Introduction

Among Argentinean rodents, only one species of Muridae and seven of Cricetidae were reported as digenean hosts. Despite the available data, the taxonomic diversity of the Digenea from rodents has been little explored. An update on digeneans of Sigmodontinae rodents (Cricetidae-Muroidea) in Cuenca del Plata is provided. New host and geographical data are recorded and taxonomic and ecological data are summarized.

Methods

Rodents were collected from 11 localities in the region Cuenca del Plata, Argentina. Moreover, other unidentified specimens from four localities, deposited in the Colección de Helmintología del Museo de La Plata, were studied. Prevalence, mean intensity, and mean abundance are provided.

Results

Eight species of digeneans belonging to four families were identified. Twelve new geographical records for five provinces of Argentina are presented. In addition, six new host–parasite associations are reported. The information is presented in a taxonomic list for each digenean species: site of infection, host records, locality records, and comments.

Conclusions

It becomes interesting to explore the diets and habits of each rodent species to understand the dispersal and transmission ability of each group of digeneans. This survey constitutes an update on digeneans of Sigmodontinae rodents in Cuenca del Plata, Argentina.

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Acknowledgements

We thank Ulyses Pardiñas, Carlos Galliari, Marcela Lareschi, Juliana Notarnicola, Mariano Merino, Juliana Sanchez, Erika Cuellar, Ekaterina Savchenko, Mara Urdapilleta, and Ezequiel Palumbo for their cooperation in host collections; to Ulyses Pardiñas and Carlos Galliari for the identification of the hosts to Micaela Rojas for collaborating with the parasitological examination; to Lucas Garbin for the revision of the English version.

Funding

Agencia Nacional de Promoción Científica y Tecnológica (PICT 2015-1348), Universidad Nacional de La Plata (No. 861), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, PUE CEPAVE 2016 and fellowship NGM).

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All the authors contributed to the study conception and design. MRR, NGM, and GP collected the host specimens together with specialists in mammals and parasites (see Acknowledgements). MRR, NGM, and GP examined the viscera of specimen hosts. NGM, MRR, JID, GP, GN contributed equally in the identification of the species and in the writing of the manuscript. All the authors read and approved the final manuscript.

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Correspondence to María del Rosario Robles.

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Guerreiro Martins, N.B., Robles, M., Diaz, J.I. et al. Digenean parasites of Sigmodontinae rodents from Argentina: a list of species, new host, and geographical records. Acta Parasit. 65, 97–107 (2020). https://doi.org/10.2478/s11686-019-00136-7

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Keywords

  • Argentina
  • Cricetidae
  • Digeneans
  • Platyhelminthes
  • Rodentia